Automotive style relays WITH socket and short wire harness amzn.to/32qyOlV WATERPROOF automotive style relays with socket and short wire harness amzn.to/39beJBp Thanks for watching! As an Amazon Associate I earn from qualifying purchases
I have watched this video several times, and even tho I already knew this information and have used it, I still enjoy watching your video. LOL Very crisp and clean. To the point and accurate information. Thank you for making and uploading it.
Very good video, this is also called a negative trigger and can be used to reduce the number or wires going to the relay, it is also safer for certain applications
Yes sir.... If I'm not mistaken, I believe I used the term "negative trigger" in the video but I haven't watched it for a while so I could be wrong. Thanks for the compliment, and thanks for the comment!
I fitted a aftermarket remote locking kit and your video was a big help in getting the window closure function working and a free lesson in relay function and wiring 👌
this is helpful! I'm looking at a project on my car and output is negative and needed to interrupt a 12v power source and was stumped on how a relay could do this for me. I thought this would be how it was done and I was correct!
I have a problem with my setup, First i wanted to have a trunk popper, but i used the schematic you done and the relay only triggers when the alternator is running. 14.something volts????? Its coming from a live 12v source. So i went out of my way and bought a second relay, and this second relay gives a really weak clicking sound, and doesn't pop the trunk, not even when the car is running? I'm out of ideas....
Thank-you, just what I needed. I understood it all until after you connected a positive wire source, then the next wire... didn't get what that one is. In the video it lies parallel to the positive. Thanks! Who can explain this to me a newby ?
Thanks for this video! I was playin hell tryin to figure out how to wire up some underhood lights with a jamb switch. And BAM! it works. Thanks again bud
@@SlipFitGarage i played for almost 3 days, tryin to get it figured out! My 05 Tahoe has 0 underhood light, but I've always had GM, and they always had lights underhood. So I've got 2 rocklights that I'm using for that. Thanks bud!
Mine keeps blowing fuses smh it only turns my phone on when I put 86 to 30 it’s wierd is only my fans turn on and won’t blow a fuse but then 86 pin is open I need help.
Can you splice the two 12 volt sources coming from the relay together and run them as one wire to a fuse or breaker before the battery instead of running two separate wires i.e. 12v constant and 12v switched since the ground is in essence becoming the 12v switched?
Ok. I have a dpdt switch for forward and reverse on my 130 VDC 4.25 hp treadmill motor. It just changes polarity going to the motor. I want some low voltage low amp LED lights to come on depending on the direction. Green for forward and yellow for reverse. I can’t just connect the LED’s directly to the motor current so I need a switch that senses the polarity going to the motor and opens or closes to let my low voltage dc power activate my LED’s. I have no idea how to do this. But you look like a guy who might be able to help. Thanks, Paul
I have an electronic ball valve which has 3 wires. Pos, Neg, and Switched. If I connect the "switched" to the "Pwr +" side, the valve opens. If I connect it to the "Grn/Neg -" side the valve closes. I have a control source that is either ON or OFF. I need to wire the valve so that when my control source turns on, the valve will open and when the power is off, it closes. Any suggestions??
Applying -12V to one side of the coil and +12V to the other side of a standard 12V automotive relay as advocated here is equivalent to applying a potential difference of 24 volts across the coil designed for 12 volts and will burn out the coil since it will cause twice the current to flow through the coil winding. Instead, connect the +12V side of the coil to ground and the relay will function as designed.
It's a simple DC coil..... on this style of relay the coil terminals are marked with #85 and #86. That's it. Polarity is irrelevant to energize the coil. If it mattered, the terminals would be marked with POS+ and/or NEG-, and they are not. Just like an old school incandescent 12V light build, polarity is neither marked on the bulb, or relevant to make it light up. Telling someone to apply 12 volt negative to the positive side of the coil isn't doing anyone any good if the terminals are not marked. The only time polarity matters when connecting the coil is when a relay has a built in diode to prevent the relay sticking on under inductive loads. Not all automotive style relays come with a diode. The relay in this video did not contain a diode. Thanks for the comment.
@@SlipFitGarage "If it mattered, the terminals would be marked with POS+ and/or NEG-, and they are not. " Yes you are correct. Usually when marked it's because they have an indicator light / LED or they have a flyback diode for EMF protection.
