Does anyone have a clear picture of connector J4 on the interconnect board? I’m troubleshooting a Dr. dude for a friend and someone prior had wires wrong. Mr. big was being triggered by the pop bumpers and other coils. That turned out to be his coil wire was connected to connector J 12 which is for the flashers. Every time a flasher went off Mr. big would jump around and sometimes lock on. I also corrected the heart and gift of gab flashers because they were
swapped in the wrong spot.

It has been hard to find accurate wiring diagrams for this game and it is odd that I have two brown blue wires.

The game also has the WPC P-6 Roms installed Which very well could be the cause of the issue. I burned the two correct ROMs for the system 11c. U26 and U27 But the game didn’t boot when I installed them. Might be because I used 512K chips instead of 256K. I didn’t want to erase and burn over the installed rum since the game boots up and plays just with that odd behavior. I don’t want to be stuck falling back with an unbeatable game so I may have to see if any friends have the correct size chips.

In the meantime I would like to be sure to get the wiring to that connector correct.

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Great thanks!

I was able to double the ROM size for the larger 512k chips and now have the game booting with the correct ROMS.

I have J4 corrected.

EDIT - searching image gallery first. It was J4 I could not find a clear photo of, but J12 had good pics in the thread gallery. Now I still have a brown/blue wire that appears should go to J12. If possible, could I get a pic of the J12 wiring?

I noticed the motor for the mixer spinner never comes on. All the flasher in that area light up when I make the ramp. So that will be next troubleshooting once I know the connector wiring is all correct.

Thanks again.

Fixed!

Man oh man, the guy who worked on this prior was either color blind or didn't take photos of the connectors before replacing them and went on memory.

4 wrongly placed wires on J12 and two on J4.