How to test an ignition coil/module with a test light (distributor ignition) – GM



The tests shown in this video can be used on most ignition coils with the exception of the 3 and 4 wire coil over plug systems.
When you have no spark from an ignition coil, you must first test for “control” (the switching on and off of the coil). There are multiple ways to do this. I show two methods in this video. One is using a basic test light and two is using a scope and low amp probe. Finally, I show how to perform a resistance test on the coil itself, using an ohmmeter.
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Post time: 07-17-2017