Chevrolet Cobalt I (2004-2010) tan/blk Wiring diagrams

2 20 SERIAL DATA + SERIAL DATA - 5 49 43 44 RLY CTRL RLY CTRL SERIAL DATA SERIAL DATA 58 4 ECT SIG LOW REF BLK WIRE BLU WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) COMPUTER DATA LINES SYSTEM COOLING FAN 1 FUSE COOLING FAN 1 RELAY COOLING FAN 2 FUSE COOLING FAN 2 RELAY COOLNT SW DK BLU WIRE DK GRN WIRE DK LT 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 LT GRN WIRE TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, NEXT TO LEFT STRUT TOWER) YEL WIRE

2 20 SERIAL DATA + SERIAL DATA - 5 43 44 49 RLY CTRL SERIAL DATA SERIAL DATA RLY CTRL 58 4 ECT SIG LOW REF BLK WIRE BLU WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) COMPUTER DATA LINES SYSTEM COOLING FAN 1 FUSE COOLING FAN 1 RELAY COOLING FAN 2 FUSE COOLING FAN 2 RELAY COOLNT SW DK BLU WIRE DK GRN WIRE ENGINE COOLANT TEMPERATURE ENGINE COOLING FAN (FRONT OF ENGINE COMPT, ATTACHED TO RADIATOR) ENGINE COOLING FAN RESISTOR (LOWER LEFT RADIATOR SHROUD) GRN WIRE GRY WIRE HOT AT ALL TIMES LT BLU WIRE LT GRN WIRE TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, NEXT TO LEFT STRUT TOWER) 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

A/T SHIFT LK CTRL SOL SPLY VOL AMBIENT AIR TEMP SENS SIG DRL RELAY CONTROL AMBIENT AIR TEMPERATURE SENSOR (RIGHT SIDE OF LEFT HEADLIGHT) BATT POS VOL BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) BRAKE FLUID LEVEL SWITCH (IN REAR OF ENGINE COMPT, ATTACHED TO MASTER CYLINDER) BRN WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR LOCK LOCK/UNLOCK SIG DOOR LOCK LOCK/UNLOCK SIG PARK LAMP RLY CTRL DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM COMPUTER DATA LINES SYSTEM FOG LMP RLY CTRL REAR COMPT LID AJAR SW SIG GND LOW REF GRY WIRE GRY/BLK WIRE HEADLAMP HIGH BEAM RLY CTRL HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM HOOD CLOSED SWITCH SIGNAL HOOD AJAR SWITCH SIGNAL HORN RLY CTRL GND BAT POS VOLTAGE HORNS SYSTEM HOT AT ALL TIMES INT LIGHT FUSE 27 LEFT FRONT TURN SIG LAMP SPLY VOL LOW SPD GMLAN SERIAL DATA LF DOOR AJAR SW SIG LOGIC LOW REF LOW REF CURRENT SENSOR SIG LR DOOR AJAR SW ISG LT BLU WIRE LT BLU/BLK WIRE LT GRN/BLK WIRE ORG/BLK WIRE PARK BRAKE SWITCH (IN CENTER CONSOLE, ATTACHED TO PARKING BRAKE) PNK WIRE PPL RED/WHT WIRE SEDAN SHIFT INTERLOCK SYSTEM STARTING/CHARGING SYSTEM STARTING/CHARGING SYSTEM DOOR LOCKS SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRUNK RELEASE RLY CTRL TRUNK, TAILGATE, FUEL DOORS SYSTEM WHT WIRE WINDSHIELD WIPER MTR PRK SW SIG WINDSHIELD WIPER SW ON SIG WIPER/WASHER SYSTEM YEL WIRE YEL/BLK WIRE

BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM POWER DISTRIBUTION SYSTEM CRUISE CTRL SW SIG IGNITION KEY RESISTOR SIGNAL DEFOGGER SYSTEM AIR CONDITIONING SYSTEM DK GRN WIRE DK GRN/WHT WIRE DRL AMBIENT LIGHT SENS LOW REF DRL AMBIENT LIGHT SENS SIG EXTERIOR LIGHTS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM ANTI-THEFT SYSTEM FLASH TO PASS SIG FOG LMP RLY CTRL GRY WIRE HAZARD SWITCH SIG REAR COMPT LID RELEASE SW SECURITY IND SPLY VOLTAGE HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HIGH SPEED GMLAN SER DATA BUS - HIGH SPEED GMLAN SER DATA BUS - HORNS SYSTEM I/P LAMP DIMMER SW SIG LOGIC LOW SPEED GMLAN SERIAL DATA LOW SPEED GMLAN SERIAL DATA LR TURN SIG SW SIG RR TURN SIG SW SIG REAR DEFOG SW SIG A/C REQUEST SIG LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PASSENGER SEATBELT REMINDER REAR DEFOG RLY CTRL POWER DISTRIBUTION SYSTEM WIPER/WASHER SYSTEM INTERIOR LIGHTS SYSTEM PPL PPL/WHT WIRE SUPPLEMENTAL RESTRAINTS SYSTEM DEFOGGER SYSTEM TAN WIRE TAN/BLK WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

