What the solenoid test numbers mean
The solenoid test fires coils 01 to 22. On System 3 to 6, coils 9 to 13 normally drive the sound board, not playfield coils. System 7 also tests 23, 24 and 25: 25 is the flipper relay and 23/24 are unused on every System 7 game. Coils 17 to 22 are the special solenoids (pops and slings), which have a second, playfield trigger path, so test them with their playfield switches as well.
Systems
Related tips
- Some devices do not move in the solenoid test
- No solenoid voltage
- CPU-controlled and special solenoids
- Coil sleeve part numbers for System 3-7
- Special solenoid trigger test at 2J12/2J13
- Parts on a special solenoid trigger switch
- House-numbered coils need the chart, not the number
- Solenoid driver test at 2J9 and 2J11 with Leon's code
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Three, Clay Harrell (pinrepair.com)