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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.
Symptoms of a Bad or Failing Distributor O Ring
If your car has a distributor, common signs the o-ring must be replaced include oil leaks and engine performance issues.
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...
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 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.
Symptoms of a Bad or Failing Alternator
Common signs include having to jump start the car frequently, dim lights when operating the vehicle, or the Battery Light coming on.
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...
Symptoms of a Bad or Failing Daytime Running Lamp Module
If your daytime running lights do not come on, stay on when the car is off, or produce a burning smell, you may have to replace their module.
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

Hi I have a Polo 2013 Comfortline and I've been struggling to get it running
Hello. If the vehicle was struck by lightning, then chances are that the gateway is bad. Most of the time, this sort of damage will require the replacement of every module in the vehicle. None will be protected from this...
My gas gauge keeps fluctuating from empty to full and everything in between.
The symptoms you are having may be related to a mechanical issue, or an electrical issue. If the problem is electrical, you will want to check the wiring terminal that connects to the fuel pump. You may need to drop...
Instrument panel lights on and rear wiper not working. What do I do?
Volkswagen (later models at least) use a power distribution unit (PDU) that aggregates the usual fuse box items onto larger current supply wires, which then have much larger fuses (i.e. 25, 50 100 amps). It is possible that swapping the...
Speedometer not working
Hello. In order to more specifically answer your question, I would require your vehicle's make and model. Generally speaking, speedometers are usually controlled by a speed sensor, and in older models with an accompanying speedometer cable. If the speed sensor...
The car battery doesn't seem to be charging I replace the alternator and the battery the car runs for about 10 minutes and everyth
This may be related to a failing voltage regulator or potentially a bad ground connection. As you may know, the voltage regulator regulates the amount of charging the alternator provides to the battery. When this is not working correctly, this...
Power steering makes a soft "click" sound while driving and then goes out.
Depending on the model of Saturn that you have, the vehicle may have electric power steering. If the vehicle has electric power steering, it is possible that an electrical fault may exist. This fault could be located in the relay,...
Speedometer, revolutions meter, and miles counter not working.
Hello and thank you for contacting YourMechanic. It seems that there could be a ground wire that is loose under the dashboard. If the ground wires are all good and tight, then the instrument cluster panel needs to be repaired...
My car has no electrical power and there is a blown 80 amp fuse under the hood
It sounds like you have a ground issue. Check the ground wires from the battery to the fuse box. Make sure that the cables are tight and free of corrosion. Check the condition of the battery terminals for corrosion and...
Electrical fault
Getting your car broken into is a pain! Often the thieves do thousands of dollars of damage to your car to steal a hundred dollars worth of stuff. It can take a long time to sort everything out. It sound...
2003 Dodge Dakota still won't start after replacing battery
The starting system is rather simple. The battery, the starter, and the ignition are the only major components. There are a few sensors related to the system that may need to be checked. The first thing you should do is...
My 2014 Honda Vezel shows a smart key system warning even though the key is within range
Hi, this problem appeared on 2013 Honda cars (Technical Support Bulletin 13-101), and may have been extended to 2014 models since the problem persists. If a problem code of B12D1 is also associated with this fault, the sub relay box...
Ignition fuse keeps blowing
You had a good start by tracing the wires and making sure they were clean, dry, and not damaged. To make sure you covered the entire circuit, I recommend you use an official wiring diagram to check this. It is...
Something is draining my battery, both battery and alternator have been checked and are working fine.
Hi. Your diagnosis is spot on! If the alternator and battery are good, something is causing a pretty significant drain on the battery, and this needs to be identified. This problem can be diagnosed by connecting an ammeter to the...
Instrument cluster shuts off intermittently while driving
There are two fuse boxes on the vehicle. One is inside of the firewall usually located in or around the dashboard. Have you checked this fuse box and the fuse box in the engine compartment? The dash cluster itself may...
Car caught on fire.
Hi there. From the description you have provided, I'm unsure as to exactly what your question is. Numerous things can cause an under hood fire. Fluids (engine oil, power steering fluid, brake fluid, transmission fluid, gasoline) leaking onto the exhaust....
Gas tank's fuel pump stops pumping fuel randomly. Both fuel pumps are new, gas tank is clean, and a new fuel filters were installed.
Hello. The first thing to check when you have complete failure of the unit is the power supply. If the wiring going to the pump is loose or has a short somewhere, the power wont be delivered or will be...
Upon locking the door and exiting the car. The alarm started screaming and I cant turn it off. What can I do?
Hi there. It sounds like the "panic" function of the key fob is stuck. Remove the key battery and inspect the function of the panic button. If it is not operating correctly, then replace the key fob case if available...
Total electric failure - 2003 Plymouth Aztec
The issue could be the battery. If it was connected wrong it may have worn it down and caused it to fail prematurely. If it was used, then there is even more reason to suspect that is the issue. Have...
I have a 2000 Ford Taurus. A couple weeks ago I was driving and I lost all electrical power to it. Now it will run but very badly.
Hi there. From the description you have given, your vehicle loss of electrical power could be a faulty ignition switch. It could also be, a poor ground pigtail at the negative battery terminal. The combination of inoperative electrical components leads...
2004 Honda Civic LX. The entire electrical system pulsates with the engine. New battery and had the alternator tested.
Hi there. From the description you have provided, your vehicle's pulsating electrical system is an unusual problem. The main relay is not likely to cause your vehicle's electrical issue. The fact you have been driving your vehicle this way for...

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