Diagnostics-Checking your Coil - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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post #1 of 1 (permalink) Old 09-30-2008, 02:01 PM Thread Starter
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Diagnostics-Checking your Coil

How to check Dual Fire coils (Pre TwinCam):

The ignition coil will need to be unplugged from the wiring harness at the point where the smaller wires connect to the coil. Once those are un-plugged from the coil, use a ohm-meter to test the primary and secondary windings.

To test the primary windings, connect the ohm-meter to the points on the coil where the wiring harness connected to the coil. The primary resistance should be about 3 ohms.

To test the secondary windings in the coil, put one lead from the ohm-meter to each end of the spark plug wire connections. The secondary winding resistance should be about 13,000 ohms.

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Last edited by Kainam; 06-28-2009 at 04:09 PM.
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