I have a 1999 Ford Ranger, and am in need of the electrical schematics
(wiring diagrams) so that I can troubleshooot a problem I have with a
four wire trailer lighting system.

The running lights work, but the turn signals, brake lights, and
flasher signals do not work.

Does anyone know where I can purchase the factory electrical wiring
manual for this Ford Ranger?

Thanks for any help,

Bob