Um this may just be an oversight and I know it says 12v- but most likely it means 0V or Negative. And most likely he has a an alarm the literally says 12v- And why would they put it that way. Well that's because there may be other voltages and it need the 12v- OR because the unit is putting OUT 12v-. Two things Put your volt meter voltmeter pos lead to pos battery and neg lead to neg battery, you will read 12v Now reverse the leads, it says -12v What you are describing is when two totally separate power sources that are combined. Just look at PC power supplies that have 5v, -5V and 12v, -12v. If you combine the 5v and 12v you won't get 17v, why because they are sharing the commons.
The lights no longer flash on my keyless entry/ auto start module I was told it could be fixed if I Used a negative out when running wire instead and add a inverted relay to fix that? Is it possible for someone with limited experience to do. I'm confused because the white wire coming out for my lights of my module is positive I'm so lost
Trying to wire floor lights to dome on 01 civic ex. The dome has constant power and the switch adds the ground. All ports show pos until switch activates adding ground and turning on lights. Yes grounding side is powered until ground is put through via switch. Burn up 4 lights now trying to figure it out. Would this work or any ideas? My lights burn out running live power through until ground is added. Basically hooke up backwards both to power putting ground wire to powered side that switches. I dont like electrical or foreign cars... HELP PLZ
How wuld buzz coil relay look like ? Can you actualy reverse relay polarity to ither positive and negative ground? Culd the induction pick up ore pick up coil activate that relay? Im looking for dobel fiering options similar to waste spark ignition by just useing relays instead of ignition modules . Any help please?
Thank you, have a question how to wire led using negative outpost on the dome wire. Seem my dome is wired nagtive outpost like your video. Dome has option on, off, door I check the wire and it has power to the negative and no power to the postive end on the toggle dome pin. But has power to - and + on the dome bulb connector? My plan was to add a relay with the led and use the dome switch as the toggle. 30 to fuse box, inline fuse, battery. 87 to distribution block to acc(led). 85 to ground and 86 dome switch + positive. I was going to wire like above, but then after watching your video I think I might have to rewire the relay. Any suggestions?
I have a fuel relay switch that is negative for continuity, so from the start I can not use this relay. Could I change it to constant positive to a low the fuel pump to kick on. Would that in return create a constant load on my battery? Is there a way to fix the relay ? Thank you. This relay is very hard to find.
I'm not understanding why you can't use this relay for a fuel pump? Also, these relays are NOT hard to find at all! In fact, they the most common relay found in the automotive aftermarket. These relays can be purchased at EVERY parts store in the USA, or any automotive parts website on the internet. There are thousands of listings for these relays on Amazon.
Will this work for changing the polarity of a starter motor from a Trombetta solenoid? Looking to have it turn CCW versus CW to make our engine turn over properly
If I understand you correctly..... If you want the light to turn OFF when the negative is APPLIED..... just switch the wire from the 87 terminal, to the 87A terminal in the center of the relay.
Thank you for this Video! What if the -12V is variable? For example the aftermarket alarm gives -12V for normal function (lets say to power a bulb) and -8V for dimming functionality?
Hi Brian, I need some help getting my head around an aftermarket android stereo with climate control I installed in my car. All the functions in the climate control works except for the rear window defroster. I was told that the canbus controls it. I tried different canbus settings but nothing worked. Long story short, what I discovered is that there is no wire that connects the switch for rear window defroster and wire in the harness. I was able to locate the pin that turns on the wire rear window defroster, connected the wire but still does not work. I checked the voltage on the wire and pins from the switch and both show 12 v. I think If I change the polarity like you have shown in the video it should trigger the rear window defroster. How can I identify 12v- from the switch? Do you think adding a relay like you show in the video would solve my issue? I apologize for the descriptive question.
I can't answer your question specifically without seeing it in person. However, as far as how you would identify negative 12 volts.... you need to use a Multimeter. With a digital multimeter, if you connect the red test lead to positive, and the black test lead to negative, It should read somewhere around 12 volts. But if you put the red test lead on the negative and the black test lead on the positive, it will read -12 volts. There should be a "-" in front of the 12vdc on the meter display. That is how you detect polarity with a meter.
