About the main electric systems of the car. Consider a different tag for radios and other such systems.

learn more… | top users | synonyms

1
vote
1answer
4k views

Where is the Wiper Relay/Control Module located on a 1994-1998 Ford Mustang???

I am trying to repair my wipers, there is no voltage in the wires that connects to the wiper motor. I checked the fuses and current is passing through them, so they are ok. I think the Wiper Relay ...
9
votes
4answers
2k views

2000 Jetta runs rough, shutters on cold start only on wet days.

This is an issue I've had off and on for, embarrassingly, at least a year: On misty or wet mornings, everything starts out fine but, a few minutes into the drive (like clockwork. I even know the ...
8
votes
2answers
12k views

What is BCM(Body Control Module) in a car?

I own a Fiat Grande Punto. Recently I was told by the authorized auto workshop that the BCM in my car has failed and needs to be fixed. So i have two questions regarding that - What is a BCM and ...
0
votes
1answer
50 views

1994 Tracker Emergency Brake

I have a problem with the emergency light ((!)) staying on, just started 2 days ago when I went over a speed bump, Brake fluid is full, I topped it up a month ago, the gas task was close to empty so I ...
4
votes
1answer
3k views

How should the lights for a trailer be hooked up?

I have a tent trailer and the lights don't work right. It has a 4 wire connector to my car but one of the wires on the trailer connector was worn out and probably not working. So I got a new 4 prong ...
3
votes
2answers
331 views

Trailer wiring corrosion

Every couple of years I find that the trailer wiring connector (7 pin) on the back of my truck doesn't work properly, causing the brake or turn signals on the trailer to not function. This is caused ...
4
votes
2answers
3k views

Can cold weather cause TPMS sensors to malfunction?

I just bought a new 2011 Honda Fit and while driving it home from the dealer, I noticed that a little light on the dashboard was on that said "TPMS". When I got home, I consulted the owner's manual ...
8
votes
4answers
3k views

How to assess battery charge level and alternator performance?

What diagnostics can be done to to assess battery charge level? I'm interested both in one-off tests like can be done in car service and also continuous monitoring during normal use. Car panels ...
2
votes
1answer
119 views

What are the resistance values for a 1970s GM fuel level sender?

I'm looking for a chart that will tell me the resistance values for each fuel level. There are a few such charts like that for resistance readings on coolant temperature senders. Does anyone know of ...
0
votes
0answers
172 views

How do you locate a battery drain? [duplicate]

Possible Duplicate: Battery drains by itself when vehicle is parked (parasitic draw) Something is leaching current from my battery. Leaving it parked for a few days results in the battery ...
4
votes
2answers
2k views

Possible short in reverse lights on 2003 Nissan Frontier Pickup Truck

When I engage reverse on the manual transmission of my 2003 Nissan Frontier pickup truck, the reverse lights tend to sporadically turn on and off. I'm trying to figure out what path to take to ...
2
votes
2answers
338 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 ...
9
votes
3answers
18k views

Battery drains by itself when vehicle is parked (parasitic draw)

A 1998 Jeep Grand Cherokee has gone through 3 batteries in the last 3 months. While they have all been replaced by warranties, it'd be nice to get the problem solved permanently. I've tested the ...
4
votes
2answers
533 views

Upgrade to HID lights in a Jeep Wrangler

I would like to upgrade to HID lights in my 2008 Jeep Wrangler. The stock lights aren't bright at all. My question is, since this would be an aftermarket upgrade, what am I looking at here? Is it ...