Chevrolet Cobalt I (2004-2010) (left side of engine compt, under coolant reservoir) Wiring diagrams

30 43 44 25 RLY CTRL SERIAL DATA SERIAL DATA PRESS SENS SIG 58 4 ECT SIG LOW REF A/C CLUTCH FUSE A/C CLUTCH RELAY A/C COMPRESSOR CLUTCH (LEFT FRONT OF ENGINE) A/C COMPRESSOR CLUTCH DIODE A/C REQ SIG GND BATT IGN 1 VOLTAGE A/C REQUEST INDICATOR A/C REQUEST SIG A/C REQUEST SWITCH BLK WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE (ECT) SENSOR FUSE 10 LOGIC GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT W/ RUN/ CRANK RELAY ENERGIZED HVAC CONTROL MODULE (CENTER OF DASH, BELOW RADIO) HVAC/ IP IGN FUSE 16 LOGIC LOW REF LT GRN WIRE ORG/BLK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL/WHT WIRE RED/WHT WIRE SERIAL DATA TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, NEXT TO LEFT STRUT TOWER) YEL WIRE

58 4 ECT SIG LOW REF A/C CLTCH FUSE A/C COMPRESSOR CLUTCH DIODE A/C CLUTCH RELAY A/C COMPRESSOR CLUTCH (LEFT FRONT OF ENGINE) AIR TEMPERATURE ACTUATOR (CENTER OF DASH, LEFT SIDE OF HVAC MODULE) BLK WIRE BLK/WHT WIRE BLU WIRE COMPUTER DATA LINES SYSTEM COOLING FAN 1 FUSE COOLING FAN 1 RELAY COOLING FAN 2 FUSE COOLING FAN 2 RELAY DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (REAR OF ENGINE, NEAR EXHAUST MANIFOLD) ENGINE COOLING FAN (FRONT OF ENGINE COMPT, ATTACHED TO RADIATOR) GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START LOW REF LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MODE ACTUATOR (CENTER OF DASH, LEFT SIDE OF HVAC MODULE) ORG/BLK WIRE PNK PNK WIRE PNK WIRE PNK/WHT WIRE PPL/WHT WIRE RECIRCULATION ACTUATOR (RIGHT SIDE OF DASH, ABOVE BLOWER MOTOR) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, NEXT TO LEFT STRUT TOWER) WHT/BLK WIRE YEL WIRE

43 44 25 SERIAL DATA SERIAL DATA PRESS SENS SIG 58 4 ECT SIG LOW REF A/C CLUTCH RELAY A/C COMPRESSOR CLUTCH (LEFT FRONT A/C COMPRESSOR CLUTCH DIODE A/C REQ SIG GND BATT IGN 1 VOLTAGE A/C REQUEST INDICATOR A/C REQUEST SIG A/C REQUEST SWITCH AC CLTCH FUSE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE FUSE 10 GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT W/ RUN/ CRANK RELAY ENERGIZED HVAC CONTROL MODULE (CENTER OF DASH, BELOW RADIO) HVAC/ IP IGN FUSE 16 LOGIC LOW REF LT GRN WIRE OF ENGINE) ORG/BLK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM RED/WHT WIRE RLY CTRL SERIAL DATA TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, NEXT TO LEFT STRUT TOWER) YEL WIRE

ABS 2 FUSE ABS 3 FUSE ABS FUSE BAT POSITIVE VOLT BLK WIRE BRAKE PRESSURE MODULATOR VALVE BRN WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE HOT AT ALL TIMES HOT IN RUN OR START LEFT FRONT WHEEL SPEED SENSOR (WSS) (INSIDE LEFT FRONT WHEEL HUB) LF WHEEL SPEED REF LF WHEEL SPEED SIG LT BLU WIRE ORG/ WIRE PNK WIRE PUMP MOTOR PUMP MOTOR CONTROL RED WIRE RED/BLK WIRE RED/WHT WIRE RF WHEEL SPEED SENS SIG RF WHEEL SPEED SENS LO REF RIGHT FRONT WHEEL SPEED SENSOR (WSS) (INSIDE RIGHT FRONT WHEEL HUB) RIGHT REAR WHEEL SPEED SENSOR (WSS) (INSIDE RIGHT REAR WHEEL HUB) RR WHEEL SPEED SEN SIG RR WHEEL SPD SEN REF TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, NEXT TO LEFT STRUT TOWER) WHT WIRE YEL WIRE

