I am trying to fix my cousin's Williams Hurricane pinball machine. The Service Credits, Volume Up, Volume Down, and Begin Test Switches are unresponsive. Also the coin switches are unresponsive. The coin insert slots are not lighting up.

I've used a voltmeter to measure across the switches. I get about 12 volts across each switch.

Everything appears to be properly connected. I found a wire pulled out of the connector on the coin door open switch. I also found a pulled out wire on the Start button light. I added new connectors to these and both have been fixed.

Would anyone have any advice on how or what to troubleshoot?

I have checked the continuity for all of the harnesses. I have continuity between the J116 & J119 connectors and the J2 connector. Same with the J212 & J205 connectors and the J1 connector.

I have continuity between the J6 connector and the wires it connects with (Col. 1, Col. 2, Col. 3, Front door switch, Start button, Plumb bob switch, and the Start button lamp.

I have continuity between the J3 connector and all of the coin door switches (the four push button 'admin' switches, the three coin slot switches, and the slam tilt door switch). I also have continuity for the coin slot lamps.

When powered up I get about 11.5 VDC across all of the switches. I do not appear to get any voltage for the coin slot lamps.

The push button 'admin' swtiches and coin switches are unresponsive.

Thank you Jimy for helping me.

I tested all four 'admin' switches on the coin door. Their voltages to ground were about 11.5 VDC in the open position. Upon closing, they all initially went to 0 VDC but then settled around 6 mVDC.