Quoted from Coyote:So, you've run other tests, I'm assuming?
1. If you ground the driver side of the coil, the coil fires? You have 50v on the feed line? If no, this is your issiue.
2. If yes, you ground the driver line at the board, the coil fires?
Dealing with exactly the same problem galacticgames is facing on a DH I am "rebuilding/assembling." Coils 1 to 8 are all dead, the rest of the coils fire. I have voltage at the power driver board on J107 pin 2 of 72.9 volts. Fuse is good. Also tested voltage on Red-Brown voltage wire at a couple of the coils and got 72 volts. I have never "grounded" coils to fire them in a game. What's the best method? Use a jumper wire from the drive side purple wire side and touch it to the ground wire in the game? I am worried about frying transistors on the power driver board.(maybe they already are, but I can't image all of them are in the group from J130.) This feels like a wiring issue but it is hard to tell, should I be testing something else? I have run into some other hacks on this game in the wiring.
Thanks for any ideas and guidance.