Great video. I am planning on installing footwell lights.. can I connect the door switch wire ? Is it going to be positive switched relay or negative switched relay? The door switch has one wire and when door opens it’s grounded and lights come on…. Thanks.
Thanks for the compliment but I would have absolutely no idea about the wiring in your vehicle without seeing it in person. Sorry I'm not able to answer your question.
Can you make a video explaining or just explain here in the comments how to change polarity from a positive output to a negative output just the opposite as the video? I am a beginner I just need a little clarification and help thanks in advance!
thank you so much for the video. i found this while researching how to do the complete opposite. my alarm's remote start feature outputs a positive signal but my bike uses a negative circuit on its electric start (confirmed by connecting a bulb to my alarms remote start wire and the negative on the bikes battery and trying to start off my fob) i know im going to sound stupid as i bet its really easy to do but if you possibly have the time could you explain what changes i would make using your diagram in your video if i used a 4 pin relay please? alarm remote start wire = BLUE input wire of my starter relay is RED/WHITE many thanks again paul
hi there, so where do you put the switch in that, as i have a old 24v curcuit for rear spot lights, the red wire to the dash switch has power going to the switch, huge job to run new wire back through the truck just to put it into a relay, as im putting in new led powered switch, love your videos, thank you chris
@@johnguthrie7233 What "reply" are you talking about? Did you mean to type "replay".... or did you mean to type "relay"??? Either way, RUclips does not allow video creators to edit the video once it's been uploaded to youtube. What you see is what you get. I have no way to change what you see in the video. Sorry. Merry Christmas
Hi lessco I have a mach 1 1973 and instal msd ignition box with coil and disturbuter on it but i have a problem.there is a( -negative)yellow wire from box that´s for tachometer and when i connect it to my tacho nothing happening because the mustang tachometer work with +positive from coil.my question is "can i use your method with relay to convert negative signal to positive and run my tachometer?"
will this work for a reverse camera with reverse polarity on the reverse light such as with a ford 2004 escape thanks for your replies if anyone would know.
If you removed the LED light bulb in my example shown in this video, and wired your camera in its place, would the camera work? If so, then yes it should work for what you're trying to do.
You can get your constant positive 12 volts from wherever you like. Just remember.... one of those constants only needs to supply a small amount of current to the coil (magnet) inside the relay, the other constant needs to supply the full current load to whatever device you're trying to run with the relay. If this is a high current load such as electric fans or halogen lighting, you need to make sure all the wire gauge and fuses leading up to the "switch" side of the relay (terminals 87, 87A, 30) can handle the full load. Wire gauge and fuses that operate the coil (magnet) inside the relay (terminals 85, 86) can be rated for far less current because the typical ISO, or Bosch style automotive relay coil (magnet) typically draws only 200mA or less. (0.2.... or, 2 tenths of 1 amp.). But just remember EVERYTHING coming directly from a battery needs to be fused, not just the high current wire going to terminal 30 (or 87, 87A). Even the wire going to the low current coil (magnet) inside the relay (terminals 85, 86) can get rubbed through on bare metal and burn your car down if it's not fused. Hope this helps.... good luck with your project!
Theoretically, instead of an electronic signal of -12v (or any current really) could this same approach be used with something like an audio signal, which is constant but of varying strength?
NO. Audios is a wave which is AC. If you did that it would be turning on that relay on and off. You would have to convert it back to DC. With a rectifier and maybe even a capacitor. But if you want it to be turning on and of, you are better off using a solid state relay or use mosfets.
