Williams System 3–11 Coil / Flasher Harness Tester — Coming Soon (Williams, Data East, Sega)

This is the third tool in the harness-tester family, alongside the Switch Matrix Harness Tester and Lamp Matrix Harness Tester: it actively drives real coils and flashers directly through the playfield harness, so you can confirm a coil, flasher, or driver circuit is actually firing — without re-wiring the whole machine or chasing the fault back to the MPU/driver board.

A single 8-position rotary switch selects one of 8 channels, routed through header footprints matching the Regular Solenoid and Special Solenoid connectors used across Williams System 3–11, Data East, and Sega platforms (only one header plugged in at a time, matching whichever circuit you're testing). Like the rest of the harness-tester line, it works just as well on a playfield that's off the cabinet — on a restoration rotisserie, say — as it does installed.

Where this stands today: this is a working prototype (V1), not yet ready to sell — we're still finalizing cost and a few build details before it's offered for purchase. If you'd like one when it ships, Contact me, and we'll let you know.

Compatible with: Williams System 3, 4, 6, 7, 9, and 11 (11A, 11B, 11C); Data East; Sega.

Price: TBD — not yet available for purchase. SKU: CFHT-SYS311 (reserved; not yet stocked).