Hummer H3 I (2005-2010) logic Wiring diagrams

ABS IND. ACCESSORY SWITCH BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND RIGHT FRONT KICK PANEL) BRAKE IND BRN WIRE BRN/WHT WIRE CAN L CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL CLASS CLASS 2 (EBCM) 2 (EBCM) DELIVERED TORQUE SIGNAL DK BLU WIRE DRIVER INFO CENTER INSTRUMENT PANEL CLUSTER (IPC) ENGINE CONTROL MODULE (ECM) (RIGHT REAR CORNER OF ENGINE COMPT) GRY WIRE HOT W/ HVAC RELAY ENERGIZED IGN IGN 3 VOLT LOGIC LT BLU WIRE LT GRN WIRE ORG/BLK WIRE PARK BRAKE SWITCH PARK BRK SW SIG PPL PPL CLASS 2 SERIAL DATA PPL DATA LINK CONNECTOR (DLC) (LEFT SIDE OF DASH) PULSE SIG STEERING REQUESTED TORQUE SIGNAL SIG A STEERING STABILITY CAUTION IND STEERING SIG B STOP LP VOLT TAN/BLK WIRE TRAC CTRL SW SIG TRACTION CONTROL SWITCH UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) VSES/ABS FUSE 52 WHT WIRE YAW, LATERAL ACCELEROMETER SENSOR (W/ ACTIVE BRAKE CONTROL) (UNDER DRIVER

1807 1807 PPL PPL SERIAL DATA SERIAL DATA A/C REQ SIG 53 15 RLY CTRL SERIAL DATA PPL 57 37 21 PRESS SENS SIG A/C CLUTCH DIODE 90 A/C CLUTCH RELAY 76 A/C COMPRESSOR CLUTCH (PART OF A/C COMPRESSOR) A/C ON IND LOW REF A/C ON SWITCH EVAP TEMP SIG A/C REFRIGERANT PRESSURE SENSOR (ON HIGH PRESSURE HOSE CONNECTION TO COMPRESSOR) A/C REQ SIG AC CLUTCH FUSE 48 BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND RIGHT FRONT KICK PANEL) COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (RIGHT REAR CORNER OF ENGINE COMPT) EVAPORATOR TEMPERATURE SENSOR (BEHIND RIGHT LOWER DASH) GRY WIRE HOT AT ALL TIMES HOT W/ RUN/ CRANK RELAY 78 ENERGIZED HVAC CONTROL MODULE (BENEATH RADIO) LOGIC LOW REF MANUAL A/C CIRCUIT PPL RED/BLK WIRE UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) YEL WIRE

1 10 11 4 PPL PPL 5 VOLT REFERENCE 2 6 7 38 37 GMLAN HI (+) GMLAN HI (-) GMLAN HI (+) GMLAN HI (-) 66 67 VSS HIGH SIGNAL VSS LOW SIGNAL 7 29 2 STOP LAMP CONTROL CRUISE CONTROL SWITCH CRUISE CONTROL RELEASE SIGNAL A/T ACCELERATOR PEDAL POSITION (APP) SENSOR (ON ACCELERATOR PEDAL BRACKET) B+ CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA GND BLK WIRE BLK/WHT WIRE BRN WIRE CLSTR FUSE 19 COMPUTER DATA LINES SYSTEM CRUISE CONTROL ON/OFF SWITCH CRUISE CONTROL RELEASE SWITCH CRUISE INDICATOR CRUISE/MISC FUSE 35 DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (RIGHT REAR OF ENGINE COMPARTMENT) GRY WIRE HOT AT ALL TIMES HOT W/ RUN/ CRANK RELAY ENERGIZED LOGIC LOGIC INSTRUMENT PANEL CLUSTER (IPC) LOW REFERENCE LT BLU WIRE LT GRN/BLK WIRE M/T MOUNTED ON UPPER AIR INTAKE MANIFOLD) ON OFF ORG/ WIRE PNK PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL CLASS 2 SERIAL DATA PPL TP SENSOR 2 SIGNAL PPL/WHT WIRE RES+ SET- STOP FUSE 54 STOP LAMP SWITCH (ABOVE BRAKE PEDAL ASSEMBLY) TAC MOTOR CONTROL-1 TAC MOTOR CONTROL-2 TAN WIRE TAN/WHT WIRE THROTTLE BODY (TOP OF ENGINE) TP SENSOR 1 SIGNAL TRANSMISSION CONTROL MODULE (TCM) TURN SIGNAL/MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) VEHICLE SPEED SENSOR (VSS) (LEFT REAR OF TRANSFER CASE) VSS HIGH SIGNAL VSS LOW SIGNAL WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND RIGHT FRONT KICK PANEL) DEFOGGER INDICATOR HOT AT ALL TIMES HVAC CONTROL MODULE (BENEATH RADIO) IND CTRL LOGIC LT BLU WIRE R/WDO DEFG FUSE 30 REAR DEFOG INDICATOR CTRL REAR DEFOG SWITCH SIG REAR DEFOGGER SWITCH GROUND REAR WINDOW DEFOGGER RELAY CNTRL RR DEFOG RELAY 71 SW SIG TAN WIRE UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) WHT WIRE

