Looking for a GM tech that can send me a A/C wiring diagram for a 92 Buick Roadmaster 5.7l with climate control. The haynes manual I have is pretty sparce on the system. We have NO power going to the relays inside the engine compartment. So we think it must be under the dash somewhere. The fan/heater works just no A/C....If anybody has access to the factory diagrams It would be GREATLY appreciated!! This is the wifes car and she has to have the A/C...Can't drive with the windows down it might mess her hair up