1977 ford f250 alternator wiring diagram - Fixya SOURCE: Replacing a alternator on a 1987 Ford F250-Need wiring schametic. Below is a link to the wiring diagram on a F-250 with 5 (302ci). Best of luck. Greg Wiring Diagram Schematic 1987 F-250. Posted on Jan 20, 2010 1977 Ford F250 Stator Wire, Short to Power, but I Cant Loca 1977 Ford F-250 stator wire, short to power, but I cant loca. NCHANNER MEMBER; 1977 FORD F-250 If its charge indicator the stator S terminal of the alternator goes straight to the regulator S terminal. There Is No Black And White Wire Coming From Voltage Regulator To The Alternator. There Is The Field Wire. However There Is A Yellow Wire..