HI BRIAN IM TRYING TO USE 2 RELAYS TO CONTROL THU AN ALARM KEYLESS CONTROL FOR MY VW T4.I HAVE THE ACTUATOR MOVING SOMETIMES BUT NOT ALWAYS IN AND OUT TO WORK THE DOOR LOCK.I HAVE RELAYS SET UP TO A NEW ALARM ON MY LIVING ROOM FLOOR WITH 12V BATTERY AND A SPARE ACTUATOR SAME AS ONE IN MY VAN.STEREO KING SAYS 12V POSITIVE WAS FROM 87A I THINK WHEREAS ANOTHER GUY SAYS GROUND THEM.DEPENDS ON WHAT POLARITY I SUPPOSED.BEEN TOLD MY VAN IS 12V POSITIVE VW T4 AND ONLY 2 WIRES CONNETCED IN DRIVERS DOOR.PROBLEM IS CENTRAL DOOR LOCKING STOPPED WORKING IN VAN WAS OK FOR 12 MONTHS AFTER STEREO GUY FITTED IT .AFTER CHECKED ALL FUSES OK APART FROM ALARM FUSE TO SIREN HAS BLOWN I REPLACED BUT BLOWS AAIN WHEN ALARM ACTIVATED.FUSE ON WHITE WIRE TO SIREN.12VOLTS TO BATTERY OK ONE SIDE FUSE OTHER SIDE TO AALRM.ANYWAY GOT NEW ALARM KEYLESS RIGHCLICK 301 FOR MY VW T4 WANT SEE IF WILL WORK DOORS
Hi Brian! I think I'm really close to a solution to my problem of reversed polarity to 1157 sockets in my electric scooter, where the body of the bulb gets the (+) charge and the bottom contacts have a (-) charge. This won't work with LED bulbs! It was suggested to me to use two SPDT relays to switch the polarity to the socket. I don't quite understand the diagram, and I would have to try it to see how it works. My question to you is: can I use DPDT switches to accomplish the same result without the current loss with the use of relays? There are 3 sockets I have to reverse. I can provide the diagram if needed.
After re-reading your question, I think I misunderstood it originally. If you need to reverse polarity on a light bulb socket, can't you just cut the two wires and switch them around? That would be easier than dealing with switches and relays.
That is an easy fix for a single function bulb. My dilemma involves dual function tail/brake lights and a high/low beam head light. how would you switch two negative wires and one positive to two positives and one negative?
Automotive style relays WITH socket and short wire harness
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WATERPROOF automotive style relays with socket and short wire harness
amzn.to/39beJBp
Thanks for watching!
As an Amazon Associate I earn from qualifying purchases
I have watched this video several times, and even tho I already knew this information and have used it, I still enjoy watching your video. LOL Very crisp and clean. To the point and accurate information. Thank you for making and uploading it.
Wow, thanks for the kind words. I do appreciate it. I'm glad you liked it!
Very good video, this is also called a negative trigger and can be used to reduce the number or wires going to the relay, it is also safer for certain applications
Yes sir.... If I'm not mistaken, I believe I used the term "negative trigger" in the video but I haven't watched it for a while so I could be wrong. Thanks for the compliment, and thanks for the comment!
i like how you explained the replay pins... never thought of it that way and it makes it so easy to understand. thank!
Thank you for the positive comment. Im glad the video helped you.
@@SlipFitGarage🙄🤔
This is exactly what I needed to see
Well, I needed this, thank you. I think the pins on the diagram are connected differently. I put together how you presented and works
Glad it helped!
This is gold, thanks for the knowledge
Thank you!
Best relay circuit walk through ever 👍
Thanks for the comment. 🙂
I fitted a aftermarket remote locking kit and your video was a big help in getting the window closure function working and a free lesson in relay function and wiring 👌
@@ALPINA527
That's awesome to hear. I am glad the video was helpful to you. Again, thanks for the comnent. 🙂
Awesome video easy to understand after watching this video
Thank you. 🙂
this is helpful! I'm looking at a project on my car and output is negative and needed to interrupt a 12v power source and was stumped on how a relay could do this for me. I thought this would be how it was done and I was correct!
Great. Glad the video was helpful. Thank you.
I would like to thank you so very much. I have been trying to figure out how to wire this up for a week.... excellent video !!!! Two thumbs up !!!!
Thank you...
Exactly what I needed. Thanks
Thanks for the comment!
Nice video. Have to try this on my bike.
Thank you!
Good demonstration on relays!
Thank you.
I have a problem with my setup, First i wanted to have a trunk popper, but i used the schematic you done and the relay only triggers when the alternator is running. 14.something volts????? Its coming from a live 12v source. So i went out of my way and bought a second relay, and this second relay gives a really weak clicking sound, and doesn't pop the trunk, not even when the car is running? I'm out of ideas....
