Ford Alternator Wiring Diagrams - Carsut Ford Alternator Wiring Schematic This is a basic Ford alternator wiring schematic with external regulator. It consists the back view of a standard Ford alternator, with and without warning light. It is very useful if you would like to know the fused power, voltage regulator, ignition warning and others. 1987 Ford F250 Alternator Wiring Diagram | Diagram May 30, 20191987 Ford F250 Alternator Wiring Diagram. Posted on May 30, 2019 by admin. 85 steering column wiring diagram ford truck data 78 f150 ignition 87 94 1999 ford f 250 alternator wiring data diagrams1999 diagram 99 ford f 250 wiring diagram alt bestwiring for 1985 f250 box.