>>I posted another wiring diagram today and updated an existing one. The >>new one is for the '75 motorhome with HEI ignition. The updated one is >>the '75 motorhome with breaker points ignition. > >oops not working yet They're working. The problem is your browser. MS Internet Explorer will not open a graphics file over a certain size.. Although the schematic is in black and white, the color of each wire is noted. You will not find this diagram in your shop manual. The schematic measures 8.5" x 11" when folded up and opens up to 11" by 38". Buy now for the best electrical repair info - the factory wiring diagram.
Including wire/circuit diagrams, cruise control (Rostra), lightbulb usage, living on 12 volt and the battery charger.. When available, contribution credits are listed. We welcome all historical and technical information related to the GMC Motorhome. Please submit. 1973 GMC Maintenance Manual) 1975. 1975 | Avion 12v (Source: Avion.. GMC Motorhome Wiring Diagrams . In order to make these diagrams easy to read and follow, they're very large files. I suggest you download them to your machine.. November 1975 (148kb) 1975 / 1976 120v AC (Effective with TZE165V100893) November 1975 (161kb) Chassis Area. 1975 with Breaker Points (457kb) 1975.