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electrical system

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Symptoms of a Bad or Failing Fuse
If your car's accessories are shutting off on their own or you find a black fuse, you should inspect the car's fuses and replace broken ones.
How to Clean Battery Connections
Cleaning your battery connections, especially if the terminals are corroded, will help ensure the battery lasts longer and performs well.
How to Inspect Car Fuses
A fuse is a low-resistance resistor device that protects a circuit from becoming overloaded. It is a short piece of wire that is designed to melt...
Symptoms of a Bad or Failing Fuel Pump Relay
If the engine is stalling or not starting, or the fuel pump is not making any noise when the key is on, you may need to replace the fuel pump relay.
How to Replace an Automatic Shutdown Relay
The ASD (Automatic Shutdown) relay is failing when electrical functions in the vehicle are inoperative or when the car will not start.
Symptoms of a Bad or Failing Starter Relay
Common signs include the vehicle not starting, starter staying on after the engine started, intermittent issues starting, and a clicking sound.
Symptoms of a Bad or Failing Tail Light Lens
A cracked tail light lens will progressively get worse until the tail lights won't work, so make sure to routinely check them before they fail.
How Long Does a Fuse Last?
The electrical system that is on a car plays a large role in ensuring that everything is running efficiently. There are a number of different things in a car that will require a...
How Long Does an Electronic Spark Control Last?
The job of the electronic spark control is to control the engine timing. This part can also be called the "knock sensor", as it monitors any unusual knocking, or vibration that...
How Long Does an Electronic Ignition Pickup Last?
Your vehicle depends on electricity in order to run, and this electricity can be traced back to the spark plugs which create a spark to ignite the fuel. It’s a whole...
How Long Does an Electronic Control Relay Last?
So much of your vehicle relies on electronic components nowadays. They all work in conjunction with one another, so that means when one fails a domino effect takes place, and they...
How Long Does an Ignition Coil Last?
The combustion process that happens when your car is cranked is vital in order to...
How Long Should a Car Battery Last?
Eventually your car battery will become worn out and need to be replaced. Most car batteries should last about six years if well taken care of.
How to Dispose of Car Batteries
Car batteries have chemicals which can damage the environment. Dispose of car batteries at a battery recycling center or a local auto supply store.
How Long Does a Horn Switch Last?
With all of the danger on the roadways, finding a way to keep yourself and your car safe should be a concern. A car has a variety of different mechanisms that are...
How to Change a Car Battery
Changing your car battery is a simple and easy automotive repair that you can...
How to Replace an AC Control Module
AC control modules fail when the air does not distribute fully. If the temperature is inconsistent, the control unit may be at fault.
How to Replace an Electronic Control Relay
Electronic control relays are tied to many components in your car. When an electronic part doesn't work in your car you may need to replace a relay.
How Bad Driving Prematurely Wears Out Your Car
Bad drivers and bad driving habits can cause strain on car parts, especially the tires, brakes, body, and electrical and steering systems.
How to Replace an Instrument Voltage Regulator
The instrument cluster has a voltage regulator that fails when the panel is dim or flickering, reads erratically, or is totally inoperable.

