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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

Question
changed altenator, still no power going to battery
If the alternator is "new", and thus presumably good, the vehicle engine is running, the alternator drive belt is appropriately tightened, and yet you are not getting around 14.5 volts of charging current at the battery posts, that means there...
Question
Lights on dashboard on,new battery leaking battery acid, car radio smoking. What could this be?
The first thing I would suggest would be to check the charging voltage. Most alternators are capable of way more than the 14 to 15 volts that they are regulated to. If for some reason your charging system has gone...
Question
Charging System Not Working (Alternator is not kicking in)
The battery should be load tested by a professional. Load testing can only be reliably performed on a fully charged battery. If the battery passes a load test, you have to be sure it is NOT a marginal pass in...
Question
battery tested fine, car won't start
One way to diagnose this is to use a voltmeter to check for battery voltage at the starter motor when the key is held in the "start" position. If there is power to the starter motor, and yet it doesn't...
Question
altinater is fine but battery light keeps coming on what could be the problem? came on 7 times while on the road
The battery should be load tested by a professional. Load testing can only be reliably performed on a fully charged battery. If the battery passes a load test be sure it is NOT a marginal pass in which case you...
Question
Vehicle stalled without warning at stop sign. Won't start back up. 2007 Chevrolet Trailblazer
Hi - it is possible that all of this is due to an electrical problem - a bad ground (or burned out bulb) for example will make turn signals blink fast. It could also cause a "no start" problem. But...
Question
Brand new wiper motor keeps blowing the fuse.
If the wiper switch is in the "off" position and yet the fuse protecting the wiper circuit blows when you turn the ignition system on, there may be something wrong with the wiper switch itself in combination with a short...
Question
Power outage
Check the battery to frame ground. Also, if even the lights won't work, that usually signifies that a main fuse, or fusible link, has opened but of course the reason is why? Fuses only fail, thus protecting the circuit, if...
Question
my truck when I turn the key I have no power but when I jump it it starts up.
If you have a new, fully charged battery, and the starting system still does not function, there are actually only a relatively limited number of causes. Broadly, either the starter motor/solenoid assembly is faulty or the electrical circuit supplying the...
Question
Heater blower
If the blower motor does not respond to on and off commands at the switch, generally the switch is faulty. The turn signal issue is probably not related to the problem with the blower. If you hear the flashing unit...
Question
Won't start and has not electrical power.
Hi there. Check the battery and see if there is a voltage. If there is not voltage or a very little voltage, then I recommend replacing the battery. If there is a voltage and it is lower than 12.4 volts,...
Question
electrical ( headlights )
It is possible both bulbs are burned out. The low beam filament in each bulb should be tested with an ohmmeter. The bulbs can also be powered off the car to see if both filaments work but be wary of...
Question
Full system failure and no power to the vehicle
Hi there. Check all of the grounds to the vehicle from the engine to the frame and from the chassis (body) to the frame. A faulty or loose ground will cause multiple issues with the engine and electrical systems. If...
Question
Electrical Issue/It is not the recall.
Hi there. There is an issue with the ground to the light switch or the light switch is not working to make the lights flicker. The radio and the hazard lights are on different circuits, so they will not cause...
Question
2008 Toyota tundra 6 cylinder starts in the on position and shuts off while idling in park or reverse, but immediately starts itse
Hi there. It seems that the battery is failing and has a burned or overcharged cell. I recommend replacing your battery with a new one. When a battery gets old or overcharged, then the battery becomes weak. When starting the...
Question
Just replaced fuel.pump and now it wont start
If both the starter motor and fuel pump are not working be sure the Engine Immobilizer is not active. If you are sure the security system is off and yet power does not reach the fuel pump or the starter,...
Question
Bad starter or bad battery?
Be sure any engine immobilizer system (security system) is not activated, thus preventing the car from starting. The battery should be load tested by a professional. Load testing can only be reliably performed on a fully charged battery. If the...
Question
truck won't "turnover" even with new battery
Be sure any engine immobilizer system (security system) is not activated, thus preventing the car from starting. Broadly, either the starter motor/solenoid assembly is faulty or the electrical circuit supplying the motor has a fault. That circuit begins at the...
Question
My blower motor stopped working. I got a new one. Not the problem
If the blower motor is new, you'll want to first determine whether power is getting to it when the blower switch is in the on position. If there is no power, then the blower switch and the plug connection on...
Question
Last night my car died and I was able to jump it and get home, I had replaced the battery and alternator a few months ago 2003 Honda Accord
Hi there - it is unlikely your charging problem and the loss of coolant are related - with one exception - a failed serpentine belt and belt tensioner. Such a case could mean the belt is slipping on the alternator...

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