How To Wire Electric Fuel Pump Relay / Bypass / Rewire / Hardwire Upgrade
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- Опубликовано: 29 сен 2024
- In this video, I show how a fuel pump relay works and how to bypass yours. I also show how to rewire your fuel pump for an upgraded fuel system or race car. Aftermarket 5 pin bosch style fuel pump relays can easily be wired into any car and made to work with nearly any electric fuel pump scenario you can come up with. This info could apply to any Bosch 044 style pump, AEM external pumps, or even a Walbro 255 fuel pump.
Pin 30 - Incoming 12v to relay from battery
Pin 87 - Outgoing from relay to electric fuel pump power.
Pin 85 - Ground
Pin 86 - Trigger wire to turn on the fuel pump relay. Can be connected to a toggle switch, the ignition switch, or connected to the factory fuel pump relay wiring.
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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
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!
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.
Like how you explain everything, I'm your new subscriber now 👍
Thank you! I appreciate every subscriber I earn!
Great advice
Thanks! I’m glad you like the video!
Nice bro, you help me 🤘
By the way, this is safe?
Question plz...from my understanding you only need .5 to 1 Amp fuse for a trigger wire...what if you want to use let's say 3 relays to trigger off one wire...how would u run that and what amperage fuses?
This is how I decide what fuse sizes to use ruclips.net/video/EhzN6UdnmPA/видео.html
i have a question,i have take a fuel pump into my bike and can the fuel pump take under pressure the needle,and the carbs can overflow ?
An electric fuel pump can easily overpower a float needle causing the carb to overflow. They do make fuel pumps for carburetors though that flow much lower pressures though. I would recommend looking into those. Thanks for watching!
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?
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.
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!
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
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!
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!
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.
Does this mean I can wire up 3 fuel pumps to my car turn one on to run the car normal and when am ready to let her eat just turn on the 2nd and 3rd pump and bring up my fuel pressure to the required amount to bring out the 850-900 pony’s in her? I get that I would have to wire up each pump separate
Yes! - that is totally correct. You’ll also want to make sure your fuel pressure regulator can handle 3 pumps! Good luck with the project!
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.
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!
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.
What size fuzes
Hey guys. I don’t know anything about wiring and I’m having a catastrophe with the wiring the previous owner did. Anyways I want to copy this setup in the video but I don’t know where the relay would go into. If someone could explain to me where I would plug that relay in that would be great. Hell maybe even explain what a relay is cause I’m friggin clueless.
This video explains the basics of a relay. Once you understand what it does, the fuel pump circuit will make more sense. ruclips.net/video/QCkfFCLa_Jg/видео.html
@@WiringRescueThank you so much! Both of the videos have been such a huge help with the fuel pump wiring catastrophe the previous owner did. You’re the best man!
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!
That switch can also act like a kill switch too in a way since the car needs fuel to start and without fuel it won't start.
Great point! It makes an awesome kill switch!
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
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...
Can I put a electric fuel pump out side of the tank know it doesn't have one in the tank
Sure. They make external fuel pumps exactly for this purpose. Some require the pump to be lower than the fuel in the tank though. So be sure you mount it in a place where getting fuel to it won’t be an issue.
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 👍👍
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.
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
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.
My fuel pump and TPS work after bypassing between p30-p87... Tested p85-p86 using 9v battery and both, if not, all relays working after this test. Any idea what cause may be? Mitsubishi 4g93 H76W.
Just a fyi: the relay must be connected to the ground that originally went to the pump. Made the mistake of grounding the relay to vehicle chassis, and the pump wouldn't prime unless I jumped the battery. The pcm won't be able to energize the main relay because it doesn't see the ground 😅.
The pump itself can be grounded to chassis
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!
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 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.
Might be a dumb question but what fuse do I use? 😅
You’re in luck! I made a video to explain exactly this! Check it out - ruclips.net/video/EhzN6UdnmPA/видео.html
B E A utiful ! I love this presentation!
Thanks! I’m glad you liked it! Subscribe and I’ll make more!
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.
If my car's lift pump makes Abt 3 bar, can I upgrade it to 5 bar ? I bought 2 lift pumps that are supposed to make 3 bar, but the fuel rail only has 2 bar, and my car will smoke a bit but won't start it'll just cough
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,🙏🇿🇦
You don’t need 5 pin, you can use 4 pin instead. Why do you make things complicated ?