Thanks helped!
Glad it helped!
Thank-you, just what I needed. I understood it all until after you connected a positive wire source, then the next wire... didn't get what that one is. In the video it lies parallel to the positive. Thanks! Who can explain this to me a newby ?
Thanks for this video! I was playin hell tryin to figure out how to wire up some underhood lights with a jamb switch. And BAM! it works. Thanks again bud
Glad the video helped.... thank you, sir!
@@SlipFitGarage i played for almost 3 days, tryin to get it figured out! My 05 Tahoe has 0 underhood light, but I've always had GM, and they always had lights underhood. So I've got 2 rocklights that I'm using for that. Thanks bud!
@@howeyfeltersnatch7702
Thats a great idea for under hood lighting. 👍
@@SlipFitGarage thanks man! I super glued some strong baby neo magnets to the back, and left the wire a lil long. So I can kinda move them around
Great video. Just wired up a relay for my aoogah horn!!
Thank you!
Great explaining thx 😊😊
You're welcome... Thank you!
Mine keeps blowing fuses smh it only turns my phone on when I put 86 to 30 it’s wierd is only my fans turn on and won’t blow a fuse but then 86 pin is open I need help.
Can you splice the two 12 volt sources coming from the relay together and run them as one wire to a fuse or breaker before the battery instead of running two separate wires i.e. 12v constant and 12v switched since the ground is in essence becoming the 12v switched?
Also curious about this I can't think of any reason why it wouldn't work.
Great video well explained new subscriber
I'm glad the video helped. Thanks for the compliment. Welcome aboard!
I have 2 water valves that are opened and closed via reversed polarity. Is it possible to acheive this with a relay setup similar to this?
Amazing tutorial
Thank you. 🙂
Thanks, big help.
You're welcome. Thanks for the comment.
@@SlipFitGarage thanks
Ok. I have a dpdt switch for forward and reverse on my 130 VDC 4.25 hp treadmill motor. It just changes polarity going to the motor.
I want some low voltage low amp LED lights to come on depending on the direction.
Green for forward and yellow for reverse. I can’t just connect the LED’s directly to the motor current so I need a switch that senses the polarity going to the motor and opens or closes to let my low voltage dc power activate my LED’s. I have no idea how to do this. But you look like a guy who might be able to help.
Thanks,
Paul
I have an electronic ball valve which has 3 wires. Pos, Neg, and Switched. If I connect the "switched" to the "Pwr +" side, the valve opens. If I connect it to the "Grn/Neg -" side the valve closes. I have a control source that is either ON or OFF. I need to wire the valve so that when my control source turns on, the valve will open and when the power is off, it closes. Any suggestions??
Applying -12V to one side of the coil and +12V to the other side of a standard 12V automotive relay as advocated here is equivalent to applying a potential difference of 24 volts across the coil designed for 12 volts and will burn out the coil since it will cause twice the current to flow through the coil winding. Instead, connect the +12V side of the coil to ground and the relay will function as designed.
It's a simple DC coil..... on this style of relay the coil terminals are marked with #85 and #86. That's it. Polarity is irrelevant to energize the coil. If it mattered, the terminals would be marked with POS+ and/or NEG-, and they are not. Just like an old school incandescent 12V light build, polarity is neither marked on the bulb, or relevant to make it light up. Telling someone to apply 12 volt negative to the positive side of the coil isn't doing anyone any good if the terminals are not marked. The only time polarity matters when connecting the coil is when a relay has a built in diode to prevent the relay sticking on under inductive loads. Not all automotive style relays come with a diode. The relay in this video did not contain a diode. Thanks for the comment.
@@SlipFitGarage "If it mattered, the terminals would be marked with POS+ and/or NEG-, and they are not. "
Yes you are correct. Usually when marked it's because they have an indicator light / LED or they have a flyback diode for EMF protection.
Um this may just be an oversight and I know it says 12v- but most likely it means 0V or Negative. And most likely he has a an alarm the literally says 12v- And why would they put it that way. Well that's because there may be other voltages and it need the 12v- OR because the unit is putting OUT 12v-.
