Questions tagged [relay]
Electrical device which, when energised by a small electrical current, safely switches a larger electrical current.
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questions
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1answer
45 views
Why does a relay not short the battery?
I am planning on hooking up a 4-pin relay to supply power to ignition coils on a motorcycle.
The on/off switch on the diagram below is the ignition switch operated by the key. Ignore the fact that ...
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1answer
42 views
Any benefits of a relay over a dead mans switch between two 12V batteries apart from preventing discharge of starter while car is off?
I am fitting a second "leisure" battery in my car. It will be a 12V 115-150Ah AGM lead acid battery for use when the engine isn't running with loads up to 500W, generously, in practice It will be 250W ...
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0answers
7 views
2002 Chevy impala
On my Impala the reverse lights and tag lamp are not working. I checked the fuses and they were good. How can do I know if the relay is bad. How do you test a relay.
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1answer
99 views
Indicators and speedometer don't work, hazard lights do - is this a problem of the flasher relay?
I've recently been working on my wife's car, a Holden Astra 2000, replacing the blower motor resistor.
Somehow, since doing this work, the indicators and speedometer have stopped working, yet the ...
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1answer
34 views
Mercedes E320 where is the starter relay
The ESP says it is malfunctioning. in a 2001 Mercedes e320, will that affect starting and where is the starter relay
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17 views
Alarm horn pulse too short for horn relay, horn sometimes doesn't blow
I just recently installed an aftermarket alarm on a 2002 ram 1500. The alarm is an Avital 3100lx. When testing the lock and unlock functions I noticed that sometimes the horn would not work when ...
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1answer
112 views
Location of Fuel Pump relay on '07 TSX
I'm having frequent hard starting issues & think the problem is the fuel pump relay. However, I have no idea where this is located, presumably under the dash somewhere.
Anybody?
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0answers
7 views
Toggle off and on circuit? [duplicate]
I would like to have a circuit of relay to light led bulb as load which will be on or off automatically just by toggle input switch.
For eg, when input is toggle on, and if relay was already off, the ...
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1answer
1k views
Ford Edge 2013 Right headlight not working - fuse okay
2013 Ford Edge SEL in Canada (DRL is the highbeam at lower voltage)
Right side light started, weeks ago, with flickering while the car was turning to start, but stops flickering and works fine ...
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0answers
36 views
Why might replacing the relays defer a startup problem for a few weeks?
I have a 2005 Honda Civic. At some point in the last 6 months, I have had trouble starting it (intermittently). It would crank as long as I tried, but the car won't start. Most occurrences occur when ...
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1answer
53 views
Automotive relay pin numbers
I have the following relay. The pins are numbered 1, 2, 3 and 5, rather than the more usual 85, 86, 30 and 87.
I would like the following confirmed:
1 = 85
2 = 86
3 = 30
5 = 87
Thanks
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24 views
Avital 2101L aftermarket remote unlock quit working
I have a Ford Ranger 2001 in which I installed an Avital 2101L remote locking system and actuators 5 years ago. It has been working flawlessly until today.
The actuators have quit responding to the ...
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1answer
108 views
Relays in series connection?
Can i connect 2 relays of the same specs and same coil voltage of 12 in series ie 86 of one relay to positive battery, it's 85 joined to 86 of the other relay and obviously the end 85 to ground??
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1answer
42 views
Why would overheating relays cause problems when trying to start a car?
I have a 2005 Honda Civic. At some point in the last 6 months, I have had trouble starting it (intermittently). It would crank as long as I tried, but the car won't start. Most occurrences occur when ...
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1answer
145 views
What should be the expected voltage on pin 30 of a starter relay?
I was doing some research about how a pin 30 works on a relay and basically it said that this should be wired through a fuse to the battery. I checked the voltage on the relay slot where the starter ...
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0answers
39 views
Relay coil resistance measurements?
My relay 5 pin has 12v 10 amps input rating. And, I measured its coil voltage with multimeter giving about 650 ohms. Now, I connect the relay to car battery 45 ah. Surprisingly, the current through 86 ...
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0answers
282 views
2014 Hyundai Tucson cooling fan not running
So our 2014 Hyundai Tucson (GDi) cooling fan doesn't seem to come on when it's hot or when the ac is on. The ac only blows cold when the car is moving and the car sometimes overheats when idling. I ...