@00:27 seconds into this video, I explained that a 4-pin relay is totally fine to use, but I used a 5-pin relay because that is what I happened to have available at the time I made the video.
Everyone has a different way of learning, and if this video is too complicated, I would encourage you to find a different source of information that better suits your learning preferences.
@@WiringRescue mate I’m a car technician, I do most complicated wiring in vehicles this little rely is nothing for me but there are people who can’t get this so it’s better to make simple videos for them not to confuse them. But I do appreciate you taking your time making this great video.
I have carb engine and currently fuel pump is connected to key switch "ON" through a 20amp fuse. Now if I turn on AC in stationary car, the keep running and I think fuel is wasted (There is a return line from engine to carb and I think this line doesn't saves fuel it just burns fuel).
Please help me do something to save my fuel white car is stationary and AC is on
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
Why do you need the relay in the first place?
Relays allow smaller amperage rating switches to control larger amperages circuits. The switch turns on the relay, and the relay turns on the fuel pump. Sometimes the ‘switch’ could be a computer, and computers don’t like huge fuel pump amperages flowing through them. So you might have a very low amperage computer, that tells the relay to turn on and the relay does all the hard work of flicking on the large amounts of electricity going to your fuel pump. Your computer stays happy because it never has to work hard. Your relay loves doing the heavy lifting. Your fuel pump gets the proper amperage it needs.
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.
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!!
Mine keeps blowing Al types of fuses is wire the same I found the only solution to make it work was hot wire 86 to 30 and for some reason that’s turns my fan but pin 86 is open so I’m confuse I’m running 18guages for all grounds and 14 for everything else and fuses are 12 gauge
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.
I’m having an issue where I have everything line up the way shown but my switch is popping then proseeds to stop working but blowing no fuses
Please help me I’m not sure if I’m even supposed to use the relay it’s only two wires and I can’t get my head wrapped around it due to the terrible instructions I have been back and forth for two days now and I just can’t seem to get this and the company has abandoned customer service The instructions today orange wire pump used to activate fuel pump 12 V do not use this wire to power fuel pump static require over 15 A refer to your fuel pump manufacture amperage ratings I have I pump 11 A pumps use this wire to trigger a separate relay and use larger gauge wire to feed the pump we recommend 10 gauge the fuel pump also requires a ground wire which I have put in the other wire states the main read this output will provide a 12 V power supply from the main relay this wire is located approximately 32 inches from the ECU connectors I do not have a main relay I assume he’s talking about the fuel pump so where do they go
The same way ur using it I’m trying to use it for my fans and it keeps blowing my damn fuse I just don’t get it I’ve spend over 100$ on something that should’ve been simple … I really don’t get it I’ve tried all diff ways
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?
Ok I don’t everything in this video my relay clicks but the pump won’t come on
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 ?
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.
Need help. Pump wont run on 2.0tfsi. Did everything like explained
Hey my friend a have a question for you Do this harness Hu's to be connect with the computer of tha Vehicle??
No, it doesn’t, but you do need something to tell the relay to turn on. That could be an ignition switch or a toggle switch, or really any number of things.
Thank you so much
Happy to help! Good luck with the project!
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
I got a 96 civic replaced the fuel pump was fine but when it’s cold out it doesn’t work so it’s got me wondering if I should just do this skip all the nonsense just let forward to on position flip switch for fuel pump new power supply start car be on the way
So I have a 6 pin relay (old ass bmw) so this would in theory work? If I copy that setup and swap to a 5 pin or 4 pin relay
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!
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
Complimenti, ottimo video, secondo te è possibile aggiornare questo cablaggio con un potenziometro di flusso per la pompa?
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 :)
exactly the video I was looking for thanks🍻
Awesome! I’m glad that it helped you out!
I got the cable from relay number 86. To conect the togle swich. Can the othet side of the togle swich needs to be grounded or no. Or just connect to a powet source. Thanks
If I want to bypass the fuel pump relay entirely, which two wires do I need to connect with a jumper wire?
Awesome diagram for us visual/practical learners, thanks. What is the purpose of 87A? Is it for an alternate circuit sharing the ground (85) with 87? Does it trigger synchronously with 87 from 86 (on trigger, 87 and 87A both become high), or does it alternate state with 87 (ie, 87 high, 87A low, then 87 low, 87A high)?