2.4L/2.2L W/ A/T 2.4L/2.2L W/ M/T BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (DLC) (LOWER LEFT OF DASH, NEAR HOOD RELEASE) DIGITAL RADIO RECEIVER (CENTER REAR SHELF, UNDER TRIM PAD) DK GRN WIRE DLC FUSE ENGINE CONTROL MODULE (ECM) (2.2L/2.4L) (LEFT SIDE OF ENGINE COMPT, IN FRONT OF HIGH HIGH SPEED HIGH SPEED GMLAN SERIAL DATA BUS + HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER (IPC) LOW SPEED GM LAN SERIAL DATA LOW SPEED GMLAN SERIAL DATA RADIO RED/WHT WIRE SERIAL DATA BUS + HIGH SPEED GMLAN TAN WIRE TAN/BLK WIRE THEFT DETERRENT CONTROL MODULE (IN STEERING COLUMN, NEAR IGNITION SWITCH) UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, NEXT TO LEFT STRUT TOWER) W/ ACTIVE BRAKE W/ ONSTAR W/ ONSTAR W/ VSC W/O ACTIVE BRAKE W/O ONSTAR W/O VSC

ACC VOLTS ACCELERATOR PEDAL POSITION (APP) SENSOR (NEAR ACCELERATOR PEDAL BRACKET) AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL ON IND DATA BUS - DK BLU WIRE DK GRN WIRE EPS/ STR WHL CRUISE CNTRL CTRL FUSE 19 SW SIG VOLTS GRY WIRE HOT W/ RUN/CRANK RELAY ENERGIZED LEFT STEERING WHEEL CONTROL SWITCH LOGIC LT BLU WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL VSS LOW SIG RES+ SET- TAN WIRE TAN/BLK WIRE THROTTLE ACTUATOR CONTROL (TAC) MODULE (TOP OF INTAKE MANIFOLD) VEHICLE SPEED SENSOR (VSS) VSS HIGH SIG WHT WIRE WHT/BLK WIRE YEL WIRE

67 18 21 41 5 VOLT REF APP SENS 2 SIG LOW REF LOW REF APP SENS 1 SIG 5 VOLT REF ACCELERATOR PEDAL POSITION (APP) SENSOR (NEAR ACCELERATOR PEDAL BRACKET) BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (UNDER CENTER DASH, ON RIGHT SIDE OF CENTER CONSOLE) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CPP SIG SENS CPP SW SIG CRUISE CONTROL ON IND DATA BUS - DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE EPS/ STR WHL CRUISE CNTRL CTRL FUSE 19 SW SIG IGN GRY WIRE HOT W/ RUN/CRANK RELAY ENERGIZED IGN LEFT STEERING WHEEL CONTROL SWITCH LOGIC LOW REF LT BLU WIRE LT GRN WIRE ORG/GRN WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL/WHT WIRE RES+ SET- TAN WIRE TAN/BLK WIRE THROTTLE ACTUATOR CONTROL (TAC) MODULE (TOP OF INTAKE MANIFOLD) TRANSMISSION VEHICLE SPEED SENSOR (VSS) (TOP OF MANUAL VSS HIGH SIG VSS LOW SIG WHT WIRE WHT/BLK WIRE YEL 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 CAMSHAFT POSITION (CMP) SENSOR CKP SENS SIG CMP SENS SIG CRANKSHAFT POSITION (CKP) SENSOR (LOWER LEFT REAR OF ENGINE) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (REAR OF ENGINE, NEAR EXHAUST MANIFOLD) ENGINE OIL PRESSURE (EOP) SWITCH (LOWER LEFT REAR OF ENGINE) GRY WIRE GRY/WHT WIRE IC 2 CTRL IC 3 CTRL IC 4 CTRL IGN 1 VOL IGNITION COIL/ MODULE 3 (TOP OF ENGINE, UNDER COVER AT CYLINDER 3) IGNITION COIL/ MODULE 4 (TOP OF ENGINE, UNDER COVER AT CYLINDER 4) KNOCK SENSOR (KS) (LOWER LEFT SIDE OF ENGINE) LOW REF LOW REF LOC CONT SIG 1 LOW SENS 2 OIL PRES SW SIG LOW SIG SENS 2 LOW SIG SENS 1 LOW REF KS SIG KS SIG LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK/BLK WIRE PPL PPL IC 1 CTRL IC 3 CTRL IC 4 CTRL PPL/WHT WIRE PURG SOL CTRL GEN TRN ON SIG TAC MTR CTRL 2 STARTING/CHARGING SYSTEM TAC MTR CTRL 1 TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TP SENS 1 SIG ECT SENS SIG TP SENS 2 SIG TRANSMISSION CASE) WHT WIRE YEL WIRE