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

learn more… | top users | synonyms

5
votes
1answer
33 views

Burning air pressure switch

I use a 12 V air compressor at my car for air suspension which I understand is draining around 30-35 A. The problem what I have is overheating and eventually burning the pressure switch and ...
8
votes
1answer
356 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 ...
5
votes
1answer
39 views

BMW E60 (525d M Sport 2005 UK). Cranking but not starting. Fuel Pump/Relay issue?

Background: Long term bad earth problem has been causing iDrive to crash and reboot for years. Bad earth seems to drain the life of the battery over a period of a few years. On my 3rd battery now. ...
2
votes
1answer
74 views

How to connect a 11-pin flasher relay so that turn signal dash indicator lamps work?

I have here a combined flasher and hazard flasher relay for a truck, called "Bosch Warnblinkgeber 24V (3+1) x 21W", part no. 0 335 215 250. It has 11 pins to connect: 31 49, 49a C, C2 L, R, RL, LL, ...
2
votes
0answers
33 views

Defective connection between radiator fan relay and ignition?

I have a Toyota AE101 DX Corolla. When I turn the key to start the car it does not tumble. It turned out that the fan relay doesn't come on with the key turned on like it usually does. Mind you this ...
0
votes
1answer
813 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?
2
votes
1answer
220 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 ...
3
votes
0answers
113 views

Hooking up daytime running lights on my vehicle using relays

I am looking to run my 2006 Honda Ridgeline's daytime running lights on 50% power, or close to it, on the accessory wire. When I turn my park lights, head lights, or brights on, I would like them to ...
2
votes
1answer
239 views

Electronic Flasher replacement for LUCAS FL5 to work with both -VE and +VE cars

This is about replacing a LUCAS FL5 3-prong flasher unit with a plug-and-play replacement circuit that will work with a much lower current than the FL5. The FL5 uses a bi-metallic strip and a heater ...
2
votes
1answer
418 views

Chevy Malibu 2009 won't start

I have a 2009 Malibu, yesterday I was heading back from school, then I started hearing a bizare sound like a whining sound, 2 minutes afterwards the engine stopped. When I got off to check under the ...
3
votes
1answer
2k 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 ...
1
vote
1answer
169 views

Wiring Relay & Horn on Golf Cart

I've had this wired up in the past but I forget how it was done and some things came apart. We have a simple 12v horn and relay. The relay is a KUMP 7D58-12. Here (http://imgur.com/a/dtBFo) are some ...
4
votes
1answer
6k views

Do I need to replace the A/C Clutch, A/C Relay, or A/C Belt?

My '05 Mazda Tribute (just over 200,000 miles) is having problems with the A/C. A while back it was the freon according to the previous owner. I connected a pressure gauge to the low pressure end of ...
5
votes
2answers
922 views

BMW 530xd E60 2008 diesel possibly fuel pump problem

Car details: BMW 530xd E60 2008-05 Diesel 170kw. The pump is working as it should be, it has been tested in BMW center. Problem is, when I turn the ignition on, the check engine light doesn't come ...
3
votes
2answers
3k views

2001 Monte Carlo ss. 3.8 liter cooling fans

2001 Monte Carlo ss with a 3.8 liter motor in great condition. The problem is... check engine light on, Temperature gauge not working and cooling fans stay on for 5 minutes after turning car off. ...
3
votes
3answers
19k views

Is it possible for a car to start and run with a dead/dying fuel pump? If so then for how long?

After reading a related question, I suppose my problem could be the relay, so I'll have to check that as well. However, the problem is still the same: My car won't start, and I don't hear the fuel ...
1
vote
1answer
6k 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
3answers
9k views

Which relay to use for bike headlight

I have Bajaj Pulsar 180 UG4, it has a 35 watt HS1 Helonix headlamp bulb. I want to upgrade the stock headlight to make it brighter, so I found H4 Xenon bulb 60/65 watt. I asked this question question ...
7
votes
6answers
50k views

How many amps should my car pull while it is turned off?

I've recently started having a bit of trouble with my car. I typically drive my car to and from work each day. A couple weeks ago I went on vacation and when I returned, my car battery was as dead ...
1
vote
1answer
307 views

Does anyone know of a commonly available DPDT or DPST relay? (For use as replacement starter relay)

I have a car (1971 Jaguar E-Type 6 cylinder) with a bad starter relay. The original relay is not available, and all of the specialty parts suppliers sell a generic replacement relay. I'd like to ...
4
votes
4answers
2k views

How do you test relays?

I have a Pontiac Grand Am. After getting a hose replaced, I noticed that my fans don't come on now. I checked the fuses and cooling fan #2's fuse is burnt out, which (I think) should be for AC only. ...
2
votes
1answer
706 views

2003 Pontiac Bonneville - How to Remove Relays in Fusebox

My grandparents have a 2003 Bonneville which has, in the past few months, started to become very wishy-washy with its air conditioning fans. They'll work one day, then not the next. They'll hit a bump ...
2
votes
2answers
2k views

What's the correct fusing for a headlight relay?

Summary of the situation: I have a 1975 Ford truck that suffered from the "Ford flashing headlight problem". The factory wiring uses 18ga wires over a very long path and through an under-rated ...