Thank you! I actually made a video that answers exactly this question! Take a peek when you have a chance! ruclips.net/video/W2Mr2Zgv1Ck/видео.html
A 50y old car without ECU. How to connect the trigger wire to let the fuel pump only work when the engine is running? But not when the ignition is on.
So I have some electrical issue causing me to think about making it switch on but is it ok to leave it switched on or is it too much fuel pressure? Please help
Nicely done with the parts mounted on the board for a good visual learning experience.
Good video, if I want run two pumps can I use 87a,or 87 split In two cables?
1990 f150 primes with key on then off while cranking 🤕
Could you please do a turn single (pair L & R ) With a hazard switch all in one model . Please and thank you. ......keep up the good job .
I've gotten a few requests for this, so I'll add it to my video to-do list!
@@WiringRescue thank you very much 😅 sorry to bother you
Hi. Will it work in a motorcycle? The pulse come from spark unit. I have a Honda shadow 1100 vt 1985 and I can't find this supply. Thanks
The diagram itself will work, you just need to make sure the parts you are connecting are correct for the motorcycle. For example, a high volume car fuel pump may draw more amperage than some motorcycles can output.
Just to be noted. My vehicle uses a ground loop to the oil presser sensor. It does heat the pump on start also.
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!
I have 2 ecm’s one supplies power to the pump but doesn’t have spark. The other has spark but doesn’t supply power to pump. I hope this will work to supply power to the pump so I can drive my Jeep.
I hope it works too! Good luck, I’m cheering for you!
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!
If your ecu isn't work with the fuel pump can this still be done
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!
Hi Ratty.
My Bosch 044 pump is connected as per your video, I just have a problem pump overheating?!
I actually bought 2 pumps thinking they are faulty.
Supply wire is 2.5mm², ground is
1.5mm².
You need to know the amperage specs for the pump to determine the wire size and fuse size. Your ground and power wires should both be sized for the amperage draw of the pump. Fuel pumps also cool themselves with the fuel that flows through them. If you are running them dry it may burn them out. Your wires sound like they are too small, especially the ground. - Check out this video for more info on wire and fuse sizes. ruclips.net/video/EhzN6UdnmPA/видео.html
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
So I cut my wires out to my ecu for my fuel pump I want to wire my pump to my ignition should my fuel pump run consistently all the time
Jeremy could you add a circuit similar to this with an inertia cut out? As always your “mediocre “ site is great. Roger
Thanks for the kind words! I would think this is very possible! Maybe I'll see if I can get my hands on an inertia switch and make some videos with it. Looks like they are $10-20 on Amazon. Hmm. This could be fun!
I will have one sent. Tell me where. Roger
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!
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
So just like you said if we use switch like that wont that fuel pump goes hot isn't that the ecm sends thet current to fuel pump when it needs to start and turn off
Why my magic eye are ligthing when the mechanic do this to my van what is the problem?
Great video, do you have a video that explains how to wire dual relays to a selector valve for running dual fuel tanks?
Could you wire a Efan this way on a race car?
I actually made a video showing how to wire an electric fan. Here you go: ruclips.net/video/9Hj7Ri3TXhc/видео.html
@@WiringRescue yes I seen that one, and it's great info, but I like the simplicity on how the fuel pump is wired. Actually I'm using your FP video to do mine like it. I'm guessing it can be the same for the Efan? Thnx in advance keep up the great content 👍🏽
How do I know what wire to splice in the ignition switch for my trigger ?
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!
I have an old 1967 car. How can I make it so automatically switch the fuel pump off when in an accident. And heaven forbid I'm in a situation where I cant turn the switch off? Is this possible? Let's say when the motor stalls....
If you have an electric fuel pump, you can add an inertia switch. Here is a video on how to do that. ruclips.net/video/MHgMHE6TUG8/видео.html
What AMP fuses do you use ?
I actually made a video explaining how to choose the right size for your circuit. Here you go: ruclips.net/video/EhzN6UdnmPA/видео.html
For 86 for some reason I can get my ecu signal wire to tell the relay to turn the fuel pump so instead I’m going to have a on and off switch instead of looking for the issue correct?????
I have that same issue with my 97 Spyder GST and have the same question...
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!
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.