1998 Ford F150 Alternator Wiring We have been working on a Dec 31, 20161998 Ford F150 Alternator Wiring We have been working on a 1998 F150. Where is the location to connect the alternator to the pcm?black/org to starter org/lt blue to Hi, My name is***** you still need help with the alternator wiring? What engine do you have in your 1998 F150?Sorry for the delay. My internet was down for a few hours. I need to know what engine you have so I can look up the correct wire diagram? 1998 F150 did not have a 5.0 in this year. Do you have the 4.2, 4.6 or 5.4 engine?The alternator wiring does not go to the computer at all no matter what engine you have. The white with black stripe wire goes between the S and S terminals on the alternator. You have two S terminals on the alternator and the white /black wire connects them together.Here is a wire diagram you can see. If you have no other question then please accept answer and rate my answers 5 STARS. Thanks. http://ww2answer/uploads/fordguy4u/2012-02-08_232944_a1 99 Ford F150 Charging System Wiring Diagram - tutej 99 ford f150 charging system wiring diagram on chevy wiring diagram truck also automotive alternator boat electronics rh pinterest. T. 99 Ford F150 Charging System Wiring Diagram . Ford alternator wiring diagram trusted rh soulmatestyle co truck also ranger charging library rmiafilmfestival.