AMBIENT AIR TEMP SENSOR LOW REF AMBIENT AIR TEMPERATURE SENSOR (ATTACHED TO FRONT CENTER OF RADIATOR SUPPORT) BARE BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CRUISE/ MISC FUSE 35 DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE EMERGENCY SWITCH GREEN LED HOT AT ALL TIMES HOT IN RUN OR START UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) IGN INSIDE REARVIEW MIRROR KEYPAD CTRL KEYPAD GREEN LED SIG KEYPAD RED LED SIG WIRE LOGIC LT BLU WIRE LT GRN/BLK WIRE NAVIGATION SYSTEM ONSTAR BUTTON ASSEMBLY ONSTAR SWITCH PHONE SWITCH RED LED WIRE RUN/ CRNK RELAY 78 SIG KEYPAD SUPPLY VOLT YEL WIRE YEL/BLK WIRE

12 15 MIL SERIAL DATA PPL 2 59 60 PPL SERIAL DATA SEAT BELT SW SEAT BELT SW 24 40 LOW REF 5 VOLT REF 1 3.7L 44 27 PPL PNK SERIAL DATA BRK FLUID LVL WIRE 5.3L 8 9 10 11 12 13 14 15 16 17 18 CHARGING IND ABS IND. ACCESSORY SWITCH AIR BAG IND BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND RIGHT FRONT KICK PANEL) BRAKE FLUID LEVEL SWITCH (ON LEFT SIDE OF BRAKE FLUID RESERVOIR) BRAKE IND BRN/WHT WIRE CHIME CLSTR FUSE 19 COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM 1807 238 CRUISE IND DK BLU WIRE DRIVER INFORMATION CENTER (DIC) DRIVER SEAT BELT BUCKLE DRIVER SEAT BELT SWITCH ECT SENSE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (LEFT OF MASTER CYLINDER) ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPER- ATURE GAUGE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT LEFT OF ENGINE) ENGINE OIL PRESSURE (EOP) SWITCH (3.7L) (ABOVE OIL FILTER) FUEL GAUGE FUEL PUMP, SENDER ASSEMBLY (MOUNTED ON TOP OF FUEL TANK) GRY WIRE HIGH BEAM IND 1 2 3 4 5 6 7 HOT AT ALL TIMES IGN ILLUMINATION (4 BULBS) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (BENEATH LOWER CONSOLE) INSTRUMENT PANEL CLUSTER (IPC) LEFT TURN IND LOGIC LOW REF LOW TIRE PRESSURE IND LT BLU WIRE MALFUNCTION IND NCA WIRE OIL GAUGE OIL PRESS OIL PRESSURE IND ORG/ WIRE PARK BRAKE SWITCH (LEFT LOWER SIDE OF DASH) PASSENGER SEAT BELT BUCKLE PASSENGER SEAT BELT SWITCH PASSENGER SEAT BELT IND PNK WIRE PPL PPL FUEL LEVEL PPL PPL PPL PPL SERIAL DATA SERIAL DATA PRK BRK SW SERIAL DATA PPL RED WIRE RIGHT TURN IND SEAT BELT IND SECURITY IND SENSOR SIG SERIAL DATA SERIAL DATA GROUND BATTERY SPEEDO- METER TACHO- METER TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRACTION CONTROL IND TRIP ODOMETER TRIP RESET SWITCH UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) UP SHIFT IND VOLTS WHT WIRE YEL WIRE

1807 1807 COMPUTER DATA LINES SYSTEM A/C ON IND MODE SWITCH A/C ON SWITCH BLK WIRE BLK/WHT WIRE BLOWER MOTOR (BELOW RIGHT SIDE OF DASH) BLOWER MOTOR RESISTOR ASSEMBLY (ATTACHED TO BOTTOM OF BLOWER) BLOWER MOTOR SWITCH BRN WIRE DEFOG SW SIG DEFOGGER SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRD GRD DIMMER SW SIG A/C RECIR REQ SIG DEFOG IND CCTRL A/C REQ SIG GRY WIRE HIGH SPEED BLOWER MOTOR RELAY (ATTACHED TO BLOWER MOTOR CASE) HOT AT ALL TIMES HVAC BLWR FUSE 82 HVAC CNTRL HD FUSE 59 HVAC CONTROL MODULE (BENEATH RADIO) HVAC RELAY 87 IGN 3 VOLT IGN RLY CTRL A/C REQ SIG A/C RECIR REQ SIG SERIAL DATA SERIAL DATA IN MAIN BUNDLE) LOGIC LOW OFF LOW REF MODE DOOR SIG EVAP TEMP SIG R AIR TEMP SIG L AIR TEMP SIG LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PNK PPL PPL WIRE PNK WIRE RDO FUSE 13 RECIR- CULATION SWITCH RECIRC A RECIRC B MODE DOOR B R AIR TEMP B AIR TEMP A L AIR TEMP B RED/BLK WIRE TAN WIRE TAN/BLK WIRE TEMPERATURE SWITCH RECIR- CULATION IND UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) WHT WIRE YEL WIRE

