Heater Fan Testing and Replacement
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A test lamp can be used to perform many different tasks. Ground the alligator clip and probe with the point to anything you expect to have current. If it doesn't light up, something is broken in the circuit. Even if you don't have a multi-meter, a test light can do important functions such as setting static engine timing and, when used with a power source, act as a continuity tester--all for about $7. View Related Article
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