Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [relay]

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

117 questions
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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 as could be. The battery was already a couple…
RLH
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Meaning of relay acronyms: H-LP, E/G, DIM etc

I'm trying to get to know my fuse and relay boxes better. They're labelled, but the labels are mostly acronyms and shorthand, and googling any particular acronym gives a lot of mentions of common tasks on forums but not any definitions or…
user56reinstatemonica8
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Is it possible to repair an intermittent or flaky turn signal flasher relay?

Ouch, a new turn signal flasher relay is $65 at the local parts shop. Is it possible to DIY a repair of such a flasher relay?
Bryce
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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 relay for the lights so that it works with LED…
Andy Holmes
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Why a relay frequently clicks when a battery is low?

Shouldn't the starter relay be closed while a car is starting? Why does it open/close frequently when key is turned, making a repeated clicking sound? Does the relay behave this way only in the low battery case or it clicks always while a car is…
MiniMax
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Standard mounting screw for vehicle relay

I have a MAH-112-C-4 relay that is supposed to be capable of working as a relay for fog light, head light, battery control, oil pumb control, fan control, air conditioner, harness. There is a flange on it with a 5.2mm hole but the relay…
SeanJ
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Why do cars still use mechanical blinker relays?

I think the electronic relays may be cheaper; and having less moving parts they are theoretically less prone to break. So, why do cars still use mechanical relays for turning lights?
sergiol
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Golf MK4 Window Motor Click and Window wont open

First of all sorry for my english. I have a Golf mk4 1.4 16v 2 doors There are about two weeks that it started to make this click when i try to open the window and it just wont open. I tryed to contact some store that have used parts and i asked…
edisonmecaj
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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. It's winter here, so that's not a big deal. So now…
Earlz
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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 fuse box Lid Which covers these fuses & relays: The…
Jeyell
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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 the A/C tubes, and the pressure wasn't dropping…
tarheel
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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 up for about 4 minutes 30 seconds and in that time…
Paulius Matulionis
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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 were: After market lights Adding aftermarket…
Hᴇʀʙɪᴇ
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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.
Kristian Vitozev
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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 to learn. If this is the case some people say its…
yoonsi
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