Questions tagged [relay]

Electrical device which, when energised by a small electrical current, safely switches a larger electrical current.

Filter by
Sorted by
Tagged with
0
votes
0answers
8 views

Circuitry help - 2 stage relay or controller advice

got a puzzle to get round. We are looking at wiring up a motorcycle which uses canbus for the indicator tell tell on the speedo so we cannot completely rewire in a new system. The problem specifics ...
0
votes
1answer
42 views

Car won't turn over on good battery and starter

The car is a 2007 Mazda6 3L which I parked overnight and won't turn over in the morning anymore. I did some preliminary diagnostic and ruled out some possibilities: The battery is full, 12.4 V. The ...
0
votes
1answer
43 views

Is there a temporary fix for Jeep Grand Cherokee Dodge Durango power pump relay recall v62?

FCA in November 2019 issued a second recall for 2011-2014 vehicles, but has still not devised a fix and all dealers will turn away customers seeking a fix because there is no direction from FCA and no ...
0
votes
1answer
141 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?
5
votes
2answers
6k views

Motorcycle won't start without jumping the solenoid

If my bike wont start but does start when I use the wrench on the solenoid trick; does that mean I need to replace the solenoid? I'm having trouble working this out as I'm new to mechanics and trying ...
2
votes
1answer
2k 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 ...
0
votes
3answers
10k 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, ...
0
votes
1answer
25 views

What Would Cause Only One Headlight to Work at any Given Time?

Say a vehicle has two working headlight bulbs. We confirm that the battery gets power to both bulbs and have seen both operating individually. What would be some reasons that only one bulb works at ...
2
votes
2answers
22k 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 ...
2
votes
1answer
177 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 ...
0
votes
1answer
58 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 ...
3
votes
1answer
160 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) ...
1
vote
3answers
8k 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 ...
4
votes
1answer
7k views

Current from key to solenoid of starter motor relay

I am considering installing a starter motor immobilizing relay inline with the starter setting of the key and starter solenoid. I recently got a MAH-112-C-4 online. It has a 30A switching ...
2
votes
1answer
49 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 ...
4
votes
1answer
13k 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 ...
0
votes
1answer
36 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
0
votes
0answers
8 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.
1
vote
1answer
186 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 ...
0
votes
0answers
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 ...
0
votes
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 ...
1
vote
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 ...
2
votes
2answers
72 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 ...
3
votes
1answer
1k views

Brake lights no longer work on a Volvo V70

My car is an old (2001) Volvo V70. Last year I experienced intermittent failures of the brake lights, and it led my mechanic to exchange the break pedal switch. This seemed to work fine for some ...
0
votes
1answer
63 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
9
votes
2answers
4k views

Mini Cooper 2003 - Changed lights to LED, insanely fast indicator lights now

Changed all the lights on my Girlfriend's Mini Cooper last weekend, since then the indicators have been going crazy (assuming due to power consumption being very low). I know you can replace the ...
0
votes
2answers
70 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 ...
1
vote
1answer
193 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??
3
votes
0answers
491 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 ...
0
votes
1answer
43 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 ...
1
vote
1answer
237 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 ...
2
votes
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 ...
1
vote
0answers
74 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 ...
0
votes
0answers
39 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 ...
1
vote
4answers
19k views

Replacing Starter Relay on Honda Accord 2003

In having this issue, I am trying to figure out how to find and replace my starter relay in a Honda Accord 2003. Where is the starter relay? How can it be replaced?
0
votes
1answer
12 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 ...
0
votes
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 ...
0
votes
0answers
11 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
2
votes
1answer
15k views

motorcycle headlight with single SPDT relay

I have bike with 35 watt HS1 bulb and I want to upgrade brightness of headlight so I decided to put H4 60/65 watt xenon bulb. An expert on this forum suggested me to use relays as the new bulb ...
1
vote
0answers
596 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 ...
2
votes
1answer
490 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 ...
1
vote
2answers
941 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'...
1
vote
0answers
204 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 ...
6
votes
1answer
22k views

Honda Accord 2005 Headlight relay location

Side marker and full(high) beam working fine, but not dipped (low beam) headlights. Checked all fuses - ok. I looked at the cover of the fuse box above (pic below). Honda Accord 2005 under-bonnet ...
2
votes
3answers
80 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
0answers
64 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 ...
1
vote
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 ...
4
votes
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 ...
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 ...
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 ...