The most common problem with electrical problems with cars is a blown fuse. Testing your fuses should be your first step with diagnosing electrical problems.
Things You'll Need
- Test light
- Your Car
First locate your fuse panel. Most new cars have one in the engine compartment generally referred to as the PDC or the power distribution center. The other is generally inside the car under the steer column near the floor or on the driver's side of the dash.
Hook up your test light clamp to a good ground. If your in the engine compartment just use the negative battery terminal. If your inside the car use a door hinge or something metal attached to the body of the car.
Turn your key to the on position. Each fuse will have two little metal pieces at the top. With the needle side of your test light touch each metal top piece of each fuse. Each fuse should light up twice. If one side lights up and the other doesn't you have a blown fuse.
How to Test a Fuse
Some older homes still exist where the electric is protected by fuses rather than more modern circuit breakers. With this type of...
How to Use a Circuit Tester on a Car
A circuit tester is a simple mechanism in the form of a pen with a light bulb and a ground lead with...
How to Check for Bad Fuses
Over the course of car ownership you may encounter a blown fuse. A fuse protects the electrical circuits in your vehicle from...
How to Check Fuses in the Home
When power goes out to only one part of the home, the fault may be a blown fuse. Fuse elements are made...
How to Replace a Car Fuse Relay Box
An automotive fuse box, sometimes called the circuit panel box or fuse block, has the unique function of protecting every electrical circuit...
How to Test Auto Electric Circuits
Your car has several miles of wires connecting all the electrical equipment to the power source, such as the battery and alternator....
How to Test a Car Fuse Box for a Current
An automobile typically has two fuse boxes. One, located in the engine compartment, is for the motor's electrical needs, and one in...
How to Fix a Faulty Car Fuse
Fuses protect your car from electrical short circuits and power overloads that can damage equipment or start a fire. Often, a fuse...
How to Diagnose a Blown Fuse in Your Car
Find out how to diagnose a blown fuse in your car with expert automotive tips in this free online car maintenance and...