With the key on, do we have 12V at the W/B wire and a good ground at the B wire of the power transistor? If so Take a test light with the clip on the positive battery terminal, use the probe end to tap on the white wire at the power tranistor. Do we produce a spark at the coil secondary each time we tap and remove the probe?
Conner

Over the hill but still climbing.
88 Montero 2.6L auto, manual hubs, cooling fan conversion gps,recurved distributor,LSD Diff.