Quoted from DnDPins:I checked the ohms on the coil and it seems good so probably a bad transistor. 2 questions:
When you measured the pop coil ohms, what did it read?
Were all 3 pop coils the same?
I had a dead pop bumper in a BDK, and when I checked the coil, I got 6-7ohms, but the two working coils read 10-11ohms.
When I de-soldered one of the wires and measured again, the bad coil was dead open.
RM