Concerning the main electrical system of a motor vehicle or internal combustion engine. Consider a different tag for radios and other such systems.

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1997 Honda Civic won't start; stuck in park

Last Sunday I was driving home and noticed my dash had no lights and my power windows would not roll up. As I pulled into the driveway to park I tried to put the car in reverse. As I did so the ...
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1answer
846 views

Wiper motor voltage troubleshooting

I am troubleshooting a rear wiper motor problem in a 2003 Ford Focus wagon (LE). When I measure the voltage to the contacts (with the wiper switch on), i get intermittent (~4 s) voltage at 200 mV. ...
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1answer
818 views

Wiring up boat electronics - 240V and 12V with inverter

I've just bought a boat, but the electrical systems need a bit of an upgrade before going cruising for any length of time. At the moment, All the 12V runs from a single starter battery, and there are ...
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7answers
42k views

Unable to start the vehicle depending on how long it has previously been driven

I have a Citroen C3 which is giving me a headache. The problem is a recent one, and is basically that I can't start the car. The strange thing is that the problem only surfaces when I've been driving ...
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3answers
8k views

What is the Magic ON temperature for Electric Fans?

I want to wire up my old truck to turn an electric fan ON to keep the radiator cool. The ECM has an engine coolant temperature sensor mounted in the engine that alters the resistance to determine ...
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1answer
68 views

Number plate lights not working

Hi I have a one year old Motorhome, the number plate lights have corroded beyond repair. I am waiting for the to be repaired under warranty. Does this mean technically my Motorhome off the road as I ...
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1answer
207 views

Brake lights on '94 Honda Prelude stuck on

All 3 brake lights on my Prelude seem to be permanently stuck on. This occurs all of the time - the lights stay on even if there is no key in the ignition. I've had to disconnect the battery. Would ...
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1answer
9k views

Will a BCM prevent a car from starting?

I've been dealing with an issue for over a year wherein my 2005 Pontiac Grand Prix starts sometimes and does not start at other times. I had the issue diagnosed last year by the GM dealership. They ...
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1answer
84 views

2007 S40 - Accessory Delay (5 secs) when turning the Key to Position II

My son's 2007 S40 has an accessory delay of 5 (secs). The lights and indicators ultimately come on. The car has no problem starting and runs nice. The dealer says it needs a new ignition. An ...
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1answer
2k views

Replacing Vauxhall Corsa C (2002) rear fog light

I need to replace the right rear fog light in a 2002 Vauxhall Corsa C; not just the bulb but the whole unit. I'm looking for instructions on how to replace the lamp preferably without removing the ...
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2answers
298 views

What functions & features should I look for when buying a multimeter?

Going to be used for car maintenance/restoration work and around the house repairs.
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3answers
746 views

2003 Nissan 350 Z won't accelerate

We own a Nissan 350 Z and this morning it would not start. It would turn over but it wouldn't fire. After pulsing the gas a little bit it would start but then letting off the gas would cause it to ...
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1answer
471 views

2007 Nissan Maxima Windows and Sunroof are Unresponsive

All the windows will not go up or down including the sunroof. Everything else is working. The fuse under the hood looks ok. There no sign of it being bad. Can it still be the fuse and if not what else ...
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1answer
64 views

How do I test fuses with a circuit tester?

Lights all flicker. When I an in the cabin the head lights flicker. I want to test my fuses with a circuit tester. Should the engine be running or will I be blown away? Please help, I'm a newbie ...
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1answer
72 views

Electronic disaster after replacing water pump and alternator on a 2008 Scion?

