Table of Contents
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IH: Coil: Engine Control - Sub-01B
- A quantity of ignition coils (31609-80) used on all 1980 models, failed at low mileage. The problem was an internal breakdown of the windings within the coil. This is a failure that could lead to poor vehicle performance and a possible fouled spark plug. 1)
- Upon inspection of an ignition related failure, follow the diagnostic procedure outlined in the service manual. Inspect the primary and secondary coil resistance with an ohmmeter.
- Resistances should be:
- Primary: 3.3-3.7 Ohms
- Secondary: 16500-19500 Ohms
1)
HD Service Bulletin #M-793 dated July 3, 1980
