Measured all magnets except the trunk and they measure 4.5ohms. Swapped the drain ones and still problem. Disconnected spirit ring still problem. The good news is the fuse blows once high voltage is present (coin door closed). I noticed by just being in solenoid test with it on stop and closing the coin door, there is a major hum and the fuse lights up. Like I said the good thing is the problem is worse and constant.

UPDATE did a pcb swap and all good I think. Thanks Dean.

My question now is I have a tiger saw motor croc clip that connected to a resistor on 12vp on the rottendog pcb. Where do I connect it on my original williams driver pcb? I have tp1 and 3 label 12vu and 12vr which I'm guessing mean regulated and unregulated. Please advise if you can or if you need more info. See photo

Also where and what bridge rectifier is stuffed on this rottendog pcb. I can't seem to find where the br's are on this board. See photo. Thanks