Electrical Circuit Tester
This circuit tester is a simple but extrememly useful tool. If you are trying to diagnose and troubleshoot an electrical problem, sometimes a circuit tester can help you rule out possible causes much more quickly and easily than a DMM (Digital Multi Meter). It's quick, easy and very versatile, so the test light style of circuit tester can be a lifesaver. You can use it to check any positive circuit. Headlights not coming on? if the fuse is good, you can use a circuit tester to trace the wiring path and find out what's gone wrong. If the positive path is intact, you can also use the test light to check the grounding points of the circuit.