Coil

Asked by Jan 20, 2018 at 01:27 PM about the 1999 Ford F-250

Question type: Maintenance & Repair

How to test my coil

1 Answer

123,635

If you have battery power on the positive side of the coil and a trigger signal on the negative while cranking it but no spark out of the tower then the coil is bad. Or take it off and find a shop that has a machine that can do a coil output test.

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