Two things
Put your volt meter voltmeter pos lead to pos battery and neg lead to neg battery, you will read 12v
Now reverse the leads, it says -12v
What you are describing is when two totally separate power sources that are combined. Just look at PC power supplies that have 5v, -5V and 12v, -12v. If you combine the 5v and 12v you won't get 17v, why because they are sharing the commons.
It works... But I think it is not soo much efficient in working for conversation of Positive to Negative
excellent video
Thank you, Sir! 🙂
The lights no longer flash on my keyless entry/ auto start module I was told it could be fixed if I Used a negative out when running wire instead and add a inverted relay to fix that? Is it possible for someone with limited experience to do. I'm confused because the white wire coming out for my lights of my module is positive I'm so lost
Trying to wire floor lights to dome on 01 civic ex. The dome has constant power and the switch adds the ground. All ports show pos until switch activates adding ground and turning on lights. Yes grounding side is powered until ground is put through via switch. Burn up 4 lights now trying to figure it out. Would this work or any ideas? My lights burn out running live power through until ground is added. Basically hooke up backwards both to power putting ground wire to powered side that switches. I dont like electrical or foreign cars... HELP PLZ
How wuld buzz coil relay look like ? Can you actualy reverse relay polarity to ither positive and negative ground?
Culd the induction pick up ore pick up coil activate that relay?
Im looking for dobel fiering options similar to waste spark ignition by just useing relays instead of ignition modules .
Any help please?
Thank you, have a question how to wire led using negative outpost on the dome wire. Seem my dome is wired nagtive outpost like your video. Dome has option on, off, door I check the wire and it has power to the negative and no power to the postive end on the toggle dome pin. But has power to - and + on the dome bulb connector? My plan was to add a relay with the led and use the dome switch as the toggle. 30 to fuse box, inline fuse, battery. 87 to distribution block to acc(led). 85 to ground and 86 dome switch + positive. I was going to wire like above, but then after watching your video I think I might have to rewire the relay. Any suggestions?
Am I right if I put the 86 to the - off the dome switch pin it will work?
I have a fuel relay switch that is negative for continuity, so from the start I can not use this relay. Could I change it to constant positive to a low the fuel pump to kick on. Would that in return create a constant load on my battery? Is there a way to fix the relay ? Thank you. This relay is very hard to find.
I'm not understanding why you can't use this relay for a fuel pump? Also, these relays are NOT hard to find at all! In fact, they the most common relay found in the automotive aftermarket. These relays can be purchased at EVERY parts store in the USA, or any automotive parts website on the internet. There are thousands of listings for these relays on Amazon.
Switchable grounds? Is this the same idea?
Will this work for changing the polarity of a starter motor from a Trombetta solenoid? Looking to have it turn CCW versus CW to make our engine turn over properly
That's what a Trombetta relay does, reverse electric motors. The relay shown in this video cannot handle the amperage of a typical starter motor.
So use this to switch my fan from neg ground to pos ground? and that's all. puller to a pusher.
You don't need a relay to reverse polarity on an electric fan..... just flip the two wires around that feed the fan. Easy.
Can the bulb be turned off in the same way? So when we bring a minus, it turns off the power to the bulb. If he can, please explain
If I understand you correctly..... If you want the light to turn OFF when the negative is APPLIED..... just switch the wire from the 87 terminal, to the 87A terminal in the center of the relay.
Thanks
I’m trying to add a lock actuator to my 12 ram factory lock/alarm system would this work too ?
How can I connect a two speed cooling fan but it runs with negative post?
is a 12v accessory wire normally fused? There is one in my 02 accord that I was thinking of tapping into, it is located in the ignition harness.
Thank you for this Video! What if the -12V is variable? For example the aftermarket alarm gives -12V for normal function (lets say to power a bulb) and -8V for dimming functionality?
Do you need separate relay for the lock and unlock wires?
Well explained...
Hi Brian, I need some help getting my head around an aftermarket android stereo with climate control I installed in my car. All the functions in the climate control works except for the rear window defroster. I was told that the canbus controls it. I tried different canbus settings but nothing worked. Long story short, what I discovered is that there is no wire that connects the switch for rear window defroster and wire in the harness. I was able to locate the pin that turns on the wire rear window defroster, connected the wire but still does not work. I checked the voltage on the wire and pins from the switch and both show 12 v. I think If I change the polarity like you have shown in the video it should trigger the rear window defroster. How can I identify 12v- from the switch?
