I'm putting a wiring harness from a 1990 f150 into a 1987 F150. There's 2 reasons for this. Th '7 engine harness looks like an explosion in a spagetti factory. The othr reason is I replaced the C6 with a AOD/AOT transmission. The problem is connecting all the undercarriage wires to this harness. Apparently I'll be doing some dice and splice. Does anyone know where I might find wiring diagrams for the 87 and the 90 online? Any help would be appreciated.

 

You need to get a repair manual for your vehicle... Has all the wiring diagrams, vacuum diagrams, etc...