3.7L 5.3L 53 15 RLY CTRL SERIAL DATA PPL 55 35 ECT SENS SIG LOW REF 57 37 21 PRESS SENS SIG A/C CLUTCH DIODE 90 A/C CLUTCH RELAY 76 A/C COMPRESSOR CLUTCH (PART OF A/C COMPRESSOR) A/C REFRIGERANT PRESSURE SENSOR (ON HIGH PRESSURE HOSE CONNECTION TO COMPRESSOR) AC CLUTCH FUSE 48 BLK WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (RIGHT REAR CORNER OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT LEFT OF ENGINE) EVAPORATOR TEMPERATURE SENSOR (BEHIND RIGHT LOWER DASH) GRY WIRE HOT AT ALL TIMES HOT W/ RUN/ CRANK RELAY 78 ENERGIZED LEFT AIR TEMPERATURE ACTUATOR LOGIC LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MODE ACTUATOR (ON SIDE OF HEATER BOX) NCA WIRE RECIRCULATION ACTUATOR (UPPER RIGHT CORNER OF HEATER CASE) RED/BLK WIRE RIGHT AIR TEMPERATURE ACTUATOR (MOUNTED TO RIGHT SIDE OF HVAC MODULE ASSEMBLY) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) YEL WIRE

ALL DOORS LOCK CTRL ALL DOORS UNLOCK CTRL BATTERY BCM FUSE 14 BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND RIGHT FRONT KICK PANEL) COMPUTER DATA LINES SYSTEM DK BLU WIRE DOOR UNLOCK DRIVER DOOR LOCK ACTUATOR (IN CENTER REAR OF DRIVER DOOR, NEAR DOOR LATCH) DRIVER DOOR LOCK/ WINDOW SWITCH DRIVER DOOR UNLOCK CTRL DRIVER UNLOCK RELAY FRT TURN/ HAZRD/CTSY MIR FUSE 56 GROUND GRY WIRE HOT AT ALL TIMES LEFT REAR DOOR LOCK ACTUATOR (IN CENTER REAR OF LEFT REAR DOOR, NEAR DOOR LATCH) LIFTGATE DOOR LOCK ACTUATOR (ON RIGHT SIDE OF LIFTGATE) LOCK LOCK RELAY LOCK SW LOCK UNLOCK LOGIC LT BLU WIRE ORG/ WIRE PASSENGER DOOR LOCK ACTUATOR (IN CENTER REAR OF PASSENGER DOOR, NEAR DOOR LATCH) PASSENGER DOOR LOCK/ WINDOW SWITCH PPL PPL PPL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PWR/ LKS FUSE 8 REAR TRN/ HAZRD FUSE 20 TAN WIRE UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) UNLOCK UNLOCK CTRL UNLOCK RELAY WHT WIRE

AIR PUMP FUSE 62 AIR SOL FUSE 44 AIR SOL RELAY 80 BLK WIRE BRN WIRE BRN/WHT WIRE CLSTR FUSE 19 DK BLU/WHT WIRE DK GRN/WHT WIRE ENGINE OIL IND ETC FUSE 46 FUSE 47 EVAPORATIVE EMISSION (EVAP) CANISTER VENT SOLENOID VALVE (ABOVE SPARE TIRE) FUEL PUMP RELAY 66 FUEL PUMP, SENDER ASSEMBLY (MOUNTED ON TOP OF FUEL TANK) FUEL/PUMP FUSE 3 GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER (IPC) LOGIC MIL IND NCA WIRE ORG/ WIRE PCM-B FUSE 25 PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL PPL COMPUTER DATA LINES SYSTEM PWR/TRN RELAY 81 RED WIRE SECONDARY AIR INJECTION (AIR) PUMP RELAY (TOP OF ENGINE, AT REAR OF INTAKE) SERIAL DATA (-) SERIAL DATA (+) UNDERHOOD FUSE BLOCK (ABOVE LEFT FRONT WHEELWELL) UP SHIFT IND WHT WIRE YEL WIRE