Ground fix: bolt grounds straight to the transformer frame

Steps

• Power off and unplug the game.
• Cut the factory plugs off the four harnesses that mate with the A18 ground board.
• Crimp each bundle of ground wires into one large ring terminal.
• Bolt the terminals directly to the A12 transformer frame.

Line voltage is present in the power box and transformer panel; unplug the game first.

Systems

• Gottlieb System 3

Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)