A2 and A3 plug wire colours

A2J1 raw power in: red/black/black on pin 1, white on pin 2. A2J2 +5 V out: blue/gray/gray on pins 1 and 2. A3J1 power: white, blue/gray/gray. A3J3 strobes: violet/orange/orange, violet/red/red. A3J4 lamp returns: gray/black/black, gray/brown/brown. A3J5 sols 0-15: red/black/black, red/brown/brown. A3J6 sols 16-31: green/black/black, green/brown/brown. A3J7 ground: white, white.

Systems

• Gottlieb System 3

Related tips

• Gottlieb wire colour number code
• Ground fix: tie each ground plug's wires together
• Spare MosFETs for the driver boards
• Logic chips worth stocking
• What the A3 driver board drives
• Lamp and switch matrix size and drivers
• Bottom cabinet relays and their drivers
• Flippers dead in a game

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