Having problems with a short circuit in your car? Using this method will help you find which circuit has the problem. First, disconnect the positive cable to your battery. Second, using a 12 volt test light, connect the clip to the battery cable. Third, using a pair of vice grips or a small C clamp, connect the probe end of the test light to the positive side of the battery. The light should turn on if you have a radio with a memory. Find you fuse box and remove the fuse from the fuse holder marked radio. After removing the fuse the light is still lit, that indicates there is power being drawn from another circuit. Remove the fuses one at a time until the light turns off. Once it does, diagnose all accessories on that circuit until the problem is found.
Things You'll Need
- 12 volt circuit light
- fuse puller
First, disconnect the positive cable to your battery.
Second, using a 12 volt test light, connect the clip to the battery cable.
Third, using a pair of vice grips or a small C clamp, connect the probe end of the test light to the positive side of the battery.
How to Find a Short With a Multimeter
One function of a multimeter is to check for continuity. Continuity is the transfer of an electrical charge from one end of...
How to Troubleshoot an Electrical Dead Short
The dreaded dead short. No, I'm not talking about a bad horror movie or an outdated fashion statement, I am talking about...
How to Fix Electrical Shorts in a Car
Electrical problems in cars can be a nightmare of tracing wiring trying to find the problem. An electrical short in your car...
How to Tell If a Car Has a Short Draining Battery
Waking up to a dead car battery is frustrating, especially if it happens more than once. If your car starts when jumped...
How to Find an Electrical Short in an RV
Short circuits range from direct shorts that blow the fuse immediately, to high-resistance types that take several minutes to blow the fuse,...
How Can I Trace a Short Circuit in My Car?
Tracing short circuits in your car can be a downright nuisance for even the most skilled mechanic. If the wiring of your...
How to Trace Open Electrical Circuits on a Car
An open electrical circuit means that there is a break in the continuity of the circuit. Circuits that are complete are considered...
How to Trace Electrical Auto Wires
Within your vehicle there are several miles of electrical wiring. Some are thick cables that connect to powerful items like the starter...
Troubleshooting an Auto Electrical Short
If a car has an electrical short, it is either due to a battery that has gone dead overnight, or a blown...