Apparently two resistors are switched on one of the gear tooth sensors in the KOP.
R3 and R4 are the ones....see the pics...
http://www.chiefdelphi.com/forums/sh...6&postcount=21
So now we know what we have to do.
The bad board in our case is the one that was cut off the end, that is, the one with J1 and J2, the board with J4 and J5 is good.
But you should double check!