GMC Savana Camper Special G3500 (1996-2011) Automatic day/night mirror circuit

AMB AIR TEMP SENS SIG LOW REF AMB LGHT SENSOR REAR LGHT SENSOR AMBIENT AIR TEMPERATURE SENSOR (BEHIND FRONT GRILLE, ON RADIATOR SUPPORT) BACKUP LAMP PWR BLK WIRE BODY CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) ELECTRO- CHROMIC EXTERIOR LIGHTS SYSTEM (W/ PASSENGER/ CARGO) GRN WIRE GROUND HOT IN RUN AND START IGN 1 VLT INSIDE REARVIEW MIRROR ISRVM FUSE 26 LOGIC BACKUP LAMP PWR LT GRN WIRE PNK WIRE SELECTOR SW TAN WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE