Thank You for Watching the fuel pump relay wiring video! Subscribe To This RUclips Channel: ruclips.net/user/4g63mightymax See My Wiring Playlist: ruclips.net/p/PLsF7T1tRFy2hmiiUUfMZNyV-BUA_yrPIh
Do you have a multipump tutorial of this? Can the relays be linked in parallel using 87a to one toggle switch for example having a surge tank with 4 fuel pumps and 4 5 pin relays? Then keeping the factory in tank pump connected to the factory wiring?
I followed your instructions and installed the new rellay it worked fine however I have a 86 f150 Ford it has a additional fuel pump inside the fuel tank do I have to wire the inside fuel pump I wired the front inline pump indepented from the original harness directly to battery and use a towel switch to activate the relay I need know if I need to wire a switch to operate the inside tank fuelpump in order to supply the front inline pump does it require it own relay system
Thanks George! I did one similar a few months ago and people really liked it. So I bought a few more relays, switches and fuses so that I can do some more automotive wiring how-to’s! :) Thanks for watching!
There are very few creators on YT that know what they are talking about and, secondly, can communicate their knowledge to others. You are one of only a tiny handful that gets my unqualified approval. Thanks!
I'm not a mechanic I'm not a electrician but this video helped fix my problem on the signal wire. The electrician told me the pump is gone an I have a racing pump saved alot off money THANK You VERY MUCH,🙏
That is the best possible comment I could hope for on one of my videos! Thank you so much for sharing it with me. I really am happy that the video gave you what you needed and saved you some cash !
I was 25 hours from home and this setup got me home. Moab to Detroit. Used a light bar wiring kit from Walmart. It had every component you listed. Can’t thank you enough.
That’s absolutely badass! I’m so incredibly thankful and excited you wrote this. It’s really motivating to know that my videos are actually helping out people! Thanks for watching!
@@WiringRescue I was stranded in a parking lot. it took me half a day to diagnose the short somewhere in my pump relay circuit. Crank no start. No voltage at the pump. Couldn’t find the short so I bypassed everything and used a rocker switch. You literally saved me thousands of dollars. The world is a better place with awesome people like you. Thanks again
I've used this 3 times now, thank you! Obd0 to obd1 honda conversion always messes with the fuel pump where it won't trigger it at all. This is a better fix than repinning the jumper harness
You are my mentor and you don’t even know it I will figure out a way to send you pics of my setup with everything I’ve learned from your channel when it’s done
@@WiringRescue I'll be undertaking this soon as I have no power on my fuel pump .. relay ok fuel pump ok ground ok but no power . The next step just hardwiring it and be done with it lol
You may add, that a relay needs to be diode protected in order for the circuit to be computer controlled. So that when the relay coil is turned off it does not back feed voltage into computer.
Thank you! If you like this one, you’ll probably like a few other more elaborate wiring videos I have! Sort my videos by views and check out the top ones if your bored :)
Thank you so much! I am having trouble to get 12 volts to the live wire. I will try your schematic to see if it works. Great video and well explained. God bless you Mr.
Yeah I used these 5 pin relays to add factory power windows to my vehicle. Bought a FSM wiring book then created my own wiring loom. Used heavier grade wires and they work faster than if factory installed.
Most ECUs control the pump (in fact all actuators and other stuff) with switched negative. Positive is always present at the pump, as switched positive can backfeed the ECU.
Thanks so much this helped me a lot. Been chasing wiring,fuses,relays, etc and still Didn’t have power to pump then decided try to re run it all Myself and found this video, thanks man
These videos are great. I found your channel at the perfect time. I’ve been rewiring a motorcycle harness and feel very overwhelmed, this honestly helped as this is on my list to do. Definitely glad to have came across this and now subscribed! Thank you
If you don't have a factory computer trigger wire make sure you run the trigger wire through an oil pressure switch, the last thing you want in an accident is the fuel pump running feeding a possible fire.
Agreed! Another option would be an inertia switch like I showed in this video. ruclips.net/video/MHgMHE6TUG8/видео.html. Thanks for watching and sharing a good tip!
😂 Thank you! This was one of my earliest wiring videos and it seems to be a hit. However, this one is my personal favorite ruclips.net/video/Yz9kqxWkoHI/видео.html
@WiringRescue question: could I use any 4 pin fuel pump relay from any car to create this setup. Plus does the relay need a earth wire for the relay to work. I just put an AEM 340LPH in a mitsubishi GTO in uk.
@@beastman.330- Mitsubishi GTO’s are awesome, and I happen to be a big Mitsu enthusiast actually . So - your 4 pin relay just needs to be rated for the amperage that your fuel pump draws. Most aftermarket relays are rated 25 or 30 amps, and I think a 340 will draw less than 20 if I recall correctly. You DO need to ground pin 85 on your relay to a good ground/earth. Then the pump will need a ground/earth wire as well. Your factory fuel pump wire will go to pin 86 and it will turn your relay on. Pin 87 will go to your pump. Pin 30 will be a fused power source from your battery. Again, this fuse should be rated just higher than your fuel pump amperage draw. And this wire needs to also be rated for a higher amperage than your fuel pump draws. I usually use 8 gauge wire when I rewire fuel pumps.
Hey just watched your video here. Really good stuff. I love how you've laid it out on this piece of cardboard and just made it really simple and straightforward. I love that. I feel like if you can lay stuff out in front of you and trace it out. It's just so much easier to visualize it and think about it in your head
Glad I found this. I am already a subscriber. I wired a relay off my ignition wire to aft as a “jumper” to keep my ign switch from overloading. But I think it’s causing issues. The pump does not come on now. Also my grounds should go to each other and on pin 85. Will try this. Pump worked before but I had aftermarket efi. Now I switched back to carb and the fuel pump does not work. Will rewire and retry! Before the ecm would “ground” the pump and switch it on.
Terrific explanation and diagram. I'm trying to drain the fuel tank on my 204 Buck Ranier, and have tried using a jumper, but I can't keep the pump running. I will have to study your setup and try again. Thank you.
thank you for this guide.....1972 vw beetle.....can the fused trigger be connected to the positive side of the coil or generator. i will still wire in a shut off switch on the trigger line.
every kill switch / fuel pump interrupt video on youtube is about a toggle switch. not one describes how to build a latching relay with a momentary push button. a momentary push button has an automatic reset with a latching relay setup, which is way more secure since you can't forget to reset the kill switch circuit. myself, personally, I would definitely forget making this kind of circuit useless for security. i know you're not necessarily talking about kill switches, but it would be nice if people could explain how to wire up a latching relay circuit with a momentary push button, because a toggle switch is less than ideal, and exactly where to tap into these power sources on the car itself. you'd do a great job of it. thanks!
How do you know what fuse to use? different fuses going to the same relay. For us laymen, how do we figure this out. Also, what do you suggest tying into for a Jeep YJ without an electric fuel pump? Key ignition?
I made a video for that! Here you go ruclips.net/video/EhzN6UdnmPA/видео.html. As for the YJ, grabbing an ignition source for the fuel pump relay would probably work okay, just make sure you have a fuel pressure regulator, because if your engine is off and your key is on, the fuel pump will run and flood the engine bigtime without one.
Thank you so much for posting this video! Any recommendations how to use trigger wire based on boost level or only turn it on when car is above certain rpm range ?
When it comes to upgrading fuel systems in turbochargerd cars, people usually upgrade the fuel pressure regulator to one that is a 1:1 rising rate. That way you can run a high volume fuel pump all the time and it runs like stock. However, when the turbo spools and starts making boost,the fuel pressure increases 1psi for every 1psi of boost. For higher horsepower applications (maybe 600hp+), you’ll get into larger fuel line, multiple pumps and surge tanks/swirl pots. Below that, 1 good high volume pump should do the job just fine.
Subscribed. That was what I needed thank you. I have a 2007 Acura TL. No power to the fuel pump. Fuse is good. Relay is good. Wiring is correct. I’m not sure what wrong with it. Maybe fuse box? I’ve run out of time and money so this may just have to do the trick.
Super helpful video! Maybe an ignorant question, but how do I determine the value of the fuses between the battery and pin 30 and between the trigger wire and pin 86?
Quick question, I'm trying to add a kill switch to my truck for the fuel pump... When I cut the positive wire to it from the fuse box do I run 2 wires from pin 87 to connect to each wire... Also since it's going to be on a rocker switch can I just add a jumper wire from pin 30 to 86 and it still work, or do I have to run pin 86 back to the battery...
Great video and easy to follow. I have my LS3 all hooked up accordingly, the pump comes on key ignition, and it starts up. however when I run the car down the road easily and then jump on it, the fuel pump shorts out, but not the fuse and stops the car. I would take a live 12V battery spare wire and hook it to the fuel pump wire and start the car and it starts so I could get back home, then I have to disconnect the "hot" wire off the fuel pump wire otherwise the engine would stay on after removing the key. What connection do I have wrong that would make the fuel pump cut out just by quickly jumping or accelerating the engine?
I think it would depend if the pressure switch is set to be 'open' or 'closed' when there is oil pressure. My best guess is that it would go in the middle of the 85 wire, but that is just a guess without knowing how your specific switch works.
Great video. I’m assuming I can use the same gauge wire if I’m switching over from a mechanical pump, amperage fuse according to manufacturer or is there a standard, thanks
If your ignition switch is already fused somewhere before it, then you won’t need a fuse on your trigger wire (pin 86). However, if that pin 86 were to accidentally short out, it will pop the fuse for the ignition which will shut down everything on the ignition circuit. So it’s up to you! :)
So, let me see if I understand this correctly? My situation I am converting from efi on my 1981 jeep cJ7. I am retaining my in-tank fuel module (fuel pump). the power from my fuel pump will connect to PIN 87 and 30 will be connected to battery power and My trigger PIN 86 if I wire in a switch can come from the same 12v power source as PIN 30? Or, I could wire in the switch off of PIN 86 to my ignition power source and I would have to switch the switch to on to get fuel or if I left it off, I could use accessories power and not have the pump running if I did not want to start the engine? Do I understand that correctly... Sorry if this is a stoopid question. Thanks for your video it has helped a lot.
As long as your trigger wire coming from the ECM is putting out 12v to activate the fuel pump, then yes! Connect that ECM wire to PIN 86 on the relay. Also - I'm quite jealous of your terminator X! I am dying to swap my 6.0L 64 Impala over to that instead of the flashed stock ECM. Good luck on your project, and thanks for watching!
I also found this that may help you out documents.holley.com/techlibrary_199r11760.pdf . It looks like the terminator X has a green 12v+ wire for the pump. So my comment above seems correct. :)
It depends how the fuel system is designed. Generally I’ll use the factory fuel pump power wire to turn on my relay (pin 86). By doing so, the fuel pump works just like a factory setup, but has a clean, strong power source directly from the battery. This allows a high volume fuel pump to not be restricted by factory wiring.
Dude the best video I'm a carpenter not an electrician and I've been looking for a week for a video that would simplify these things This video is straight into the point thank you 👍👍👍 Ps I will be sure to like and share and anything else to promote that I can
I enjoyed the video. Unfortunately, half of them say that pin 30 is the one with constant power. The other half suggest that the constantly hot pin is 87. I wouldn't care that much except that the diagram is on the relay rather than the fuse box. Unfortunately, a 4-pin relay can be installed two different ways if you catch my drift. I'm only looking to transfer some old gas out of the tank. Need to determine the exact location of pins 30 & 87. Thanks.
Great Practical Video! Made diagnosing my marine water pump a LOT easier (: And even MORE Amazing, you could do it without giving us "background" or the "history of" the fuel pump or the relay. Eventually, someone is going to figure out how to make a practical youtube. They should hire you to head it up.
Can this by pass the fuel pump relay in the fuse box? I shorted my fuel pump relay and pin 85(ground) melted a couple wire in some places through out the engine harness. My car cranks but won’t start. Was wondering if this could fix my issue, with the use of a hardwired/external fuel pump relay kit. Thanks in advance
I would say that is not super normal in my experience. If I were you, I would make sure the relay is properly rated for the amperage that you are drawing through it. For example, if your fuel pump is drawing 20 amps and you have a relay rated at 20 amps, you are right at its limit. It may be good to step up to a larger amperage relay. Relays are way cheaper than melted wires and fire! Good luck!
The wire size depends on the fuel pump you have. I actually made a video on that too! Check this one out, I think it will help make sense of it all. ruclips.net/video/EhzN6UdnmPA/видео.html
I Love the physical schematic and great explanation. I do have a question: on another video I saw that the presenter mentioned about wire “87A” as your direct hot wire to the fuel pump in case of emergency, is this true? . Now, my pump will run but it will not prime when I turn the key on, the vehicle requires, at least, two good long cranks to then start. After that, I can hear my fuel pump humming normally. I also replaced the relay only to observe the same behavior. Is this a sign my pump,is going bad? All of this happened after my mechanic replaced the electronic spark control among other things. Please shed some light? Thanks again!
Thanks for watching! I haven't seen that other video, so I can't be exactly sure how their circuit worked. There are many ways to wire a fuel pump though, so anything is possible. If the fuel pump isn't priming when you are trying to start it, I would expect it to be very difficult to start. If I were you, I would connect a fuel pressure gauge to the fuel system and see if it is getting fuel pressure when cranking the engine. If not, hunt down the reason why. It sounds like you may already know this reason. My guess is that your fuel pump is getting fed power in the "Run" position, but not the "Start" position. Good luck!
Are these wire setup safe on modern car's design? Because it have safety design built into ECU just in case there's an accident so that it can shut off vehicle fuel pump from not getting rpm input information from crankshaft sensor?
Will this cause the pump to burn out? I've got a 95 firebird, and im bypassing the stock relay due to an electrical gremlin. I was just going to run it off the ignition or a toggle.
Hello! The electricity works the same way on a diesel, so the relay circuitry should be the same! Good luck on your project and thanks for watching the video!
You can, but you need to remember to turn it on and off, and you need to make sure your fuel pressure regulator is working properly so that you don’t flood the engine when it’s not running. Good luck with the project and thanks for watching!
I have a question, I just don’t want to mess things up, trigger wired is it the same as signal. I have an 85 Pontiac Fiero the cables got burn so I need to Rewired the fuel pump.
If you wanted to have a hobb switch activate the secondary pump would you just run the trigger wire (86) to the NC on the Hobb Switch then once the pressure is reached it will close the circuit?
@@dwight_boi - you absolutely can. Or you can use the factory fuel pump feed wire to power pin 86 on the new relay. That way the new relay is controlled with all the factory key-on controls. That is assuming your factory setup works, which is seems like it may not. So - yeah, I’d probably just ignore all the factory stuff and do this setup instead.
So I’m adding a relay finally after a year later of having the bigger pump installed. Only one part remains of the install I’m not sure what to do with and that the old ground to my factory wiring? See I’m using two new terminal posts basically I made thru my hangar. I’ve inserted two new studs to use as my positive and negative so I no longer supply and power thru the cars factory small connectors. If I splice into the existing positive lead on my cars harness to you as the new relays trigger on 86 and then 87 connects to my new positive stud terminal i made and the I also ground my pump with the new termninals to the chassis. Now don’t I still need to them ground the factory harness original negative lead to complete the circuit to have it do what I need and he original wires to do, which is to trigger on my new relay ?
![How To Test and Diagnose Relays and Wiring [4 & 5 Pin]](http://i.ytimg.com/vi/S-DwV0HLsE4/mqdefault.jpg)
![How To Test and Diagnose Relays and Wiring [4 & 5 Pin]](/img/tr.png)
Thank You for Watching the fuel pump relay wiring video!
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Hi i want to asking something its possible the electric fuel pump with RPM tachometer connected
For what year vw vehicle is this video?
Thank you
very good video. very interesting and informative
Do you have a multipump tutorial of this? Can the relays be linked in parallel using 87a to one toggle switch for example having a surge tank with 4 fuel pumps and 4 5 pin relays? Then keeping the factory in tank pump connected to the factory wiring?
I followed your instructions and installed the new rellay it worked fine however I have a 86 f150 Ford it has a additional fuel pump inside the fuel tank do I have to wire the inside fuel pump I wired the front inline pump indepented from the original harness directly to battery and use a towel switch to activate the relay I need know if I need to wire a switch to operate the inside tank fuelpump in order to supply the front inline pump does it require it own relay system
Why does everyone else seem to take three times as long to describe half as much detail with a quarter of the clarity? Nice one... 👍
Thank you!! I’m glad it was able to help you out!
@@WiringRescue I just watched 5 videos trying to find this one...they should delete theirs. Thank you!
Facts wish this vid was out when I ran one
Visuals
I agree.
Funny how it’s easier to understand when placed out on a grid/chart compared to laying under a car trying to trace it ........ nice job
Thanks George! I did one similar a few months ago and people really liked it. So I bought a few more relays, switches and fuses so that I can do some more automotive wiring how-to’s! :) Thanks for watching!
There are very few creators on YT that know what they are talking about and, secondly, can communicate their knowledge to others. You are one of only a tiny handful that gets my unqualified approval. Thanks!
That’s extremely kind! Thank you so much for watching the wiring videos! I really appreciate it!
I'm not a mechanic I'm not a electrician but this video helped fix my problem on the signal wire. The electrician told me the pump is gone an I have a racing pump saved alot off money
THANK You VERY MUCH,🙏
That is the best possible comment I could hope for on one of my videos! Thank you so much for sharing it with me. I really am happy that the video gave you what you needed and saved you some cash !
U should see my face when the car started 😎 thanks again I appreciate your video,🙏🇿🇦
I was 25 hours from home and this setup got me home. Moab to Detroit. Used a light bar wiring kit from Walmart. It had every component you listed. Can’t thank you enough.
That’s absolutely badass! I’m so incredibly thankful and excited you wrote this. It’s really motivating to know that my videos are actually helping out people! Thanks for watching!
@@WiringRescue I was stranded in a parking lot. it took me half a day to diagnose the short somewhere in my pump relay circuit. Crank no start. No voltage at the pump. Couldn’t find the short so I bypassed everything and used a rocker switch. You literally saved me thousands of dollars. The world is a better place with awesome people like you. Thanks again
Watched so many videos and was still left scratching my head on what to do, until I watched yours so easy to follow and straight to the point 👌👍
That’s awesome! Thank you for watching my video!
What happens if I bypass fuel pump relay 85 - 86 on GM truck thanks buddy i so much worry do I made mistake on ECM to burn?
This is the best video on this subject. Simple, accurate, thorough and complete. The wire for the trigger showed where my problem was. Thank you !
That’s awesome! Thanks for watching, I’m glad that you found the video helpful!
I've used this 3 times now, thank you! Obd0 to obd1 honda conversion always messes with the fuel pump where it won't trigger it at all. This is a better fix than repinning the jumper harness
Heck yes! That’s awesome! I’m glad you are finding it useful! Thanks so much for watching!
You are my mentor and you don’t even know it I will figure out a way to send you pics of my setup with everything I’ve learned from your channel when it’s done
😂awesome! Post it on instagram and tag me in it @ratty_muscle_car
Im not great with stuff like this - That being said probably the best explanation out there
Thanks for watching! I have tons more wiring videos, if you find yourself bored this weekend. Good luck with your project!
@@WiringRescue I'll be undertaking this soon as I have no power on my fuel pump .. relay ok fuel pump ok ground ok but no power .
The next step just hardwiring it and be done with it lol
Thanks for making it so easy, I've put off installing an elec fuel pump for so long, now I can attack it with confidence.
That’s fantastic! I’m glad the video gave you what you needed!
Definitely the best explanation I've seen so far. Fuel pump relay went bad in my 04 Expedition and this is exactly what I needed.
Thank you! I'm glad it was able to help you out!
I'm here for the same reason on my 03 expedition. Lol what size fuse would be best for trigger and power? Same as factory fuse or something higher?
You may add, that a relay needs to be diode protected in order for the circuit to be computer controlled. So that when the relay coil is turned off it does not back feed voltage into computer.
I love this, straight to the point, very easily explained. So simple you need somebody to help you misunderstand it!😳
Thank you! If you like this one, you’ll probably like a few other more elaborate wiring videos I have! Sort my videos by views and check out the top ones if your bored :)
Videos like this make me love wiring and electrical. When I don't know, I absolutely hate it that you so much,. great video!
This was clear, not ‘wordy’, concise, and to the point…..unlike most others. Thx 👍
Thanks bro from Philippines. This is the presentation I've been looking for. God bless your channel
Thank you! I’m glad the video has helped you out!
Thank you so much! I am having trouble to get 12 volts to the live wire. I will try your schematic to see if it works.
Great video and well explained. God bless you Mr.
Glad you liked the video! Thanks for watching!
OMG! This is 110% perfect! Thank you so much for the short and simple explanation! Great video!
You’re very welcome! I’m glad it helped you out!
Yeah I used these 5 pin relays to add factory power windows to my vehicle. Bought a FSM wiring book then created my own wiring loom. Used heavier grade wires and they work faster than if factory installed.
Yes! These things are so cheap and universal, which is awesome. On a car, they have an infinite amount of uses. Thanks for watching the video!
Nicely done with the parts mounted on the board for a good visual learning experience.
Most ECUs control the pump (in fact all actuators and other stuff) with switched negative. Positive is always present at the pump, as switched positive can backfeed the ECU.
I was just watching a bunch of switching trough relay videos and none of them switched nor the relay or applications trough zero. What a shame.
Ummm.......nope. You will NEVER see always positive at a pump. If you do, you f'd up. You do, however, find constant positive at the relay
Thanks so much this helped me a lot. Been chasing wiring,fuses,relays, etc and still
Didn’t have power to pump then decided try to re run it all
Myself and found this video, thanks man
These videos are great. I found your channel at the perfect time. I’ve been rewiring a motorcycle harness and feel very overwhelmed, this honestly helped as this is on my list to do. Definitely glad to have came across this and now subscribed! Thank you
literally the best video i've seen on this. thank you
You helped me finish my project with this. This channel is a big help.
That’s fantastic! I’m thrilled to hear that my videos are helpful to people! Thanks for watching the video!
If you don't have a factory computer trigger wire make sure you run the trigger wire through an oil pressure switch, the last thing you want in an accident is the fuel pump running feeding a possible fire.
Agreed! Another option would be an inertia switch like I showed in this video. ruclips.net/video/MHgMHE6TUG8/видео.html. Thanks for watching and sharing a good tip!
I give this video a 10/10.
😂 Thank you! This was one of my earliest wiring videos and it seems to be a hit. However, this one is my personal favorite ruclips.net/video/Yz9kqxWkoHI/видео.html
@WiringRescue question: could I use any 4 pin fuel pump relay from any car to create this setup. Plus does the relay need a earth wire for the relay to work. I just put an AEM 340LPH in a mitsubishi GTO in uk.
@@beastman.330- Mitsubishi GTO’s are awesome, and I happen to be a big Mitsu enthusiast actually .
So - your 4 pin relay just needs to be rated for the amperage that your fuel pump draws. Most aftermarket relays are rated 25 or 30 amps, and I think a 340 will draw less than 20 if I recall correctly.
You DO need to ground pin 85 on your relay to a good ground/earth. Then the pump will need a ground/earth wire as well.
Your factory fuel pump wire will go to pin 86 and it will turn your relay on.
Pin 87 will go to your pump.
Pin 30 will be a fused power source from your battery. Again, this fuse should be rated just higher than your fuel pump amperage draw. And this wire needs to also be rated for a higher amperage than your fuel pump draws. I usually use 8 gauge wire when I rewire fuel pumps.
@WiringRescue Thank you very much, my friend.
@@beastman.330 - happy to help! Good luck with the Mitsu GTO!
simple and straight.
Very nice video that was fun to watch without getting confused or lost.
Awesome! I’m glad it was helpful to you! Thank you for watching!
Best video I’ve seen on the subject. You’re the man!
Good job. The least confusing version I've seen
Thank you! I’m thrilled to hear you found it helpful! :)
The best video on RUclips thank you
That’s a serious statement! Thank you so much! I appreciate it!
Complimenti, ottimo video, secondo te è possibile aggiornare questo cablaggio con un potenziometro di flusso per la pompa?
Hey just watched your video here. Really good stuff. I love how you've laid it out on this piece of cardboard and just made it really simple and straightforward. I love that. I feel like if you can lay stuff out in front of you and trace it out. It's just so much easier to visualize it and think about it in your head
Glad I found this. I am already a subscriber. I wired a relay off my ignition wire to aft as a “jumper” to keep my ign switch from overloading. But I think it’s causing issues. The pump does not come on now. Also my grounds should go to each other and on pin 85. Will try this. Pump worked before but I had aftermarket efi. Now I switched back to carb and the fuel pump does not work. Will rewire and retry! Before the ecm would “ground” the pump and switch it on.
Terrific explanation and diagram. I'm trying to drain the fuel tank on my 204 Buck Ranier, and have tried using a jumper, but I can't keep the pump running. I will have to study your setup and try again. Thank you.
Thank you for making this explanation so simple
Happy to help! Thank you for watching the video!
Wiring videos are all outstanding.
Thank you! I have a bunch if you're bored! Check out this playlist ruclips.net/video/c8JDQrUquw8/видео.html
@Roger Labbee Thank you! I really really appreciate that!
Best explanation to date, great content
Glad it was helpful! Thanks for watching!
thank you for this guide.....1972 vw beetle.....can the fused trigger be connected to the positive side of the coil or generator. i will still wire in a shut off switch on the trigger line.
B E A utiful ! I love this presentation!
Thanks! I’m glad you liked it! Subscribe and I’ll make more!
Thanks a lot for these videos... it's simple and well explained ...big thumbs up
Thanks for watching! I’m glad that you liked it!
exactly the video I was looking for thanks🍻
Awesome! I’m glad that it helped you out!
every kill switch / fuel pump interrupt video on youtube is about a toggle switch. not one describes how to build a latching relay with a momentary push button. a momentary push button has an automatic reset with a latching relay setup, which is way more secure since you can't forget to reset the kill switch circuit. myself, personally, I would definitely forget making this kind of circuit useless for security. i know you're not necessarily talking about kill switches, but it would be nice if people could explain how to wire up a latching relay circuit with a momentary push button, because a toggle switch is less than ideal, and exactly where to tap into these power sources on the car itself. you'd do a great job of it. thanks!
How do you know what fuse to use? different fuses going to the same relay. For us laymen, how do we figure this out. Also, what do you suggest tying into for a Jeep YJ without an electric fuel pump? Key ignition?
I made a video for that! Here you go ruclips.net/video/EhzN6UdnmPA/видео.html. As for the YJ, grabbing an ignition source for the fuel pump relay would probably work okay, just make sure you have a fuel pressure regulator, because if your engine is off and your key is on, the fuel pump will run and flood the engine bigtime without one.
Thank you so much for posting this video! Any recommendations how to use trigger wire based on boost level or only turn it on when car is above certain rpm range ?
When it comes to upgrading fuel systems in turbochargerd cars, people usually upgrade the fuel pressure regulator to one that is a 1:1 rising rate. That way you can run a high volume fuel pump all the time and it runs like stock. However, when the turbo spools and starts making boost,the fuel pressure increases 1psi for every 1psi of boost.
For higher horsepower applications (maybe 600hp+), you’ll get into larger fuel line, multiple pumps and surge tanks/swirl pots. Below that, 1 good high volume pump should do the job just fine.
Subscribed. That was what I needed thank you. I have a 2007 Acura TL. No power to the fuel pump. Fuse is good. Relay is good. Wiring is correct. I’m not sure what wrong with it. Maybe fuse box? I’ve run out of time and money so this may just have to do the trick.
hi, nice video, one question, what is the nominal value of fuse inline with fuel pump?
That all depends on your fuel pump. Check out this video where I explain how to figure out the correct size. ruclips.net/video/EhzN6UdnmPA/видео.html
Good video a lot info best video for fuel pump relays on RUclips
Thank you! I really appreciate that!
Just what i was looking for. I'm building an engine test stand, this will be perfect. Thanks so much.!!
Happy to help! I’ll likely be needing your channel’s advice as I do more work to my 71 Mercedes! ruclips.net/video/yvjzerUFvyI/видео.html
@@WiringRescue Absolutely. I also run a Facebook group " Mercedes Maintenance" join us. Loads of expert and helpful people there. Cheers John 🍻
Great vid I was about to install a switch for my hi pressure fuel pump but using a relay makes much more sence for my 500hp 65 GTO😛
Like how you explain everything, I'm your new subscriber now 👍
Thank you! I appreciate every subscriber I earn!
This is my next step after getting the break lights working
Excellent! I’m glad you find the videos helpful!
Super helpful video! Maybe an ignorant question, but how do I determine the value of the fuses between the battery and pin 30 and between the trigger wire and pin 86?
Great question! It depends on the components that you are using. I made a whole video about this actually! :) ruclips.net/video/EhzN6UdnmPA/видео.html
Quick question, I'm trying to add a kill switch to my truck for the fuel pump... When I cut the positive wire to it from the fuse box do I run 2 wires from pin 87 to connect to each wire... Also since it's going to be on a rocker switch can I just add a jumper wire from pin 30 to 86 and it still work, or do I have to run pin 86 back to the battery...
Watch all already. Wish you had more. All great.
I’ll keep making them if you keep watching them!
Good video, if I want run two pumps can I use 87a,or 87 split In two cables?
Great video and easy to follow. I have my LS3 all hooked up accordingly, the pump comes on key ignition, and it starts up. however when I run the car down the road easily and then jump on it, the fuel pump shorts out, but not the fuse and stops the car. I would take a live 12V battery spare wire and hook it to the fuel pump wire and start the car and it starts so I could get back home, then I have to disconnect the "hot" wire off the fuel pump wire otherwise the engine would stay on after removing the key. What connection do I have wrong that would make the fuel pump cut out just by quickly jumping or accelerating the engine?
You running dual tanks? I’m doing my first LS swap in a 77 C10 and could use some help where possible.
Heavier gauge wire, fuse, relay and good grounds. It seems like the pump is demanding more than it can get.
love the vids man. i definitely look forward to your videos... and not just cause im also ls swapping my 72 lemans as well!
Thank you Mike! I'll keep making them if you keep watching!
Perfect explanation!
Thank you! I appreciate the kind words.
I bought a tanks inc tank and pump with relay and safety pressure sensor., what wire goes to the oil pressure switch?
I think it would depend if the pressure switch is set to be 'open' or 'closed' when there is oil pressure. My best guess is that it would go in the middle of the 85 wire, but that is just a guess without knowing how your specific switch works.
Hi all, do you have to put a fuse in between the trigger switch and the relay??
Cheers
You do want a fuse in that circuit. I usually have a fuse before the trigger switch so that it protects the switch as well.
Great video. I’m assuming I can use the same gauge wire if I’m switching over from a mechanical pump, amperage fuse according to manufacturer or is there a standard, thanks
Hey if I wire (trigger) to my ignition barrel do I still need to fuze it.
Thanks for your videos 😊
If your ignition switch is already fused somewhere before it, then you won’t need a fuse on your trigger wire (pin 86). However, if that pin 86 were to accidentally short out, it will pop the fuse for the ignition which will shut down everything on the ignition circuit. So it’s up to you! :)
@@WiringRescue thanks so much for your prompt response 👍👍
Doing this can improve presure of fuel? Good for high load engine for racing?
So, let me see if I understand this correctly? My situation I am converting from efi on my 1981 jeep cJ7. I am retaining my in-tank fuel module (fuel pump). the power from my fuel pump will connect to PIN 87 and 30 will be connected to battery power and My trigger PIN 86 if I wire in a switch can come from the same 12v power source as PIN 30? Or, I could wire in the switch off of PIN 86 to my ignition power source and I would have to switch the switch to on to get fuel or if I left it off, I could use accessories power and not have the pump running if I did not want to start the engine? Do I understand that correctly... Sorry if this is a stoopid question. Thanks for your video it has helped a lot.
Would the trigger wire go to the ecm for example I am wiring a terminator x would the trigger wire go to the wire that is provided?
As long as your trigger wire coming from the ECM is putting out 12v to activate the fuel pump, then yes! Connect that ECM wire to PIN 86 on the relay. Also - I'm quite jealous of your terminator X! I am dying to swap my 6.0L 64 Impala over to that instead of the flashed stock ECM. Good luck on your project, and thanks for watching!
I also found this that may help you out documents.holley.com/techlibrary_199r11760.pdf . It looks like the terminator X has a green 12v+ wire for the pump. So my comment above seems correct. :)
@@WiringRescue thank you!!
It wont damage anything by leaving the pump on? It doesn’t hurt the engine right?
It depends how the fuel system is designed. Generally I’ll use the factory fuel pump power wire to turn on my relay (pin 86). By doing so, the fuel pump works just like a factory setup, but has a clean, strong power source directly from the battery. This allows a high volume fuel pump to not be restricted by factory wiring.
Great stuff can you advise what gauge wire you mean when you say heavy gauge and what size fuses would you use for this.
I actually made a video to answer that exact question. Check this out: ruclips.net/video/EhzN6UdnmPA/видео.html
Dude the best video
I'm a carpenter not an electrician and I've been looking for a week for a video that would simplify these things
This video is straight into the point
thank you 👍👍👍
Ps
I will be sure to like and share and anything else to promote that I can
This is what I needed! Thank you well put
I’m very happy that it helped you out! Thanks for watching!
I enjoyed the video. Unfortunately, half of them say that pin 30 is the one with constant power. The other half suggest that the constantly hot pin is 87. I wouldn't care that much except that the diagram is on the relay rather than the fuse box. Unfortunately, a 4-pin relay can be installed two different ways if you catch my drift. I'm only looking to transfer some old gas out of the tank. Need to determine the exact location of pins 30 & 87. Thanks.
Any tips? My ECU have strategies like low voltage at idle and 12v for the original fuel pump. Thanks.
Should fuses come befor or after toggle switch?
Great Practical Video! Made diagnosing my marine water pump a LOT easier (: And even MORE Amazing, you could do it without giving us "background" or the "history of" the fuel pump or the relay. Eventually, someone is going to figure out how to make a practical youtube. They should hire you to head it up.
Hello I just had a quick question, which fuses did you put in there and why?!
I made a video for this exact question! Check it out: ruclips.net/video/EhzN6UdnmPA/видео.html
Awesome thank you
What amp fuse should you use just to be safe ?
It all depends what you are using for parts. I made this video to answer this question though! Check it out ruclips.net/video/EhzN6UdnmPA/видео.html
Can this by pass the fuel pump relay in the fuse box? I shorted my fuel pump relay and pin 85(ground) melted a couple wire in some places through out the engine harness. My car cranks but won’t start. Was wondering if this could fix my issue, with the use of a hardwired/external fuel pump relay kit. Thanks in advance
You can replace your entire fuel pump circuit with this, as long as you have an ignition wire to power up pin 86 on the relay.
Just to be noted. My vehicle uses a ground loop to the oil presser sensor. It does heat the pump on start also.
Great video, do you have a video that explains how to wire dual relays to a selector valve for running dual fuel tanks?
Great job 👍🏻
Thank you! I really appreciate it!
Thanks for the content I did what you taught me but just one question is it normal for the relay to get a little warm?
I would say that is not super normal in my experience. If I were you, I would make sure the relay is properly rated for the amperage that you are drawing through it. For example, if your fuel pump is drawing 20 amps and you have a relay rated at 20 amps, you are right at its limit. It may be good to step up to a larger amperage relay. Relays are way cheaper than melted wires and fire! Good luck!
Thank you so much for the video!
What size gauge wire did you use?!
The wire size depends on the fuel pump you have. I actually made a video on that too! Check this one out, I think it will help make sense of it all. ruclips.net/video/EhzN6UdnmPA/видео.html
I Love the physical schematic and great explanation. I do have a question: on another video I saw that the presenter mentioned about wire “87A” as your direct hot wire to the fuel pump in case of emergency, is this true? . Now, my pump will run but it will not prime when I turn the key on, the vehicle requires, at least, two good long cranks to then start. After that, I can hear my fuel pump humming normally. I also replaced the relay only to observe the same behavior. Is this a sign my pump,is going bad? All of this happened after my mechanic replaced the electronic spark control among other things. Please shed some light? Thanks again!
Thanks for watching! I haven't seen that other video, so I can't be exactly sure how their circuit worked. There are many ways to wire a fuel pump though, so anything is possible. If the fuel pump isn't priming when you are trying to start it, I would expect it to be very difficult to start. If I were you, I would connect a fuel pressure gauge to the fuel system and see if it is getting fuel pressure when cranking the engine. If not, hunt down the reason why. It sounds like you may already know this reason. My guess is that your fuel pump is getting fed power in the "Run" position, but not the "Start" position.
Good luck!
Are these wire setup safe on modern car's design? Because it have safety design built into ECU just in case there's an accident so that it can shut off vehicle fuel pump from not getting rpm input information from crankshaft sensor?
Will this cause the pump to burn out? I've got a 95 firebird, and im bypassing the stock relay due to an electrical gremlin. I was just going to run it off the ignition or a toggle.
Good Day mate, thanks for time on great video 👍😊 mate can I use it for on Diesel engine ? Cheers
Hello! The electricity works the same way on a diesel, so the relay circuitry should be the same! Good luck on your project and thanks for watching the video!
This has to be the best video I have ever seen. Nice work!
Wow! Thank you!!!
If I’m running a HP fuel pump AND a LP lift pump. Do I just have th few same wiring? Just twice running along side?
So can I wire a trigger wire to a toggle switch and the directly to the battery?
You can, but you need to remember to turn it on and off, and you need to make sure your fuel pressure regulator is working properly so that you don’t flood the engine when it’s not running. Good luck with the project and thanks for watching!
@@WiringRescue cool cool, appreciate the help!
do I keep it connected to the harness or do I take out the relay and make its own harness? Any help is helpful
Great video. I follow for your work.👍🏻
Thank you! I appreciate you watching!
If I want to bypass the fuel pump relay entirely, which two wires do I need to connect with a jumper wire?
I have a question, I just don’t want to mess things up, trigger wired is it the same as signal. I have an 85 Pontiac Fiero the cables got burn so I need to Rewired the fuel pump.
To the point, clear and concise. Best treatment I've watched.
Thank you! I appreciate the kind words!
If you wanted to have a hobb switch activate the secondary pump would you just run the trigger wire (86) to the NC on the Hobb Switch then once the pressure is reached it will close the circuit?
This might get my Z back up and running!! 😦🤞🏽
If I run this relay do I disconnect the factory relay?
@@dwight_boi - you absolutely can. Or you can use the factory fuel pump feed wire to power pin 86 on the new relay. That way the new relay is controlled with all the factory key-on controls. That is assuming your factory setup works, which is seems like it may not. So - yeah, I’d probably just ignore all the factory stuff and do this setup instead.
@@WiringRescue IT WORKED!! Got my Baby up and running!! Thank you!!
Did you put a switch?
@@aammadmustafa5985 yup! Just a simple on / off switch
Can I use all 14g wires for everytning ? I’ kee blowing fuse I have the same set up as u but running only one fuse for the switch and the 30mins
So I’m adding a relay finally after a year later of having the bigger pump installed. Only one part remains of the install I’m not sure what to do with and that the old ground to my factory wiring?
See I’m using two new terminal posts basically I made thru my hangar. I’ve inserted two new studs to use as my positive and negative so I no longer supply and power thru the cars factory small connectors. If I splice into the existing positive lead on my cars harness to you as the new relays trigger on 86 and then 87 connects to my new positive stud terminal i made and the I also ground my pump with the new termninals to the chassis. Now don’t I still need to them ground the factory harness original negative lead to complete the circuit to have it do what I need and he original wires to do, which is to trigger on my new relay ?