Posts Tagged: How to use a test light

How to test automotive electrical issues with a test light

Use a test light to diagnose electrical issues There are two types of automotive test lights; powered and unpowered. The unpowered test light versions are the most common and least costly. I’ll show you how to use an unpowered light to check fuses, connectors and ground connections. How to use your light to check for a good  ground connection Before using a test light, you should test it using your car battery. That confirms the bulb is working and you’ve got a good ground connection. Next, connect the alligator clip … Read More