F150 Wiper motor

I have a 1987 F150 which I purchased used. Someone has jerry rigged the electrical under the hood and the wiper harness has been cut. Where can I get a schematic for the wiper motor itself, so I can run a different harness? The 302 has been replaced with a 351, so the original harness won't work. Wiper motor part number is 93-0544-40.

Thanks!

Haynes repair manual has good wire schematics.
Truck is 18 years old and someone else has played under the hood.Manual is a must have.