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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45 views

Calculate car battery life using OBD parameters

I want to calculate the battery life of a car based upon OBD2 parameters like engine load, distance traveled, Control Module voltage etc. Can anyone please guide me as to how to do this? If ...
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1answer
38 views

What would go into a tranny swap on a modern vehicle

I have a 1999 Isuzu trooper and I have been toying with the idea of doing an engine and transmission swap on it. If all goes well with the engine I plan on getting I would like to replace the ...
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1answer
12 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 ...
3
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1answer
29 views

1997 Honda Accord F22B2 - Electrical Issue After Cylinder Head Repair

I recently replaced the head gasket and timing belt on my F22B2 (non-VTEC, 4 cylinder) 97 Honda Accord. I got everything put back together, but now the ignition switch doesn't have the same results ...
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2answers
383 views

How do cigarette lighter splitters work?

I have a 3 way cigarette lighter splitter that says: Input: 12VDC, 8A Output 3 Ports: 12VDC up to 8A Fuse: 8A, 250V Does this mean it outputs 8A per port or, does it mean if the load of all ...
3
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1answer
90 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 ...
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1answer
42 views

Constant drain on battery solution

I have a 2012 Ford Fusion SE. My problem is that my dc power outlets (cigarette lighter) are on continuously. I was charging one of my cell phone battery packs and as I unplugged it I noticed that ...
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57 views

Ford Focus - Central Locking Failure

I would really appreciate some help. So my central locking has stopped working. I can put the key into the door and lock and unlock the car but I can't use the fob on the key. Attempt 1 I tried was ...
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1answer
50 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
25 views

Tractor wont start

Not sure if this is the right stack exchange forum to post this in or not, hoping it is... I have a Toro lawn tractor which is having issues starting. I have been using it fine for the last few weeks ...
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0answers
20 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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3answers
57 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 ...
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3answers
58 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 ...
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0answers
48 views

Low beam not working in headlight

I have a 1999 Miata, i bought the car for 750$ as a project car. it had some body damage but i figured i would fix it. The car is mostly done now, but i have one major issue. The low beams in my ...
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0answers
30 views

loss of gauges on a 2003 Ford Escape

My son has a 2003 Ford Escape V6, that will all of a sudden have a loss of all gauges while he is driving and then they will come right back up with no loss of power. There has been times he has ...
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1answer
47 views

How to wire trailer brake to 2014 Ford Focus ST

I am in the process of wiring in a universal trailer light controller into my 2014 Focus ST. In doing so, I've run into a very strange issue which is just beyond my electrical knowledge and I'm ...
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1answer
27 views

Have a 2000 Jeep XJ Cherokee Sport with Electrical issues

I have replaced computer, starter, alternator and battery twice in the last 2 years. The other day when I turned the key the lights cut off and no attempt to start. I removed battery connections and ...
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1answer
67 views

1996 Ford Explorer Speedometer and Shifting issues, O/D light flashing

My 1996 Ford Explorer began having issues at the end of a moderately long drive home while going approximately 60 miles per hour (not sure if related; I drive that speed often). The speedometer ...
3
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1answer
61 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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0answers
56 views

Wire front camera+sensors+display on SINGLE Ignition switched 12V wire

I want to install front parking sensors & camera (+display). So I have: Kit of 4 sensors + controller Camera Display Basically I know how to install & wire them, the thing I don't sure is: ...
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2answers
1k views

When reconnecting a battery, why connect the positive first? [duplicate]

When reconnecting a battery, why is it recommended to connect the positive lead first, and the negative lead last? What difference does it make if they are connected in the opposite order?
3
votes
1answer
62 views

Brake light connector drops to 0v when bulb is in, 12v without bulb

I'm stuck with a basic electric problem, on my honda cb500. The rear light bulb is a twin-filament for position/brake, 12v 5/21w. It's brand new and tested. The battery has 11.9v. On the rear light ...
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0answers
28 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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1answer
31 views

Odd Dashboard Cluster and Control Behavior

Car: 2005 Dodge Grand Caravan Problematic behavior About this time last year is when this all started. It first surfaced in that when I went to startup the car it started but after about a second ...
2
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1answer
43 views

positive ground / neg. ground

With a/c current in a home rather than a vehicle, I don't think one would ever get a positive ground. Electricity always flow from the positive to the negative from what I have been learning about a/c ...
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1answer
58 views

Starter or Electrical?

My 2007 Mustang GT makes funny noise when starting, and lately disconnects my Clock and radio. Would that mean that I need a new starter or do I have electrical problems?
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1answer
46 views

electric windows broken

Can anyone help just got home and have gone to do my electric windows up and non of them will go up I had an issue with the passenger side switch not doing the window up but would do it down but now ...
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0answers
40 views

Highest Fan Speed on AC/Heater Blower no longer works.

