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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6
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2answers
86 views

No low beams but do have high beams

I have a 2008 Toyota tundra that I replaced 1 headlight on thinking it was bad but then replaced it a second time and it worked fine for 1 day and the all of a sudden now I do not have any low beams ...
11
votes
3answers
168 views

Multimeter - Basic Functionality and Howto

Multimeters I'm looking for some responses regarding multimeter basics for the site tag-wiki to point OP's at when we want them to use one. The question is; What are the basic functions of a ...
9
votes
3answers
254 views

How do you test analogue electrical circuits?

When trying to diagnose problems with conventional analogue electrical circuits, such as lights, speakers, heated rear windows, etc, as well as short-circuits and unexplained current draws, it can be ...
8
votes
1answer
120 views

Disconnected wires near battery in BMW e46

I noticed a disconnected wire dangling next to the battery in the trunk of my 2005 BMW 330ci. It was actually a red and blue wire that veered off from the thick red one in the middle of the image. ...
5
votes
1answer
63 views

Van makes knocking noise, even after it has been off for hours

I have an '05 Sienna. At 7 this morning, it was making a knocking noise when I went to leave for work. It had been off since about 9:30 last night. Clicked unlock on the remote and nothing happened. ...
4
votes
1answer
99 views

Battery light flashing after alternator install on 2004 Ford Escape

I just put new alternator on my 2004 Ford Escape, and now my battery light keeps flashing on and off, and it will sometimes stay on. The battery has been checked and is charging 100 % . The alternator ...
8
votes
3answers
709 views

2007 BMW Z4 won't start when my phone is plugged into the cigarette lighter plug

Sometimes when my cell phone is on charge in my 2007 BMW Z4 before I start it, nothing happens when I turn the key. The car is acting like it, as if I did not have the clutch pushed in - the key ...
8
votes
2answers
127 views

Old starter clicked, wont turn over engine. New starter wont even click - no noise at all

My old starter would click, but not turn the engine over. I got a brand new starter and installed it. The only two wires connected to the starter are completely different and can only be fit in the ...
9
votes
1answer
366 views

Locked out of my accord

My 2013 Honda Accord EXL the battery died the key fob won't open the door and neither will the manual key what can I do
5
votes
1answer
49 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 ...
10
votes
2answers
66 views

Peculiar Interior Lighting Issue

Recently a friend of mine was driving a VW Fox (not new, I'm not sure what year but it was certainly 5+ years old) home in the dark with the lights on. Strangely, after a minute or two of driving all ...
3
votes
1answer
295 views

What gauge wire should I use for adding USB ports to my car?

I want to add powered USB ports to my car to charge various devices with. My plan is to order these USB soldering connectors fuse holders, 3amp fuses, and some wire. Now I would find a hot wire ...
5
votes
1answer
88 views

What are slip rings with respect to a cars alternator?

This is not a physics forum, and as such I don't expect answers to explain Faraday's law of induced emf (electromotive force), which is the basic physics principle behind how an alternator is able to ...
4
votes
1answer
74 views

Response to 2001 Toyota Carolla vvt code 1349: what should I do?

I got a vvt 1349 code on my 2001 Toyota Carolla. I have noticed a sharp decrease in fuel economy. Some people have reported that the oil control valve may be causing the issue. The oil control valve ...
6
votes
1answer
68 views

Help with Strange Intermittent yet predictable parasitic battery drain?

I'm having an issue where while testing circuits for the offending drain, I will see NO drain for about 30 seconds and then a 6-9 amp drain for about 10; rinse and repeat. Anybody have an idea what ...
2
votes
3answers
20k views

Can I disable antitheft (PATS) on 03 Mustang?

