The upper GI went out during a game. I assumed that something shook lose, shorted and blew a fuse.

All fuses test good. Don't see anything shorted under the PF. Just the upper half including the pop lamps and even coin door lights. Any idea on what to be looking at next?

I think I have narrowed it down, the top yellow yellow-white pair here has no voltage.

20160206_114213_(resized).jpg
The bottom purple purple-white and middle yellow yellow white get 6.5v ac as expected.

Now for the important part why?

I tested the fuse in, then removed and tested it out. Just in case.

From the connector above, only the purple pair and the middle yellow pair come back to this plug and the fuse block, where do the top yellow pair go?

20160206_123456_(resized).jpg

Sorry I was not very clear.

All of the pairs from the 9 pin GI plug on the power supply give 6.5 AC.
I am not getting any voltage at the yellow pair on the playfield.

20160206_114213_(resized).jpg

This plug seems to go to the playfield so was testing at this plug first. The purple pair (pins 1,2)go back to the p/s and the middle yellow pair(3,4) go back to the p/s both give 6.5 AC as expected.
The top pair of yellow (5,6)do not give any voltage, but I can't seem to trace them back to the p/s so I was wondering where they come from?

Found the problem, the 9 pin connector going to the p/s is the problem. If I wiggle it I get my GI back, it is a little brown on one side so I am going to replace thanks for the help.