I have a 2008 Scion. I changed the water pump and alternator. After I put it back together I have no power steering, power door locks or windows, Tail or brake lights. Half the warning lights on the ...
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1answer
49 views

Utility trailer lights issue

My small utility trailer has sit here for more than a year. Now I found its lights don't work anymore. I used my multimeter to test the four wire harness and find the following: Connect any other ...
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3answers
438 views

Pontiac Sunfire mysteriously won't start

So, here's the deal: -No lights, no noise, no clicking. -Battery voltage reads fine on multimeter. Terminals are very clean and not corroded. -But it won't jump start. -Headlights turn on. -Fuses are ...
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1answer
56 views

High idle, not shifting gears - 1995 Mercury Mystique

My friend has a 1995 Mercury Mystique that was suffering from low idle problems (stalling out at stoplights, etc). He replaced the throttle position sensor, and after that the low idle problem was ...
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1answer
64 views

Fluctuating amp meter on 1948 automobile

On an old auto 6 volt (generator/regulator) system, what causes the ammeter to fluctuate between zero and -35 amps? Seems acceptable at idle but fluctuates on the discharge side when driving. Will ...
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1answer
116 views

turn signal blinks wrong direction

I have a 2009 Jetta SportWagen TDI (Mk5). When I turn on my right turn signal, usually the left turn signal turns on instead. I'm pretty sure it is a problem in the lever arm. I can consciously ...
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2answers
163 views

05 Mustang electrical problems

I have a 05 Mustang base V6 auto. Headlights won't stay on. Sometimes high beam works. Everyday it's different. Last night when the fans turned on the lights would come on the off again when the fans ...
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1answer
115 views

Loss of power to the sound system. Can it be the ground?

I have a 2008 volkswagon rabbit. The sound system has stopped working completely. I've checked the fuses and none of them are blown. It is a stock 2008 vw rabbit 4 door which came with the ...
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1answer
387 views

2001 Mazda Protege — Battery Charge Problems

For the past year or so, I've had to manually charge the Protege's battery before going anywhere, every single day. Either the battery is not "holding its charge" or there's a component that's ...
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1answer
2k views

Jetta intermittent starting problem

I have a 2007 Jetta with 75k miles on it. What I'm running into is that out-of-the blue, the car will not start. Generally, it turns over, but never starts. One time, it started but shut itself off ...
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2answers
75 views

Keyless control system does not respond

I have a 2000 Ford Excursion. Suddenly the remote system does not respond. I checked the battery of the keyless and replaced it, but it didn’t make any difference. Are there any thoughts, or steps ...
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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. ...
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1answer
179 views

1999 GMC Sonoma 2.2L, 5spd, SLS - no reverse lights, suspect transmission

No reverse lights. Complete diagnostics reveal; good Fuses, good blubs, good continuity, good reverse light switch. The switch was checked two ways: 1. jumped out with a piece of wire between ...
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1answer
2k views

My 2009 Vauxhall Corsa D Won't Start

I measured the voltage of the battery without the key in the ignition and it's 12.6. When I insert my key and turn on the ignition the electrics work fine, the headlights come on etc. When I turn ...
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1answer
2k views

2008 Pontiac Grand Prix Fails to Start and Electronics Go Awry

My mother-in-law drove over this morning to pick up my wife, and when they tried to leave the car wouldn't start. Not only that; the horn honked, the wipers started, the trunk popped open, and the ...
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1answer
242 views

2000 Dodge Intrepid electrical problem

I accidently let the battery power cable touch the frame of the car and it sparked. Now my car does not light up dashboard or anything type of power. I tried jumping the car and still no sin of life. ...
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0answers
13 views

2000 Mercury Sable instrument cluster and headlights do not turn off

My 2000 Mercury Sable Premium LS (3.0L 24V Duratec V6) has an electrical issue: When I remove the key from the ignition, the instrument cluster and headlights do not run off. I can reach in at any ...
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0answers
12 views

F350 2002 wiring problems

F350 2002 wiring problems. Electric mirrors were fixed and then problems with power windows, air conditioner and radio arise. The windows, radio and air conditioner stop working after started and ...
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0answers
45 views

Which electrical parts in motorcycles are obligatory for basic driving capacity?

According to this survey, electrical parts in motorcycles are the most probable to fail. Which of the electrical parts in modern motorcycles are necessary for maintaining basic driving capacity? In ...
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39 views

Stubborn rear fog light (BMW E46)

The rear fog light in my BMW E46 2001 is broken. Obviously, I first tried replacing the bulb itself, but the old bulb was still fine. I tried with a new bulb anyway, but the light didn't work. I ...
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0answers
21 views

Problem switching in new dome lights in the front

I'm trying to install these multi-color dome lights, I successfully installed the right side, but when I tried to install on the left side, the left one won't work. The product is not the issue, I ...
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0answers
44 views

Battery Draw while car is off at 3.24

I have a 2007 Saab 95 wagon... For about 6 months at random about once a month my car has been dead. After calling AAA and they told me there is a draw from the battery at apx 3.24 which is should be ...
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25 views

parking light on 1990 Volvo 240 not working,

The driver's side parking light on my 1991 Volvo 240 is not working. Bulb is ok. Turn signal and head lights working fine. Mechanic says it is most likely a corroded wire inside an "assembly" or ...
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0answers
30 views

2009 Toyota Camry's brand new OEM power window master switch won't control the drivers window

Why would the driver's side window operate perfect with the original master switch but not work when I install a new power window master switch? I purchased 2 new aftermarket power window master ...
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0answers
132 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 ...
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221 views

06 scion Tc turns over then shuts off in two seconds

My fiancé drove the car with no problems this morning. After work she realized she left an interior light on which killed the battery. She got a jump from a car and charged the battery up a bit. The ...
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0answers
146 views

Electronic problem with Ford Fiesta diesel

While driving my Ford Fiesta Classic diesel engine car, I lose all the acceleration. The RPM meter gets stuck on 2 and all other readings were reset automatically in the speedometer? What could be the ...
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0answers
67 views

Changing Ford e4od to 4r100

e4od is a gear driven speed sensor/ 4r100 is reading directly off tail shaft and signal is much faster causing speed to read much faster. Is there a way to put an in-line adjustable type signal ...
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0answers
854 views

Mercedes C250- Eco mode not working

i have a C250, W204, 2011 model, and i noticed that the ECO mode is not working anymore. When i turn the car on, the ECO button light is green and the ECO sign appears in the cluster. After 1-2 min, ...
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0answers
428 views

Turn signal malfunction, is it multifunction switch or the flasher relay should be replaced?

I am having a similar problem on my 2007 Jeep Grand Cherokee Laredo, and the problem is: Stalk left: left/right all off Stalk neutral: left on Stalk right: left on. I will try the same trick and to ...
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1answer
228 views

'96 Buick Century Turn Signal Not Working

Yesterday I noticed that all four of my turn signals were not turning on. About two months I had the flasher replaced because they turned on but just would not blink, now they will not even light ...
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1answer
333 views

Electrical problems after auto start installation

I have a 2000 Camry, I've installed Bulldog RS90 remote starter about 5 months ago; and it worked just fine. A couple of days ago I started my car with a key, and could not shift the gear from ...
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65 views

How to fix “lazy” electricity to the cab of an '89 Mazda B2200

I don't know how else to describe it but as "lazy". There's power to the speedometer/temperature/fuel portion of the dashboard, but nothing else in the cab has power, including the interior light. ...
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68 views

No power to instrument fuse

I have a 94 Oldsmobile Bravada and the digital dash quit working. I found that I do not have power to the instrument fuse but have power to all other fuses in the panel. I can not find an electrical ...
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306 views

Where is the “comfort relay” in a BMW 1992 325i AUTO?

Please advise where the Comfort Relay is positioned in my car which is right-hand drive. The problem is that the windows and sunroof do not open or close.
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51 views

Access OnStar Wires on 2012 Equinox

I've got a 2012 Equinox that I want to attach an inviscord to the Onstar wires, but I am not sure how to access the wires. There is a wide black plastic cover where the rear view mirror attaches to ...