Better wiring diagrams - Manuals

[KARL E KRUEGER <kkrueg01@medlib.iaims.georgetown.edu>]

Can anyone tell me where I could get a hold of more info for the wiring
of an 86' 5000 S? I currently have the Haynes manual which only provides
a detailed diagram of the Auto-Chek unit for a turbo. There is nothing
for the normal model and the wiring is much different than that of the
turbo. I presume this unit is behind the glove compartment in my car.
For now I am trying to identify the wire to control the brake pad
sensor light.

Also where exactly is the grounding harness for the brake pad sensor?
What I thought was going to be a simple project is turning into a lot of
frustration weeding through tons of wires cramped in a small space.