Question about 1993 Harley Davidson FLSTF Fat boy

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1942 - 45 -wla motorcycle ingiton coil failer, whats the test procedure?

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Ok, right out of the book.

Equipment: fully charged battery, complete working distributor, spark plug, jumper wires, and coil with plug wires to be tested. With the jumper wires, connect the battery positive (+) terminal to the coil forward terminal, connect the coil's rear terminal to the breaker's terminal and connect the battery negative (-) terminal to the breaker base (turn the breaker shaft to open the points to prevent burning the points). Attach a spark plug to one of the plug wires and hold the other plug wire against the plug's metal base. Spin the distributor shaft by hand. If all is well, the the plug will fire stongly. If it doesn not fire, each plug wire will need to be tested separately. Run an additional jumper from the coil body to the plug's metal base. Connect the plug to one wire, spin the timer shaft, watch for fire. Switch to the other plug wire and test. Which ever wire does not fire, remove it and clean it at the bottom or replace it, Clear the wire's coil hole of obstructions (possibly tar is filling the bottom), reseat it and retest it.

Good luck
Steve

Posted on Aug 04, 2010

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