Join Date: Sep 2001
Location: Temple City, Ca
No schematic but the Haynes Camaro book has the basic one for that year. Pep Boys sells these.
The problem sounds like it's around the headlight switch. Here's the wire colors and what they do.
Red - always hot - powers "blue" for headlights
Blue - to headlight dimmer switch
White - grounds for interior lights
Orange - fused power to dash lights/running lights - (powers green and brown)
Green - to dash lights
Brown - to running lights front and rear.
If you have dash lights then the input fused orange wire is good. I'd check power on the brown wire to see if it has 12 volts on it when the switch is on. If the switch is bad these are over the counter parts or can be pulled from just about any 70s GM car or truck.