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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...
Symptoms of a Bad or Failing Electronic Spark Control
Common signs include engine performance issues, engine stalling, the car not starting, and the engine not sparking.
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...
Symptoms of a Bad or Failing Electronic Ignition Pickup
If your car has an electronic distributor ignition system and the engine stalls or car does not start, you may have to replace the ignition pickup.
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...
Symptoms of a Bad or Failing Electronic Control Relay
If your engine cranks but does not start or powers on but does not function, you may need to replace the electronic control relay.
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 get the car moving. In order for this process to take place, a number of different components...
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 was connecting a light to the dashboard fuse and when I went to turn on the car, it tuned on for a couple seconds then turn off
Honda advises against altering the vehicles electrical system and/or tapping into existing circuits unless the tap and device are specifically allowed per the Factory Service Manual, a Honda Technical Service Bulletin, or an official Honda accessory wiring diagram. The reason...
Question
i plugged my negative cable on my mercedes 2008 c300 before positive what could i have messed up
As long as you did not reverse the polarity of the battery (i.e., connect the negative terminal of the battery to the positive side of the vehicle electrical system and connect the positive terminal of the battery to the vehicle...
Question
I'm wanting info on replacing my entire dash with a more modern set up including stereo and air conditioning
The cardinal rule of modern auto electric systems is don't modify them at least if you want to be sure the entire system will function glitch free. These systems rely on tight voltage regulation, known loads, and freedom from EMI...
Question
engine cooling fan keeps running after car is turn ed off. New fan installed. problem still happens. aslo coolant and temperatu
A fault with a fuse would more likely result in non operation rather than continuous operation. ECM's rarely go bad, indeed of the ones "claimed" to be bad, that is of those sent in as warranty returns, based on surveys...
Question
I hear a click then my headlight go out then I turn the lights off hear a click about a few seconds later I turn the switch back o
The uncommanded, intermittent shutdown of the headlight circuit might be due to a relay opening or a defective headlight switch. It will be easy to find the problem at the instant it recurs by simply tracing the circuit to see...
Question
How do I know if the battery cable has corrosion it?
The seriousness of corrosion on a terminal or connection is usually just determined by visual inspection. You can perform a voltage drop test (and in your circumstance will have to) to determine the ultimate "condition" of a circuit, whether you...
Question
Engine shut off while driving
Electrical resistance increases with heat. Somewhere in an electrical circuit (ignition coil, fuel supply, etc.) the temperature reaches a point where the resistance creates a large enough voltage drop that the engine (controls) shut down. I would check the coil...
Question
My car will not turn over. I have a new starter and new battery replace yesterday but still wont start
If the starter and battery are new, and the battery is 100% charged, you probably have a large voltage drop (due to high resistance bad connections or a device fault) somewhere in the starting circuit. The starter circuit (wiring, switches,...
Question
I got a new alternator, radiator and battery after the installation my ground wires had a short from my battery. 0 power to right
No lights means the circuit is dead and that could be due to a fuse, fusible link, relay or other in circuit component that somehow got damaged by the short circuit. It sounds like several circuits are affected. The thing...
Question
2009 Bmw 650i left driver side fog lamp and low beam malfunction...already replaced bulb but light not on in the headlamp
If the headlight circuit uses a ballast, or other control circuitry, the output of the circuit should be tested. If power to the bulb is verified, and is within the Factory Service Manual specification, then the bulb is defective. If...
Question
voltage warning light still coming on 30-45 seconds after car starts.
Nothing should be replaced until you have in hand a definitive diagnostic pinpointing the faulty segment of the car's electrical system. There may be too much voltage drop in the charging circuit, as well as elsewhere, but start with the...
Question
A/C wires under pass. Dash are burnt and the wire wraps are hard
If the damaging wiring is in the A/C control circuit, the condition of the wiring that you are describing might be relevant to the problem you are having. Burnt wires mean high resistance in the circuit, so maybe there is...
Question
Courtesy light fuse drains battery 2000 Chevrolet Silverado
Hi there - great diagnostic work! At this point, having identified which circuit is causing the drain, you will need a wiring diagram that identifies what other devices are on this circuit (clock, underhood light maybe?), and could be drawing...
Question
2016 jeep compass fog lights dont come it shows on dash that they are but the lights are not
Hello, thank you for writing in. There are a few things you can do to track down the issue. Start with checking the fuse. It should be located in the main fuse box under the hood, and the diagram on...
Question
The + & - were switched for just a flash when the battery was jumped.
Your owners manual will identify the location of all of the fuse panels on the vehicle. Many vehicles just have two, one under the hood and the other somewhere inside the car whether it is behind the dashboard and sometimes...
Question
key turns and starts without the ignition on, making the power glass not to work and ac, not working,
You might have a power relay that is not working, or you may have a bad EIS (electronic ignition switch) The ignition switch has several different circuits so it doesn't overload when you turn it on. When one circuit fails,...
Question
Turn signals turn on hazards and car starts but no acceleration when step on gas?
Sounds like you may have a faulty module or a electrical fault like a bad ground somewhere on the vehicle. A loose connection or corrosion along a ground circuit may cause all kinds of electrical problems especially if the fault...
Question
My check engine light was on the code said po453.
The code is for a high input from the system pressure sensor so the problem may have not been the sensor itself, but maybe a short to power between the reference and signal sides of the circuit. This may also...
Question
Cross wire jump start 2007 Infiniti
Hello - it is possible that the reverse current from the "crossed-wire jump start" has damaged something in the Infiniti starting system. Check all of the fuses and relays related to the starting and charging system. These would have been...

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