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0answers
69 views
Mitsubishi Outlander 2012 ES / Hearing relay click sound from the back every time I press the brake pedal?
I just purchased a used Mitsubishi Outlander 2012 ES with leather seats and 4WD. I never sat in one before.
Is it normal to hear a relay click at the back of the vehicle every single time I press on ...
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31 views
Flasher Relay Wiring Diagram Help
This is a diagram for a flashing relay. Normally used for automotive, I'm curious if I can get it to work with my needs.
I want to be able to start and continue the flasher with a 12V output, and ...
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1answer
11 views
Retrofitting an aftermarket rear fog lamp
I am planning to add two rear fog lamps with a combined current draw of 0.66 amps at 13.2 volts, which translates to roughly 9 watts.
I can't really figure out how to run a wire from the trunk to ...
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0answers
11 views
1988 T-Bird clicking sound when key is on
I accidentally drained my battery so I charged it and went to drive it car died when I went to drive. Now it makes a loud clicking noise and won't stay running. I don't think I put a good charge to ...
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1answer
113 views
2002 Kia Spectra 1.8: No power to the control side of my fuel pump relay
I have isolated the issue to no power coming in to the relay coil. I am having issues finding a wiring diagram, or a pcm terminals wiring diagram to help me further troubleshoot the issue. I'm only ...
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2answers
56 views
2003 Mazda 3 AC Relay Won't Close
I have a 2003 Mazda 3 with a strange issue. The AC wasn't working, and I found that the relay wasn't closing when the button in the cabin was pressed. The actual relay is fine. I opened up the relay ...
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0answers
9 views
Jeep cherokee 2004 crd sport Immobilizer relay
i have a Jeep cherokee 2004 crd sport... I am looking for Immobilizer relay part number and position. It seems near impossible to find the info, there not even a 2004 haynes manual
regards
3
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1answer
131 views
1986 Corvette - ECM code 33 & 36
My vintage 1986 Corvette convertible recently developed a stumble that progressed to a no-run condition. It comes and goes sometimes starting but in a few minutes I get a SES (Service Engine Soon) ...
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0answers
583 views
Low beam headlights don't work. High work. Can't find the problem
Car: 2012 Ford Focus
The fuse location under the passenger compartment works - I tested. I don't know if it's the headlight relay, but my car manual does not show a location. Unless it's listed under ...
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2answers
71 views
Starting an automatic for the lazy mechanic
I have an ignition problem with my 1985 Mk1 Golf Cabriolet Automatic (1.6 EW engine). I was watching a YouTube video where the mechanic was testing the crank position sensor in on of these cars (it's ...
2
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1answer
409 views
Is it possible to charge a small auxiliary battery with the alternator?
I want to charge a small 22AH AGM auxiliary battery just to turn on some light signals. I would like this battery to be charged by the alternator while the car is running. The problem is: the battery ...
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2answers
839 views
Honda Jazz 2007 - One headlight not working when dipped. Same bulb for full beam is OK, other light for dipped is OK
I've recently come up against a problem where the RH headlight on my 2007 Honda Jazz does not work when dipped.
It is not a blown bulb, since the same bulb is used for full beam, which works.
I don'...
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0answers
171 views
Suzuki TU250X motorcycle only cranks when engine turned over by pushing in gear (electronic ignition)
I have a 2000 Suzuki TU250x. It's had a intermittent problem using the electronic ignition to start the bike. Turn the key, hold in the clutch, lift kickstand, click the fuel pump relay switch, hear ...
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0answers
52 views
Why would this happen:
If anybody could help me understand this behavior, I'd be grateful:
2003 R1 5PW, Fuel-injected, has an alarm/immobilizer fitted, doesn't report any fault codes:
Motorcycle would occasionally (three ...
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2answers
8k views
Wiring a 3 pin relay to power a dual horn from a stock switch (single-horn)
I am trying to implement a dual horn setup for my bike. The stock came with a single horn. I have with me a 3-pin relay(H-B-S) with me. I am connecting the positive from the battery to the B terminal, ...
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0answers
29 views
Kia rio 2012 engi. 1.4 power supply relay
Dears,
I have checked a car kia rio 2012 using active test for engine in diagnostic tool all test are succeed except the power supply relay i tried to locate it but I failed. Could you help me to ...
