Saturn ION I (2003-2007) low ref Wiring diagrams

BLK WIRE COOLING FAN 1 (ATTACHED TO LEFT SIDE OF RADIATOR) COOLING FAN 1 FUSE 45 COOLING FAN 1 RELAY 30 COOLING FAN 2 (ATTACHED TO RIGHT SIDE OF RADIATOR) COOLING FAN 2 FUSE 44 COOLING FAN RELAY CONTROL COOLING FAN S/P RELAY CTRL DK BLU WIRE DK GRN WIRE ECT SENSOR SIG GRY WIRE HOT AT ALL TIMES LOW REF LT BLU WIRE RED WIRE UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE

2.0L 2.2L 59 49 28 56 26 17 LOW REF A/C PRESS 6 15 A/C RELAY PPL CLASS 2 DATA A/C CLUTCH RELAY A/C COMPRESSOR CLUTCH (AT LOWER LEFT FRONT OF ENGINE) A/C DIODE 35 A/C FUSE 5 A/C ON LED A/C REFRIGERANT PRESSURE SENSOR (ON LOWER LEFT SIDE OF ENGINE, BELOW GENERATOR) A/C REQUEST A/C SWITCH BLK WIRE BODY CONTROL MODULE (BCM) (AT LOWER CENTER OF DASH) BRN WIRE CLASS 2 DATA DK GRN WIRE DK GRN/WHT WIRE ECT SENS ENGINE CONTROL MODULE (ECM) (2.2L) (AT LEFT SIDE OF ENGINE COMPT) GRY WIRE HI OFF HVAC FAN SWITCH HOT AT ALL TIMES HOT IN RUN OR START HVAC CONTROL ASSEMBLY HVAC FUSE LI RUN/ CRANK RELAY 28 LOGIC LOGIC A/C ON/OFF IGN 3 VOLT A/C REQUEST LOW REF LT GRN WIRE PPL RED WIRE RED/BLK WIRE RELAY RUN RELAY CTRL RUN WIRE UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE

ACC VOLT AMBIENT AIR TEMP SENS SIG AMBIENT AIR TEMPERATURE SENSOR (AT LEFT FRONT OF VEHICLE, BEHIND GRILL) AMBIENT LIGHT SENSOR AUTOMATIC DAY-NIGHT MIRROR ELEMENT AUTOMATIC DAY/ NIGHT MIRROR LOW REF AUTOMATIC DAY/ NIGHT MIRROR SIG BACKUP LAMPS SUPPLY VOLT BLK WIRE BODY CONTROL MODULE (BCM) (AT LOWER CENTER OF DASH) BRN/WHT WIRE CELLULAR DK GRN/WHT WIRE GROUND GRY WIRE GRY/BLK WIRE HEADLIGHT SENSOR HOT AT ACC OR RUN INSIDE REARVIEW MIRROR KEYPAD KEYPAD GREEN LED KEYPAD SIGNAL KEYPAD SUPPLY LOGIC LOW REF LT GRN WIRE LT GRN/BLK WIRE NCA WIRE POWER TOPS SYSTEM RED LED WIRE SUNROOF FUSE YEL WIRE YEL/BLK WIRE

ALC/ PARK RELAY AUTOMATIC HEAD LAMPS ON-OFF CONTROL AUTOMATIC TRANSMISSION SHIFT INDICATOR LAMP (A/T) B(+) BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (AT LOWER BRN WIRE DASH FUSE FOG LAMP SWITCH (DELUXE FOG LAMPS) GRY WIRE HAZARD SWITCH HEADLAMP SWITCH HOT AT ALL TIMES HVAC CONTROL ASSEMBLY ILLUMINATION INST PANEL LAMPS DIM CTRL INST PANEL LAMPS POWER INSTRUMENT PANEL CLUSTER (IPC) INSTRUMENT PANEL DIMMER SWITCH LOGIC (CENTER OF DASH) LOGIC GND LOW REF OFF HEAD ORG/ WIRE PARK AUTO TURN SIGNAL/ MULTIFUNCTION SWITCH PARK FUSE PARK LAMP PWR PARK LAMP RLY CTRL PPL RADIO TRACTION CONTROL SWITCH (W/ TRACTION CONTROL POWERTRAIN MANAGEMENT) WHT WIRE