I've found a couple of posts here about blower fans that only operate on high speed, but the issue I'm having is the opposite. All of the fan speeds work except for the highest speed (really the only ...
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2answers
255 views

Interpreting ABS/DSC fault code

I have an ABS, DSC and handbrake warning light (the latter telling me it's likely from one of the rear wheels) on my BMW E46 320d from 2001. The warning used to be intermittent (it would go away, then ...
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2answers
106 views

Is it ok to start the car with my GPS, cell phone, etc. plugged into the 12V port?

I remembered reading somewhere that we shouldn't start our cars with devices (GPS, cell phone, video game device, etc.) plugged into the cigarette lighter port. This is because when we start our car, ...
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2answers
668 views

How to simulate that automatic-engine stop feature?

I have a brand new Honda Vezel (Japanese market only). It has this fanciful but useless and nuisance feature that shuts down the engine when I come to a stop and automatically restarts the engine ...
3
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1answer
32 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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2answers
101 views

All warning lights came on, the odometer did not.

I have a 2008 F150 160k miles and all of the warning lights came on (Check engine, ABS, low tire, parking brake, 4x4 Hi and 4x4 Low from what I remember). The odometer was just a blank green screen. ...
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3answers
196 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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2answers
52 views

2003 Jeep Liberty 3.7 v6 misfire

I have a misfire on all 3 cylinders 1, 3 & 5, all on the same side of motor. It seems more likely to be an electrical problem than coil packs since all are on same side. Is this a problem anyone ...
2
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2answers
62 views

Viable replacements for lead-acid batteries?

Given the state of battery technology, is it viable for either motorcycles or cars to replace the original spec 12V lead-acid battery with a different type of battery? My question comes about as I ...
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2answers
85 views

Subaru Forester XT 2002 driver power window malfunctioning

My driver side power window does not go down automatically but will go down if you keep the switch depressed. On the other hand the up function only work by continuously pulling and releasing the ...
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0answers
55 views

Wrongly plugged battery terminals

I inter-switched my battery wires, positive to negative. Now the car moves but does not accelerate with the pedal to the floor. What have I done to the car? The car is a Toyota land cruiser v8 2006. ...
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0answers
208 views

Car Stereo and separate clock keep resetting when car is turned off

Car Stereo and separate clock keep resetting when car is turned off. I bought recently a 2005 Kia Spectra. Car had several previous owners. Stereo is aftermarket pioneer. The stock clock in the car ...
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0answers
34 views

Merdeces stalls after 30sec-1min, and battery warning light is on [duplicate]

I've got an old but low mileage Mercedes and This problem puzzles me. The car stalls after a short time(30 seconds to 1 minute) after start up and the battery warning light on the dash lights up. I ...
3
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1answer
43 views

CanBus - monitoring

My Volvo (2002) uses CANBus to monitor various lamps (I assume its current that's monitored). I intend to splice into one of the headlamps and one of the sidelamps and use those live feeds to dim ...
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0answers
16 views

Automatic A/C recirculation problem [closed]

I have a Toyota 2014 4-Runner limited and I have a problem where the recirculation button will automatically turn off. It works fine when it's on, but is there a way to turn off the auto turn off?
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1answer
64 views

Dodge Caravan headlights; 1 on with running lights, other on with headlights

I have a 2002 Dodge Caravan. When the running lights are on, one of the headlights is on. When I turn the headlights on, they switch; the one that was on with the running lights turns off, and the ...
3
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1answer
36 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 ...
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2answers
525 views

Will an auxiliary battery hurt a vehicle's alternator?

I am going to be road tripping and living out of my SUV for a while. I need a way to power a tiny portable cooler/fridge 24/7 and would like to be able to power my cell phone, laptop, and maybe a few ...
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1answer
122 views

Car radio stopped working

Hi I'm 16 years old and have just bought my first car. It's a 2001 Mazda protoge. Today while I was driving I plugged in a USB charger for my phone and the radio shut off. Now the radio won't turn on ...
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4answers
1k views

How does a lightbulb with two filaments know which one to light up?

I need to replace the taillight/brake light on my car, and it's a bulb with two filaments (known as 12V P21/5W - see pic) My car has two taillights on each side. A standard 5W bulb for the top half, ...
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0answers
157 views

Battery Light Won't Go Off Since Changing Battery

I just changed the battery on my 98 Mazda 626 and now the battery light comes on and stays on after starting the car. I checked the battery and it's reading 12.8v with the engine off, and 13.8 with ...
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1answer
26 views

Low idle and tacho twitching after electrical cut out

The car is a 93 VW Cabriolet (Mk1 Golf/Rabbit). I was parked with the engine on lowering the hydro/electric roof when the engine and power cut out. I couldn't restart the car so checked the battery ...
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1answer
32 views

1999 Yamaha 80hp Outboard Electrical Problem (Rectifier Overheating)

I recently purchased a pontoon boat and on day #3 my motor died, I'm hoping to get some help from the community with correctly diagnosing and fixing the problem. The motor - 1999 Yamaha 80hp four ...