Transfer case circuit, selectable for GMC Sierra 3500 (2002-2006)

2-HI IND 2-HI IND CHANNEL-P CHANNEL-C CHANNEL-B CHANNEL-A CLASS II DATA IGN 3 (RUN) 4-HI IND 4-LO IND ATC FUSE AUXILIARY BATTERY RELAY B+ MOTOR (CCW) MOTOR (CW) GND BLK WIRE BLK/WHT WIRE BODY RELAY BLOCK (UNDER LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CTRL DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DSL (ECM) GAS (PCM) ENCODER LOGIC ENCODER MOTOR ENCODER RTN FRONT AXLE ACTUATOR 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) LOGIC LT BLU WIRE LT GRN/BLK WIRE MODULE GND 4-LO IND 4-HI IND NEUTRAL IND FT AXLE CTRL NCA WIRE NEUTRAL IND ORG/ WIRE PNK WIRE PPL PPL/WHT WIRE RED WIRE RED/WHT WIRE REF RUN WIRE SHIFT MOTOR SOLID STATE SPLICE PACK 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/BLK WIRE