Related questions

Question
I have a 1995 Lincoln Towncar which won't turn all the way off.
The ignition switch is a darned good place to start. A 1995 car should be pretty straightforward electrically. There may be one or two power relays that could be suspect. The only way to tell for sure is a point...
Question
I have no power at all. No dome light, no radio, nothing. I have replaced the alternator battery and starter and checked all fuses
I suspect your problem is in the power distribution box or in the connections going to it. Chrysler has a fancy name for it, they call it a TIPM for Totally Integrated Power Module. These modules have a lot of...
Question
One headlight working - changed the bulb and it didnt work
Hello, thank you for writing in. Several issues will cause faults with the bulbs. If the dim fog light and broken headlight are on the same side, this is a good indicator that there is an electrical wiring issue. Essentially,...
Question
Driving radio went off came back on, radio stayed on after removing key turned the power off now car won’t start
This problem sounds like you have electrical connection issues with the body control or engine control modules. You should first have computer system scanned for codes and then have connections disconnected from control modules and checked for connection issues and...
Question
My check engine light came in, 2 days later all the lights came on and car died. Changed battery and wouldn't even attempt to star
If you are lucky, there may just be some damage to the alternator and/or some fusible links may have been blown. I know it's not much help now, but I strongly advise people NOT to jump start their cars of...
Question
Turn signals activate brake lights
You probably have the wrong bulbs in the sockets. Your car likely uses an 1157 bulb, a bulb that has been in use since the '60's, but bulbs have been changed and part numbers superceded over the decades so it's...
Question
Van stalls after raining
This problem may take some additional diagnosis by spraying the engine harness and sensors with water like the crankshaft sensor connector may be letting in water and will stall the motor.
Question
Volvo s40key was stuck won't crank clicking from fuse box
It may be that you have low system voltage. That might be because of a dead battery, or it might be because of an interruption in the power distribution. But since everything is computer controlled these days, if the system...
Question
Hello, I have a 2004 Hyundai Elantra and the horn fuse blows soon after replacing
There are probably a few other devices that run off that same circuit. check your owner's manual and see what else there may be. If the fuse blows without you blowing the horn, then it is probably not the horn...
Question
My 1997 Cadillac diville will crank but dies after a few seconds even if i give it gas yet sometimes will crank and run fine
Hello, thank you for writing in. Electrical issues with the anti-theft system can mess with the functionality of the vehicle. This does not mean that this is the cause of your problems, but is worth inspecting further. If it feels...
Question
Everytime I hit a bump while driving all my dash comes on, ven my gas gage down all the way down. No I cant use my turn signals.
This kind of problem sounds like a loose or bad electrical connection to the dash cluster and radio. I would recommend starting and running the engine and go to wire harnesses you can get to under dash and engine compartment...
Question
Accidentally touched the two battery terminal cables together.
Thirty years ago, you could have done that and gotten away with it. with a 2012 truck, there is likely some damage. The multiple computer systems on your truck are very sensitive to voltage surges like the one you just...
Question
I changed my foglights to led's and when I tried to start the car it did not start all kind of photo showing up and my I drive scr
Hello, thank you for writing in. The first thing to check is the installation. Make sure the power supply was hooked up correctly, as LEDs are polarized and must be wired perfectly. Secondly, you want to make sure the wires...
Question
My BMW won't start after sitting in a puddle
The water must of been high enough to short out electrical system. You will need to get car out of water and let it dry out with battery disconnected. Have battery recharged and then after a day of drying out...
Question
Some time when im driving my truck i hit the smallest bump all my dash lights come on. As if my car cut off but it doesnt.
The instrument cluster electrical connections can become loose or have small amounts of corrosion in the connections to the cluster and other modules. This condition may require disconnecting the cluster and other modules and cleaning connections and adding some approved...
Question
My Cadillac Escalade just got returned to me from the shop, because it wouldn’t start. They said they replaced the computer, but n
This sounds like you have electrical connection issues with the dash or body control module. These vehicles are known to have electrical connection corrosion buildup that caused these erratic electrical problems including no starts and running issues. This problem will...
Question
Convertible top won't go up
Hello, thank you for writing in. Due to the fact the convertible top's motors make no noise when they are triggered, they are likely not receiving any power. The most likely reason for this is a short that is only...
Question
Car stalling when slowing down, speedometer broken, no indoor lights, car keys inoperable.
You may have shorted out a fuse that goes to the radio wiring to the body computer. Try to disconnect all radio wires except to speakers and see if systems start working again. You may have wired into the computer...
Question
Fuses
These kinds of electrical system failures are most likely from different electrical connections throughout the system getting small amounts of corrosion in the connectors and will require each affected system connector to be disconnected and a small amount of dielectric...
Question
Is it possible that an aftermarket seat warmer could case a BCM to short out?
There is not enough information to go on to know if the aftermarket seat warmer caused a computer short. If you plugged into the power port and if system was overloaded then it should have just blown a fuse and...

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