you are gonna need to do a continuity test on all the lane switches. there are prob two that will trip pin 8.
thats what the extra switch is for. one pin down, knocks the one behind it etc...
if you have a bunch of clip leads, you can find the hot or nuetral and connect them, then add one at a time to test/verify each switch.
the schematic would help, but those lane switch lines are a bear to follow.