Gotta rewire the truck, any good reference sites?

[Russell]

Hey guys/gals! How goes it?

Anyways, the electrical issues are starting to build up in the truck (no dome light, no underdash light, no box light, lights coming on and off in the instrumentation, stereo blown, horn fused on, no reverse lights and my cruise doesn't work) and I figure its time to get busy and rewire that thing to fix some of the hacking that my uncle did. What I need is a couple of diagrams for it, I checked that online chiltons site, but those diagrams are next to impossible to read becuase they are so badly shrunk.

Its a 1980 C2500 2WD LWB, Sierra Classic with the 5.7 L V8.