how to fix wiring problems with a 94 chevy beretta Mar 18, 2007I just bought a 94 chevy beretta. Its in really nice condition. There is a problem with the wiring tho. I guess the previous owner had a problem with either the relay for the fan or the temperature gauge because he completly bypassed the relay with a light gauge wire so Status: Open 94 chevy truck: Dually.a wiring schematic for that - ASAP What i need is a wiring schematic for ModelDescription GMT-400 K3500 ID 1GBJK34N1RE240300 94 Chev Truck Body Type TK Model GK3. Ive found the wire or two that is causing drain but there connected to panel of relays which I eliminated one thinking I solve the problem.