Just bought an 03 Mustang from an auction and took it on a trip. The anti-theft system kicked in and I had to disconnect/reconnect the battery to get it working again. That worked a few times and I ...
2
votes
2answers
3k views

2004 Kia sedona intermittently wont start

my 2004 kia Sedona intermittently refuses to start. I have light, radio, electric windows but just doesn't turn over at all. If I leave it a few hours and go back to it, it'll start first time as if ...
6
votes
2answers
1k views

Suzuki GSXR600 (K7) - Burned regulator/rectifier

I have managed to completely fry regulator/rectifier on my Suzuki GSXR600 (K7). I suspect that it happened when I blindly splashed into a big water pond, so some water probably got on connector. Thing ...
3
votes
3answers
103 views

How can you use the headlights to tell the quality of your battery?

I understand that all headlights do dim briefly when you turn the engine on and that this is normal. I also believe that the headlights will dim more if the car battery is in poor condition. I hope ...
9
votes
1answer
295 views

A most intriguing cold-start misfire mystery

I'm trying to help a friend out with a CEL on his 2009 Merc GLK 280. Hooked it up to an OBD2 reader and retrieved a single code: P0300 - 'Random/Multiple Cylinder Misfire Detected', via the 'OBD ...
7
votes
3answers
133 views

2005 Toyota Corolla intermittant battery drain when not running

I have a 2005 Corolla CE with manual transmission. About one month ago the car would not start, and the battery was discharged to about 8.5V. Car had been not running for a couple of days but nothing ...
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
1answer
177 views

Diagnosing Vehicle Brake Lamp Fuse Blowing; What to test next?

Fuse keeps blowing when I press the brake pedal on a 98 Windstar. Brake switch is good. Inserted new fuse and the brake lamps do not light up before the fuse blows. Removed all bulbs front and back ...
3
votes
3answers
67 views

03 Chevy Suburban Fuel Pump Failure

A few days ago, my dad's Suburban was running while sitting on a steep driveway with a low level of fuel in the tank, and the fuel pump suddenly cut out. Knowing that fuel pumps can wear out from heat ...
6
votes
5answers
261 views

Charging circuit

I have a motorhome and tow my car behind. Since I have to leave the car in accessory mode so the steering wheel is unlocked, the battery doesn't last a long time. I want to run a DS line from the ...
10
votes
1answer
4k views

Why do the lights flicker when I accelerate?

I have a 2003 Ford Focus. Recently, I've noticed that when I accelerate (step on the gas), all the lights on the car flicker. This happens to both the dash lights in the car and the headlights ...
3
votes
1answer
40 views

Golf mk4 climate control show speed instead of outside temperature

I know you can change climate control to show current speed when you enter diagnose mode but it gets reset after ignition restart and also you cant adjust your temperature or something like that while ...
4
votes
1answer
70 views

Honda Civic starting problems?

my honda doesn't want to start, in the morning it starts with one crank but as soon as I drive and I switch off the car and I want to start again then it doesn't want to start. When I take a piece of ...
4
votes
5answers
2k views

Right hand side blinkers on Holden/Opel Barina not working

The right hand side blinkers in my 2005 Holden/Opel Barina stopped working. When I turn the blinkers on they do the right click-click sound just much faster than usual. All 3 blinkers stopped working. ...
8
votes
1answer
60 views

Suzuki 2004 sv650s wiring

I got a 2004 sv650s Suzuki when I turn the key on the fuel pump does not come on and the CHECK light comes on on the dash. All the lights come on and the starter button does not work.All the fuses are ...
4
votes
0answers
36 views

Why would headlights stop working after turning over

I have a 2006 Pontiac G6. When I walk up to the vehicle and unlock it, the headlights turn on. After I get into the vehicle and turn it over, I cannot turn the headlights back on. Fog beams and turn ...
4
votes
2answers
663 views

Low beams don't work but high beams do. What do I do?

It's a Chevy HHR 2006 and I don't know what to do. First one low beam went out now both are not working but both high beams are working. What do I do?
4
votes
2answers
34 views

Does 2000 Mercury Sable LS Premium have 12V available?

I'm going to be driving/living in a '00 Mercury Sable Sedan LS Premium 4D, which has a 24V electrical system. 100% of my equipment runs on 12V. Does this car have a high-current (>40A) 12V regulator ...
2
votes
3answers
5k views

Radio Wiring diagrams and/or color codes?

