How do I do a Module/Coil test on my Dyna III?
A. Disconnect the sensor wires and touch the female (module end of the input wires to ground. Do not touch the 12 volt (red) sensor wire to ground. You should get a spark at the appropriate spark plugs every time the inputs are grounded. If not, it indicates a bad electronic module, a bad coil, or a problem somewhere in the wiring not associated with the sensor plate.