2 20 SERIAL DATA + SERIAL DATA - 28 747 746 1250 748 745 744 5531 109 HORNS SYSTEM 43 44 GMLAN SERIAL DATA + GMLAN SERIAL DATA - ACC VOLT SIG ACC VOLT SUPPLY BATT POS VOLT BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) BRN WIRE CLSTR FUSE 7 COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER RIGHT REAR DOOR JAMB SWITCH DOOR JAMB SWITCH FUSE 10 GMLAN SERIAL DATA GRN WIRE GROUND GRY WIRE GRY/BLK WIRE HAZARD SW SIG HOOD AJAR SWITCH (W/ KEYLESS ENTRY) (FRONT OF VEHICLE, PART OF HOOD LATCH) HOT AT ALL TIMES HVAC IGN KEY RES SIG IGNITION SWITCH INSTRUMENT PANEL CLUSTER (IPC) LEFT REAR DOOR JAMB SWITCH LOGIC LOGIC SECURITY IND SUPPLY VOLTAGE LT BLU WIRE LT BLU/BLK WIRE LT GRN/BLK WIRE OFF OFF/RUN/CRANK ORG/ WIRE ORG/BLK WIRE PASSENGER DOOR JAMB SWITCH POWER DISTRIBUTION SYSTEM PPL REAR COMPARTMENT LID RELEASE ACTUATOR (IN LATCH ASSEMBLY) RED WIRE RED/WHT WIRE RUN WIRE SECURITY IND SECURITY INDICATOR TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THEFT DETERRENT CONTROL MODULE (IN STEERING COLUMN, NEAR IGNITION SWITCH) WHT WIRE WHT/BLK WIRE

72 68 REAR DEFOG RLY CTRL REAR DEFOG SW SIG BLK WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) DEFOG SWITCH DEFOGGER INDICATOR HOT AT ALL TIMES HVAC CONTROL MODULE (CENTER OF DASH, BELOW RADIO) LOGIC LT BLU WIRE PPL REAR DEFOG FUSE REAR DEFOG RELAY REAR WINDOW DEFOGGER GRID UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, NEXT TO LEFT STRUT TOWER) WHT WIRE

