Transfer case circuit, 2-speed automatic for GMC Sierra 2500 (2000-2004)

2-HI IND 4-HI IND 4-LO IND ATC FUSE AUTO AUXILIARY BATTERY RELAY B+ MOTOR (CCW) MOTOR (CW) GND BLK WIRE BLK/WHT WIRE BODY RELAY BLOCK (UNDER LEFT SIDE OF DASH) BRAKE CONTROL BRN WIRE BRN/WHT WIRE CONTROL MODULE CTRL DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENCODER LOGIC ENCODER MOTOR ENCODER RTN FRONT AXLE ACTUATOR FRONT PROP- SHAFT SPEED SENSOR FT SHAFT SIG FT SHAFT RTN FUSE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN HOT IN RUN, START ILLUMINATION LAMP (2) INSTRUMENT PANEL CLUSTER LAMP LEFT I/P FUSE BLOCK (LOWER LEFT SIDE OF DASH) LOCK SOL OUT LOGIC LT BLU WIRE LT GRN/BLK WIRE MODULE GND 4-LO IND 4-HI IND NEUTRAL IND FT AXLE CTRL RR SHAFT SIG RR SHAFT RTN NCA WIRE NEUTRAL IND ORG/ WIRE PNK WIRE PPL PPL/WHT WIRE REAR PROP- SHAFT SPEED SENSOR RED WIRE RED/WHT WIRE REF RUN WIRE SHIFT MOTOR SOLID STATE SPLICE PACK TAN WIRE TAN/BLK WIRE TRANSFER CASE SHIFT CONTROL MODULE (BEHIND HEADLAMP SWITCH) TRANSFER CASE SHIFT CONTROL SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT, NEAR BATTERY) YEL WIRE YEL/BLK WIRE