Working on a Wms Gulfstream that has PF and Back glass lights, and nothing else. Manually triggering the reset relay resets the scores but then stops and no response anywhere. What is odd is that there are two unusual electrical readings on my meter.
A:One side of the start button switch reads 18.1 volts, the other side zero - until pushing in the switch. Then both sides read zero. Can't understand how the powered side of the switch would go to zero also when switched pressed. Jumped the lugs on the back of the switch stack, same result.
B: The flipper buttons, including all leaves on the left switch read appx. 24 to 28 volts before buttons pressed. Both sides of most PF coils, including flipper, pop bumper, kickout holes, and some relays, read appx 24 to 28 volts across both or all three lugs on the coils. But none are firing. Unplugged the play field and back box jones plugs, and while of course the pf coils now read zero, the cabinet switches still show voltage on all leaves of the switches, except for the start switch which reads as noted above.
Not sure if these two problems are related or separate. Can't find any switches that look closed when should be open. Can't find any obvious wires that are disconnected, shorted, etc. but could have missed something.
Any suggestions would be appreciated.