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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
EPC light on an now I have no power, brake an battery light is flashing
You probably have a dead battery. The computer systems on your car will be prone to odd behaviors when the battery voltage gets low, so you may see lots of things that don't make sense. The battery could be dead...
Question
All pass front window, electric mirror, heated seat indicator & driver low beam not working.
These all sound like separate issues. They probably presented one at a time. If you hear a sound in the door when you push the button for the window, that would indicate a mechanical malfunction in the window mechanism. Electric...
Question
My, Mazda 6 inside lights and tag light don't work and all the relays and fuses are good
I would recommend you do a careful check of all the lights on the car to be sure that these aren't the only ones that are out. It's possible that these things are all on a single circuit and you...
Question
HI I have a 99 Audi A6 The radio lights are not working also the AC lights
You could be right about a fuse, or it could go deeper. There are two circuits for the console lights, one makes them go dimmer when you turn on the headlights. That's why things change when the headlights are on....
Question
Jumper cables crossed.The car wouldn't start. Found it was a fuse that blew which we replaced. The car turned on but then we had t
If you are very lucky, you may just need a battery. When you cross the jumper cables, you can do a lot of damage in the blink of an eye. If it just trashes the alternator and the battery, you...
Question
Alternator is overheating...had it tested and was told everything looked good. What would cause this problem?
Hello, thank you for writing in. The charging system is rather simple including the alternator, battery, and the cables. If you have tested the alternator off of the vehicle, there may be another component in the system that is causing...
Question
My 1989 Ford Mustang 5.0 is grinding after being started . I also have to mess with the key to get my radio & wiper blades to work
The electrical element in your ignition switch is probably failing. In many cases, that part of the switch can be replaced without replacing the lock, so you don't have to mess with new keys. If you continue to hear grinding...
Question
Ford transit 2001 Hi, I had a short on my battery and my Transit ford does not turn on any lights. What can it be?
Hello, thank you for writing in. The short with the battery may have damaged fuses in the main fuse box. To check this, you will want to either visually inspect all of the fuses, or use a multimeter to electronically...
Question
Parasitic drain 2005 tahoe on ignition a fuse
Hello, thank you for writing in. Great job on the electrical testing thus far! A wiring diagram for the vehicle will work wonders for you if you can obtain one. If you are referring to the ignition switch fuse, then...
Question
Left front blinker won't blink when the lights are on or parking lights
Be sure the bulb filament is intact, although if the turn signal works, as you say, when the headlights or parking lights are off, the filament is probably OK. For some reason, the turn signal circuit is being interrupted by...
Question
Car wont start
Hello, thank you for writing in. The vehicle may be having a programming issue. The security system may be locking you out as a result. You need a high-tech scan tool to properly pull enough information from the vehicle to...
Question
Windshield Wipers and Lights not working.
Hello, thank you for writing in. The wiper's motor circuit may have a short somewhere that is blowing the fuse. Weather can not only cause corrosion but can stress out the wiper motors and cause them damage as well. Both...
Question
Lights, trunk keyless entry and fuel door not working
There is a good chance that these are all on the same circuit and you have a blown fuse. Check your car's owner's manual for the fuse panel location and you can check. Most fuse panels have a description of...
Question
A fuse keeps blowing on my 2005 Dodge Dakota and I don't know if it's my wiring or the fuse box itself
Hi there. If there is a fuse that is blowing then that means that you have a short circuit. That can be anyplace in the electrical system which also includes the fuse box. I would need to know which fuse...
Question
Hello I need help, I have a 2003 XC90 that is stuck in either 3rd or 4th gear. Everything else works fine (park, N, R) it's auto.
That's a curious mess of problems. I would first suspect a problem in the ignition switch itself. The switch has several separate circuits and one of them may be dropping out causing the seeming random failures. Since your transmission is...
Question
I've Mercedes ml350 and I was driving g under heavy rain the next day my signal lights, wiper blades, power seat stop working
Hello, thank you for writing in. The passenger (right) side of the vehicle (on yours and a lot of other vehicles) holds a computer system behind the fender (just under the floorboard). This is the box that controls the power...
Question
My hazard lights come on when open my car door and my clock in my car blinks also and my hazard light stay blinking what is the pr
Hello, thank you for writing in. There are several reasons why the hazards might turn on when you open the door. Typically when you open the door the jamb switch which controls the connection to your radio and interior lights...
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
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
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...

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