How to test a coil under load

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Testing a coil doesn’t have to be difficult.   A resistance test is often recommended but that can be unreliable since it’s not testing the coil while it’s actually working.  The best test is when the coil is under load, or actually working. If you suspect a possible bad coil, here is a quick and easy way to test the coil without expensive labscopes and equipment.

The  
Pedal Pumper

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