Hi there,
I've been working on a Gulfstream for a while now but I haven't been able to get some things working yet.
They may be related so I'll tell you everything that is going on with it.
The two main issue that I can't figure out are the reset bank under the playfield doesn't reset and the flippers are reversed. It should reset the "special letters and the tic-tac-toe numbers but doesn't ever reset. The flipper wiring appears correct by looking at wire colors from buttons to coils.
The other issues, in case they are related, are no 5x scores registered, either 500 or 5000. The kickout holes don't kick out despite good switch contact. Finally, the numbers don't advance on the tic-tac-toe grid.
I feel like I've looked at most possible causes but I wanted to throw it out the to see if any of you wanted to take a crack at it. I have the manual and schematic in hand if you have any suggestions.

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Thanks for taking the time to help out mikala, Dave and Dr.
The fuse is good but I'll trace backwards until I get power.
I'll also dig in to the 100 point relay. Also double check everything on the match unit. Didn't think about that before. Thanks.

Anyone have any thoughts on the backwards flippers? I've never seen anything like it.

Sorry, yeah. The left button activates the right flipper and vice versa. The wiring is correct (looking) but they are reversed. I'll be honest, I don't know how that's even possible.

That is something I hadn't thought of. I'll look at that. Thanks.

It was Jones plug related for sure. Not at all sure what was happening but I cleaned all of the Jones plug connectors and when I plugged them back in almost everything works again.
I haven't ever done it before but I'm thinking maybe I had one of the Jones plugs plugged in one position too low.
Regardless, all of your suggestions gave me a second wind and more confidence to find the issue. Thanks for taking the time. I always appreciate it.