2
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3answers
73 views
car power line after engine start
I want to install a circuit in my car and I need a 12V power line after I start the engine.
I don't want this line to be powered when I turn the key on ACC/ON positions, only after the engine has been ...
2
votes
1answer
4k views
Run switch - 4 pin relay set up with 3 wires
Are there any issues with powering pins 85 and 30 from the same 12v wire? The starter on my friend's 1981 Yamaha XS45 was not working, so I upgraded to a modern solenoid. I followed all the wired with ...
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2answers
1k views
12V relay circuit not working
I have a pair of LED lights wired on my truck to a 12V 4-pin relay all correctly with a switch. The system worked great every time until I decided I wanted to add a small 5mm LED, so when I turned ...
2
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1answer
19k views
Why do we use a relay and switch to control on/off of horn circuit instead of using a simple swtich?
I know that a horn requires a larger amount of amperes to operate than many other electrical systems.
I am reading a book and I stepped into this situation:
..shows a relay application in a horn ...
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0answers
51 views
Why do i have running,turn,and flashers but no headlights?
My 1994 grand cherokee has running lights ,turn signals, and flashers,but no headlights,high or low beam. ive replaced the relays in the distribution block checked all fuses. What am i missing or ...
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0answers
185 views
Is it necessary to clean underhood relay and fuse box from dusts?
A little history:
My Chevrolet Aveo 2007 got into a strange state where it cranked, but did not start. It also had P0340 (Camshaft Position Sensor Code). Since, I did not see stable 12V on the Pink ...
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2answers
1k views
Wiring fog lamps with horn relay
I want to install fog lamp on my Maruti Suzuki alto 2009 model, but it did not came with any provisions for such modifications so I have to do it from scratch, the problem I am facing is that I cannot ...
4
votes
1answer
12k views
How to replace the door lock relay on Honda CRV 2005
I have a Honda CRV 2005 with the driver door power lock not working.
Here are the symptoms:
Power lock driver side doesn't work, but all other doors work fine,
I can lock and unlock the driver ...
3
votes
1answer
108 views
Very Strange Starting?/Electrical Issue
I have a very unusual issue with my 1993 Toyota 4runner SR5 4CYL 4WD 5 Speed.
I have had the car for a very long time, and recently I have had a very strange issue when starting the car and I can't ...
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3answers
7k views
Jumping solenoid to start scooter
My 125cc Chinese scooter doesn't start with the electric start button. However, when I short the two starter solenoid poles together, the scooter starts fine. I replaced the solenoid itself, but the ...
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0answers
83 views
ford focus 2003 new starter stays engaged new ignition switch,new wire harness to starter how to test starter relay
I have a 2003 Ford Focus. I recently installed a new starter motor, a new ignition switch, and a new wiring harness. The starter now stays engaged when I try and start the car. How do I check the ...
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1answer
1k views
What is the formula to determine a relay for aftermarket lights?
Looking at aftermarket Light Bars that do not come with any relays or switches so I can build a custom setup. Per research I didn't find this question asked before. The closest two questions I found ...
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1answer
40 views
Will this Relay circuit work?
I have a truck on which the rear turn signals are not very visible when the parking lamps are on. So I am trying to get the parking lamps to turn off while the turn signal is on. Below is the wiring ...
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1answer
2k views
Help tracking down a battery drain issue on a 2007 Vauxhall Corsa
I'm really hoping someone can help track down a battery drain issue with a 2007 Vauxhall Corsa.
We've been back and forth to a Vauxhall garage with this car since we bought it and have had a hell of ...
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2answers
5k views
Positions of relays in fuse box of Honda Accord 2003
I think that I swapped the position of these two relays.
Does anyone have any idea what the correct position for each of them is?
I can't figure it out using the diagram on the box.
2
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1answer
119 views
Automotive Relays - Are they water resistant? Proper placement?
I have installed LED lights in my toolbox in the bed of my truck what are you if the relay is waterproof and where should I install the relay?
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1answer
1k views
Where is the wiper relay located on a 1995 mercury grand marquis?
I need help repairing the wipers on my son's 1995 Mercury Grand Marquis. I have checked all fuses and replaced both the wiper motor and multi-function switch. Does anybody know where the wiper relay ...