A/C COM RLY CTRL ACC VOL ACC VOLT AIR CONDITIONING SYSTEM AIR PUMP RLY CTRL APP SENS 2 SIG IGNITION 1 VOL BATT POS VOL LOW REF BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) BRN WIRE BRN/WHT WIRE CLUTCH PEDAL POSITION (CPP) SENSOR (M/T) COMPT, NEXT TO LEFT STRUT TOWER) COMPUTER DATA LINES SYSTEM COOLING FAN RLY CTRL FUEL PMP RLY CTRL COOLING FANS SYSTEM CPP SENS SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM/ TCM FUSE 25 ECM/ TRANS FUSE FUEL TANK PRESSURE (FTP) SENSOR (TOP OF FUEL TANK) GROUND GRY WIRE GRY/BLK WIRE HI SPD COOL FAN RLY HOT AT ALL TIMES HOT AT ALL TIMES IGNITION SWITCH IAT SENS SIG IGN 1 VOLTAGE LOGIC LOW REF LOW REF A/C REF SENS SIG LOW REF PRESS SENS SIG SERIAL BUS + SERIAL BUS - LT BLU WIRE LT GRN WIRE MAF SENS SIG MIL CTRL OFF ORG/BLK WIRE ORG/GRN WIRE PNK/BLK WIRE PNK/ORG WIRE POWERTRAIN RLY CTRL PPL PPL FUEL LEVEL SENS SIG PPL/WHT WIRE RED/WHT WIRE RELAY COIL CTRL RUN WIRE RUN/ CRANK RELAY STARTER CTRL STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (IN ENGINE VEHICLE SPEED SENSOR (VSS) (M/T) (TOP OF MANUAL TRANSMISSION) VENT SOL CTRL VSS HIGH SIG STOP LAMP SW SIG VSS LOW SIG WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK GRN/WHT WIRE FUEL LEVEL SENSOR FUEL PUMP FUSE FUEL PUMP MOTOR FUEL PUMP RELAY FUEL PUMP, SENDER ASSEMBLY (INSIDE FUEL TANK) GRY WIRE HOT AT ALL TIMES IC 1 CTRL IC 2 CTRL IGN 1 VOL IGNITION COIL/ MODULE 1 (TOP OF ENGINE, UNDER COVER AT CYLINDER 1) IGNITION COIL/ MODULE 2 (TOP OF ENGINE, UNDER COVER AT CYLINDER 2) LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MAF IAT ORG/BLK WIRE ORG/WHT WIRE PNK WIRE PNK/BLK WIRE PNK/ORG WIRE PPL STRUT TOWER) TAN WIRE UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, NEXT TO LEFT WHT WIRE YEL WIRE

A/C COM RLY CTRL ACC VOL ACC VOLT AIR CONDITIONING SYSTEM APP SENS 2 SIG IGNITION 1 VOL BATT POS VOL LOW REF BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) BRN WIRE BRN/WHT WIRE CLUTCH PEDAL POSITION (CPP) SENSOR (M/T) COMPT, NEXT TO LEFT STRUT TOWER) COMPUTER DATA LINES SYSTEM COOLING FAN RLY CTRL FUEL PMP RLY CTRL COOLING FANS SYSTEM CPP SENS SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM/ TCM FUSE 25 ECM/ TRANS FUSE FUEL TANK PRESSURE (FTP) SENSOR (TOP OF FUEL TANK) GROUND GRY WIRE GRY/BLK WIRE HI SPD COOL FAN RLY HOT AT ALL TIMES HOT AT ALL TIMES IGNITION SWITCH IAT SENS SIG IGN 1 VOLTAGE LOGIC LOW REF LOW REF A/C REF SENS SIG LOW REF PRESS SENS SIG SERIAL BUS + SERIAL BUS - LT BLU WIRE LT GRN WIRE MAF SENS SIG MIL CTRL OFF ORG/BLK WIRE ORG/GRN WIRE PNK/BLK WIRE PNK/ORG WIRE POWERTRAIN RLY CTRL PPL PPL FUEL LEVEL SENS SIG PPL/WHT WIRE RED/WHT WIRE RELAY COIL CTRL RUN WIRE RUN/ CRANK RELAY STARTER CTRL STARTING/CHARGING SYSTEM STOP LAMP SW SIG TAN WIRE TAN/BLK WIRE TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (IN ENGINE VENT SOL CTRL WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BLK/WHT WIRE BRN WIRE DK GRN WIRE DK GRN/WHT WIRE FUEL LEVEL SENSOR FUEL PUMP FUSE FUEL PUMP MOTOR FUEL PUMP RELAY FUEL PUMP, SENDER ASSEMBLY (INSIDE FUEL TANK) GRY WIRE HOT AT ALL TIMES IAT IGNITION COIL/MODULE 1 (TOP OF ENGINE, UNDER COVER AT CYLINDER 1) IGNITION COIL/MODULE 2 (TOP OF ENGINE, UNDER COVER AT CYLINDER 2) LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MAF NCA WIRE ORG/BLK WIRE ORG/WHT WIRE PNK WIRE PNK/BLK WIRE PNK/ORG WIRE PPL SPARK PLUG TAN WIRE UNDERHOOD FUSE BLOCK YEL WIRE YEL/BLK WIRE