1996 riviera temperature control module and stereo wiring

I have a 1996 Riviera and had new panasonic recevier w Sirrus installed. The day after my temperature control panel would work intermittantly, not light up then completely stopped working. It seems the blower shoots sometimes warm sometimes cool air through front defroster. I took out the control module out and wanted to get it checked. I also wanted to get a wiring schematic for the the temp module and stereo so I could check things myself. I don't have the funds now to just take it in the shop. Any suggestions?:uhoh:

Take it back to the “Goober” that installed the system, obviously he screwed something up!