{"product_id":"williams-system-3-11-coil-flasher-harness-tester-coming-soon-williams-data-east-sega","title":"Williams System 3–11 Coil \/ Flasher Harness Tester — Coming Soon (Williams, Data East, Sega)","description":"\u003cp data-lfile-container=\"1caa4aec-4e1b-4b2d-821e-244b549306e8\" data-pm-slice=\"1 1 []\"\u003eThis is the third tool in the harness-tester family, alongside the \u003ca href=\"https:\/\/thatoldpinball.com\/products\/williams-system-3-11-data-east-switch-matrix-harness-tester\" title=\"Switch Matrix Harness Tester\"\u003eSwitch Matrix Harness Tester\u003c\/a\u003e and \u003ca href=\"https:\/\/thatoldpinball.com\/products\/williams-system-3-11-data-east-sega-lamp-matrix-harness-tester-rotary-switch-lamp-diagnostic-tool\" title=\"Lamp Matrix Harness Tester\"\u003eLamp Matrix Harness Tester\u003c\/a\u003e: 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.\u003c\/p\u003e\n\u003cp\u003eA 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere this stands today:\u003c\/strong\u003e 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, \u003ca href=\"https:\/\/thatoldpinball.com\/policies\/contact-information\"\u003eContact me\u003c\/a\u003e, and we'll let you know.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible with:\u003c\/strong\u003e Williams System 3, 4, 6, 7, 9, and 11 (11A, 11B, 11C); Data East; Sega.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePrice: TBD — not yet available for purchase. SKU: CFHT-SYS311 (reserved; not yet stocked).\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/egYKOawKOXU?si=550W70pJiZYglgyN\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"That Old Pinball","offers":[{"title":"Default Title","offer_id":68119809589544,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0861\/0037\/7896\/files\/CoilFlasherHarnessTester.jpg?v=1793929657","url":"https:\/\/thatoldpinball.com\/products\/williams-system-3-11-coil-flasher-harness-tester-coming-soon-williams-data-east-sega","provider":"That Old Pinball","version":"1.0","type":"link"}