Do you think adding a relay like you show in the video would solve my issue? I apologize for the descriptive question.
I can't answer your question specifically without seeing it in person. However, as far as how you would identify negative 12 volts.... you need to use a Multimeter. With a digital multimeter, if you connect the red test lead to positive, and the black test lead to negative, It should read somewhere around 12 volts. But if you put the red test lead on the negative and the black test lead on the positive, it will read -12 volts. There should be a "-" in front of the 12vdc on the meter display. That is how you detect polarity with a meter.
Great video. I am planning on installing footwell lights.. can I connect the door switch wire ? Is it going to be positive switched relay or negative switched relay? The door switch has one wire and when door opens it’s grounded and lights come on…. Thanks.
Thanks for the compliment but I would have absolutely no idea about the wiring in your vehicle without seeing it in person. Sorry I'm not able to answer your question.
Can you make a video explaining or just explain here in the comments how to change polarity from a positive output to a negative output just the opposite as the video? I am a beginner I just need a little clarification and help thanks in advance!
thank you so much for the video. i found this while researching how to do the complete opposite. my alarm's remote start feature outputs a positive signal but my bike uses a negative circuit on its electric start (confirmed by connecting a bulb to my alarms remote start wire and the negative on the bikes battery and trying to start off my fob) i know im going to sound stupid as i bet its really easy to do but if you possibly have the time could you explain what changes i would make using your diagram in your video if i used a 4 pin relay please?
alarm remote start wire = BLUE
input wire of my starter relay is RED/WHITE
many thanks again
paul
hi there, so where do you put the switch in that, as i have a old 24v curcuit for rear spot lights, the red wire to the dash switch has power going to the switch, huge job to run new wire back through the truck just to put it into a relay, as im putting in new led powered switch, love your videos, thank you chris
Great video but you metion the terminal numbers on reply
Not sure what you're saying.... What do you mean when you say... "you mention terminal numbers on reply"?
Show the numbers on the reply close up shot @SlipFitGarage
@@johnguthrie7233 What "reply" are you talking about? Did you mean to type "replay".... or did you mean to type "relay"??? Either way, RUclips does not allow video creators to edit the video once it's been uploaded to youtube. What you see is what you get. I have no way to change what you see in the video. Sorry. Merry Christmas
Hi lessco
I have a mach 1 1973 and instal msd ignition box with coil and disturbuter on it but i have a problem.there is a( -negative)yellow wire from box that´s for tachometer and when i connect it to my tacho nothing happening because the mustang tachometer work with +positive from coil.my question is "can i use your method with relay to convert negative signal to positive and run my tachometer?"
I don't believe that will work. The mechanical contacts inside the relay probably cannot open and close quick enough to operate a tachometer.
will this work for a reverse camera with reverse polarity on the reverse light such as with a ford 2004 escape thanks for your replies if anyone would know.
If you removed the LED light bulb in my example shown in this video, and wired your camera in its place, would the camera work? If so, then yes it should work for what you're trying to do.
Can both my constants be directly from the battery? With terminal “30” fused off course
You can get your constant positive 12 volts from wherever you like. Just remember.... one of those constants only needs to supply a small amount of current to the coil (magnet) inside the relay, the other constant needs to supply the full current load to whatever device you're trying to run with the relay. If this is a high current load such as electric fans or halogen lighting, you need to make sure all the wire gauge and fuses leading up to the "switch" side of the relay (terminals 87, 87A, 30) can handle the full load. Wire gauge and fuses that operate the coil (magnet) inside the relay (terminals 85, 86) can be rated for far less current because the typical ISO, or Bosch style automotive relay coil (magnet) typically draws only 200mA or less. (0.2.... or, 2 tenths of 1 amp.). But just remember EVERYTHING coming directly from a battery needs to be fused, not just the high current wire going to terminal 30 (or 87, 87A). Even the wire going to the low current coil (magnet) inside the relay (terminals 85, 86) can get rubbed through on bare metal and burn your car down if it's not fused. Hope this helps.... good luck with your project!
