Chevrolet Chevy Express G2500 (1996-2012) hot w/ pwr/trn relay 49 energized Wiring diagrams

21 19 69 14 71 CTRL SPD SIG CTRL SPD SIG SPEED SIG BLK WIRE BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLANT LEVEL SWITCH COOLING FAN ASSEMBLY (BEHIND RADIATOR) DK BLU WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY ENGINE CONTROL MODULE (ECM) ENGINE COOLANT GAUGE TEMPERATURE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP OF ENGINE, NEAR THERMOSTAT HOUSING) FAN CLTCH (EV) FUSE 63 GRY WIRE HOT W/ PWR/TRN RELAY 49 ENERGIZED INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOW REF LOW SPD GMLAN SERIAL DATA LT GRN WIRE PNK WIRE SENS SIG LOW REF TAN WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

12 13 34 28 27 25 8 65 43 44 59 36 63 66 46 PRESS SENS LOW REF 19 21 69 14 71 CTRL SPD SIG CTRL SPD SIG SPEED SIG 21 22 58 4 24 40 SENS SIG LOW REF 6.6L 4.3L 4.8L, 5.3L, 6.0L A/C CMPRSR FUSE 18 A/C CMPRSR RELAY 40 A/C COMPRESSOR CLUTCH A/C REFRIGERANT PRESSURE SENSOR A/C SERIAL REQUEST DATA SIG BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN/WHT WIRE CLUTCH RLY CTRL COMPUTER DATA LINES SYSTEM COOLING FAN ASSEMBLY (6.6L) (BEHIND RADIATOR) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) ENGINE COOLANT TEMPERATURE (ECT) SENSOR FAN CLTCH (EV) FUSE 63 GMLAN - GMLAN + GMLAN DATA GRY WIRE HOT AT ALL TIMES HOT W/ PWR/TRN RELAY 49 ENERGIZED LOW REF LT BLU WIRE LT GRN WIRE OF ENGINE) ORG/BLK WIRE PNK WIRE REF SIDE OF ENGINE COMPT) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT W/ AUXILIARY FUEL FIRED HEATER W/O AUXILIARY FUEL FIRED HEATER WHT (OR RED) WIRE WHT/BLK WIRE YEL WIRE

19 21 69 14 71 CTRL SPD SIG CTRL SPD SIG SPEED SIG 24 40 58 4 21 22 SENS SIG LOW REF 59 36 63 66 46 25 8 65 43 44 12 13 34 28 27 PRESS SENS LOW REF 6.6L 4.3L 4.8L, 5.3L, 6.0L A/C CMPRSR FUSE 18 A/C CMPRSR RELAY 40 A/C COMPRESSOR CLUTCH A/C REFRIGERANT PRESSURE SENSOR A/C SERIAL REQUEST DATA SIG BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN/WHT WIRE CLUTCH RLY CTRL COMPUTER DATA LINES SYSTEM COOLING FAN ASSEMBLY (6.6L) (BEHIND RADIATOR) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) ENGINE COOLANT TEMPERATURE (ECT) SENSOR FAN CLTCH (EV) FUSE 63 GMLAN - GMLAN + GMLAN DATA GRY WIRE HOT AT ALL TIMES HOT W/ PWR/TRN RELAY 49 ENERGIZED LOW REF LT BLU WIRE LT GRN WIRE OF ENGINE) ORG/BLK WIRE PNK WIRE REF SIDE OF ENGINE COMPT) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT W/ AUXILIARY FUEL FIRED HEATER W/O AUXILIARY FUEL FIRED HEATER W/O AUXILIARY FUEL FIRED HEATER W/ AUXILIARY FUEL FIRED HEATER WHT/BLK WIRE YEL WIRE