I've got an older Nissan truck (1994) that did NOT come with a factory radio. A previous owner had an aftermarket style radio installed, and the installers used one of these universal radio ...
10
votes
1answer
71 views

Engine starter just won't stop starting

I have a 98 Toyota privia and upon starting it the starter just keeps going. This only occurs in drive and neutral. The vehicle also starts in any gear. When I start in park the starter keeps spinning ...
8
votes
3answers
232 views

Good car for full electric conversion

I am just going into my final year of mechatronics engineering, and as a project for my spare time I am looking to convert a car to fully electric drive. At the moment I am also toying with the idea ...
7
votes
2answers
684 views

2004 VW Passat B5 Cigarette Lighter Broken - Common Problem

The problem I have been having with my VW Passat was that my cigarette lighter was not working in the car. It is the only one in the main part of the car (there is another one in the boot) and it ...
10
votes
1answer
178 views

How do I make all of this work together?

I have a friend with 1988 Jeep YJ. I'm not sure if this question is more appropriate for here or for Electrical Engineering. We want to mount this blender with an AC motor in it. I think it's 110 ...
4
votes
3answers
106 views

judging oxygen sensor quality

I was looking at oxygen sensors for my vehicle on rock auto and found large price discrepancies. I saw sensors ranging from $25 up to $100. in general what do the more expensive sensors have that the ...
8
votes
1answer
61 views

2000 Suzuki Grand Vitara 4x4 flashing

Whenever i engage my 4x4, the 4x4 light flashes. It didn't used to do this. Its annoying watching it flash. Any ideas what could be causing it to flash?
2
votes
1answer
15 views

1998 Chevy Blazer - Headlights not getting power on one side

Can someone help me out? I had HID's in my blazer for about 3 months and the passenger side always went out so I took them out and put the regular headlight bulb back in. After I did that, I now ...
4
votes
2answers
246 views

LED lights on same switch [closed]

I'm trying to wire 4 low voltage LED lights in a vehicle. I would like all 4 lights to come on with one switch, and only 2 of the 4 lights with another switch. I could also use one switch if it has ...
6
votes
1answer
113 views

Battery light on after new alternator

Car: 2003 Honda Civic Si G1Wh dash cam, 400w amp, 4300k HIDs My alternator failed badly (stereo cutting off), no battery light. Replaced it with a reman Duralast, battery light is on. It shows 14.5v ...
3
votes
2answers
169 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 ...
5
votes
1answer
57 views

How to Track Down an Electrical Short

In a previous question regarding my dashboard lights not working I found that the "tail" fuse would burn out immediately upon turning on the headlights. This is after someone did repairs to the horn, ...
3
votes
0answers
1k views

Mercedes Atego OBD2 live data codes

I have tried to connect an OBDII ELM327 adapter in Mercedes Atego. Somehow I managed to get it in that OBD2 connector. I can see that my adapter is receiving electricity. These are the PID's that I ...
10
votes
1answer
216 views

Are there downsides to making an accessory socket always live, if accessories are removed when not in use?

In some cars, the power line from the battery to the accessory outlet (aka cigarette lighter socket) is always live. In others, it's off until ignition. It seems pretty much random which cars are ...
7
votes
0answers
43 views

Fiat Siena EL 2001 was starting but jerking very bad whist running [closed]

Fiat Siena EL 2001 model It has a starting problem, I'm really desperate to get it running again, please help. The car was starting and running but was jerking very bad when in 2nd gear. The ...
6
votes
1answer
74 views

Can I Mount auxiliary lights for Hero Honda Passion 2002 bike?

I am having a Hero Honda Passion 2002 model bike. The head light is very low and it works on engine power not on the battery, due to this riding bike in no light area with lots of ups and downs are ...
6
votes
2answers
75 views

Oil pressure light on when igntion is off and goes out when key is on and engine is not running

83 Mitsu PU Diesel. Oil light on drawing .25 amps when key is off. Key on the light goes out. All other lights and gauges work as they should. Light is off when the engine is running. It is ...