An automotive test light is a very handy tool to help diagnose electrical issues on many different things. A test light can help you to narrow down and pinpoint a problem on and electrical circuit on your automobile, camper, RV, boat and even a utility trailer.

This video will show you how to properly use a test light to diagnose where electrical problems may be on a circuit

Where to buy

Home Depot: http://www.homedepot.com/p/GearWrench...

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