Thanks for the great informational video.. How would I use this concept to use on a actuator reverse polarity chicken door? Thanks
I'm not familiar with chicken doors. Sorry.
Theoretically, instead of an electronic signal of -12v (or any current really) could this same approach be used with something like an audio signal, which is constant but of varying strength?
NO. Audios is a wave which is AC. If you did that it would be turning on that relay on and off. You would have to convert it back to DC. With a rectifier and maybe even a capacitor.
But if you want it to be turning on and of, you are better off using a solid state relay or use mosfets.
Can i use this to to lock and unlock power locks
Yes. I have used this method myself to operate power locks from an aftermarket remote start system.
@@SlipFitGarage thank u
HI BRIAN IM TRYING TO USE 2 RELAYS TO CONTROL THU AN ALARM KEYLESS CONTROL FOR MY VW T4.I HAVE THE ACTUATOR MOVING SOMETIMES BUT NOT ALWAYS IN AND OUT TO WORK THE DOOR LOCK.I HAVE RELAYS SET UP TO A NEW ALARM ON MY LIVING ROOM FLOOR WITH 12V BATTERY AND A SPARE ACTUATOR SAME AS ONE IN MY VAN.STEREO KING SAYS 12V POSITIVE WAS FROM 87A I THINK WHEREAS ANOTHER GUY SAYS GROUND THEM.DEPENDS ON WHAT POLARITY I SUPPOSED.BEEN TOLD MY VAN IS 12V POSITIVE VW T4 AND ONLY 2 WIRES CONNETCED IN DRIVERS DOOR.PROBLEM IS CENTRAL DOOR LOCKING STOPPED WORKING IN VAN WAS OK FOR 12 MONTHS AFTER STEREO GUY FITTED IT .AFTER CHECKED ALL FUSES OK APART FROM ALARM FUSE TO SIREN HAS BLOWN I REPLACED BUT BLOWS AAIN WHEN ALARM ACTIVATED.FUSE ON WHITE WIRE TO SIREN.12VOLTS TO BATTERY OK ONE SIDE FUSE OTHER SIDE TO AALRM.ANYWAY GOT NEW ALARM KEYLESS RIGHCLICK 301 FOR MY VW T4 WANT SEE IF WILL WORK DOORS
HOPEFULLY YOU GET YOUR ISSUE FIGURED OUT. THANKS FOR THE COMMENT.
brianok100 Thsnks I’ve managed to get 2 of my van doors locking .so hopefully just need to splice in another wire to get the other 2doors locking 😀
I have problem with my honda power window going down but not up. It is because of bad relay?
it's the switch or the window motor
@@GSPOT954 I open small relay there is two small parts in relay one not working
Smart content 👍 idol
Thank you!
Great video but next time u should mention pin names .
Can we it also reverse from positive to negative?
Sure, just wire it the opposite way...
How you will use PWM signal in relay
Welcome to comment box
I don't use PWM with the relay. Not with this kind of relay....
Hi Brian!
I think I'm really close to a solution to my problem of reversed polarity to 1157 sockets in my electric scooter, where the body of the bulb gets the (+) charge and the bottom contacts have a (-) charge. This won't work with LED bulbs! It was suggested to me to use two SPDT relays to switch the polarity to the socket. I don't quite understand the diagram, and I would have to try it to see how it works. My question to you is: can I use DPDT switches to accomplish the same result without the current loss with the use of relays? There are 3 sockets I have to reverse. I can provide the diagram if needed.
Hello. Yes, it does work with LED bulbs..... that was an LED that I used in the video demonstration.
After re-reading your question, I think I misunderstood it originally. If you need to reverse polarity on a light bulb socket, can't you just cut the two wires and switch them around? That would be easier than dealing with switches and relays.
That is an easy fix for a single function bulb. My dilemma involves dual function tail/brake lights and a high/low beam head light. how would you switch two negative wires and one positive to two positives and one negative?
An oat put?
yes
Electromagnetic coil
RUclips comment.
I was thinking... I could use it to change positive and negative position 60 times per second. Thus will result in a AC.
lol, you could. Good luck!
Uh?
Oh?