MI
Quoted from Kaveman:Thank you so much for the advice.
I shorted the corresponding transistor tab to ground and nothing happened. Did the same with the working kicker coil and it triggered the working coil. This suggests the transistor may be faulty.
But when I tested continuity of the faulty transistor tab to ground, there was no short there. Could the transistor still be bad with these findings?
Thanks again!
Your problem is almost for sure (not 100%, but probably close!), *not* the board. If you short the transistor tab, and nothing happens, the problem is either the connector to the board, or the wiring to the coil. The board is not the issue, at least not at this point. The transistor tab is a direct link to the coil. There's no electronics between that transistor tab and the coil (it goes right to the non-banded coil lug.) If you ground the transistor tab and nothing happens, you have a wiring or coil power problem. This needs to be addressed FIRST before you start messing with the board.
To test the coil/coil power, you should probably start by grounding the coil's non-banded diode coil lug. If the coil fires, you have power (and a good coil.) Next ground the transistor tab on the driver board for that coil. No coil activity? you have a wiring/connector problem.
