How To Use A Test Light On A Car

Sunday, December 7, 2014

How To Use A Test Light On A Car

This is a video tutorial on how to use a test light to help diagnose automotive electrical problems. List of tools use.

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Most car owners use test lights to check basic circuits on their cars.

How to use a test light on a car.

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Before doing anything you should know which wires to test.
The test light will light when there is a sufficient difference of potential between the point of the light and the alligator clip on the other end of the ground wire.

Step 7 a test light can be used to test for power at the fuel injector reversing the clamp to the negative side of the battery will check the trigger side of the injector circuit.
Timeline below if you would like to jump to a specific section a test light is a simple quick tool to test for electrical issues in your car.
Test light are able to set off supplemental restraints airbags in a car when you probe a wrong wire.

A test light utilizes a bulb held in a probe attached to a sharply pointed rod with a connection lead.
One drawback to using a test light especially one that uses an led is that you cant really tell what voltage you have.
These wires may be marked with yellow tape.

How to use an automotive test light to find problems.
One such circuit is for their cars radio wirings.