31 16 A/C RELAY 459 1807 PPL CLASS 2 DATA 47 59 49 28 50 335 2751 380 2700 410 COOL FAN REL LOW REF A/C PRESS A/C CLUTCH RELAY 24 A/C COMPRESSOR CLUTCH (AT LOWER LEFT FRONT OF ENGINE) A/C DIODE 35 A/C FUSE 5 A/C IND A/C REFRIGERANT PRESSURE SENSOR (ON LOWER LEFT SIDE OF ENGINE, BELOW GENERATOR) A/C REQUEST A/C SWITCH BLEND BI-LVL HTR BLEND BI-LVL HTR RECIRC SWITCH BLK WIRE BLOWER MOTOR (BEHIND LOWER RIGHT SIDE OF DASH, BEHIND GLOVE COMPT) BODY CONTROL MODULE (BCM) (AT LOWER CENTER OF DASH) BRN WIRE CLASS 2 DATA COOLING FAN (AT FRONT OF ENGINE COMPT, ATTACHED TO RADIATOR) COOLING FAN FUSE 45 COOLING FAN RELAY 30 DEF VENT DK GRN WIRE DK GRN/WHT WIRE ECT SENS ENGINE CONTROL MODULE (ECM) (AT LEFT SIDE OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (2.2L: ON RIGHT REAR GRY WIRE HI OFF HOT AT ALL TIMES HOT IN RUN OR START HVAC CONTROL ASSEMBLY HVAC FAN SWITCH HI HVAC FUSE ILLUM LOGIC LOW REF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MODE SWITCH OFF ORG/ WIRE PNK/WHT WIRE PPL RED WIRE RED/BLK WIRE RELAY RUN RELAY CTRL RUN WIRE RUN/ CRANK RELAY 28 TAN WIRE UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE

A/C REFRIGERANT PRESSURE SENSOR (LOWER LEFT SIDE OF ENGINE, BELOW GENERATOR) ACC VOLT ACCY AIR CONDITIONING SYSTEM BATTERY BLK WIRE BODY CONTROL MODULE (BCM) BRN WIRE BRN/WHT WIRE CLASS 2 CLASS 2 DATA CLU RLY CTRL LOW REF LOW REF CLUTCH PEDAL POSITION (CPP) SWITCH (BELOW LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM CPP SW SIG PNP CLU ST SW CRUISE CONTROL SYSTEM CRUISE SIG DATA DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM FUSE 1 ECM FUSE 13 EVAP SOL CTRL EVAPORATIVE EMISSION CANISTER VENT SOLENOID F PMP RLY CTRL MAIN RLY CTRL FAN RLY CTRL FUEL PRES SIG FUEL TANK PRESSURE (FTP) SENSOR (INSIDE FUEL TANK) GRY WIRE GRY/RED WIRE HI RLY CTRL HOT AT ALL TIMES HOT IN RUN OR START IGN SW FUSE 1 IGNITION SWITCH INSTRUMENT CLUSTER LOAD CTRL LOCK OFF LOGIC LOW REF LT BLU WIRE MALFUNC- TION INDICATOR LAMP MIL CTRL APP SENS 2 SIG ORG/ WIRE PNK 6 7 WIRE PNK RLY CTRL WIRE PNK WIRE PNK/BLK WIRE PNK/ORG WIRE PPL PPL 14 15 PPL PPL PPL PPL SERIAL DATA SERIAL DATA PPL SENS SIG PRI PPL TCC BRK SW RED/BLK WIRE RED/PNK WIRE REFRIG PRES SIG APP SENS 1 SIG RLY COIL CTRL RUN WIRE RUN/ CRANK RELAY 28 RUN/CRANK FUSE 38 STARTING/CHARGING SYSTEM STOP LP SIG TAN WIRE UNDERHOOD FUSE BLOCK (LEFT REAR SIDE OF ENGINE COMPT) VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

BARO SIG BCM FUSE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (AT LOWER CENTER OF DASH) BRN/WHT WIRE CLUTCH/ BRAKE FUSE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE OIL PRESSURE (EOP) SWITCH (LOWER REAR OF ENGINE, ABOVE STARTER) EVAP SOL FUEL PUMP FUEL PUMP FUSE FUEL PUMP RELAY FUEL PUMP, SENDER ASSEMBLY (INSIDE FUEL TANK) FUEL SENDER GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ACC OR RUN IAT LOW REF LOWER STOP LAMP SWITCH (BELOW LEFT SIDE OF DASH, ON BRAKE PEDAL BRACKET) LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN/BLK WIRE MAF NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/ PPL/ PPL/ PNK WIRE PNK/BLK WIRE PNK/ORG WIRE PPL PPL 18 19 20 21 STOP FUSE SW SIG TAN WIRE TAN/BLK WIRE UPPER STOP LAMP SWITCH (BELOW LEFT SIDE OF DASH, ON BRAKE PEDAL BRACKET) VEHICLE SPEED SENSOR (AT REAR OF ENGINE, ON TRANSAXLE) VSS HI VSS LOW WHT/BLK WIRE YEL WIRE YEL/WHT WIRE

BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CMP SIG CRANKSHAFT POSITION (CKP) SENSOR (LOWER REAR OF ENGINE, BELOW OIL FILTER) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECT SIG LOW REF MAP SIG SCIP SIG LOW REF IC 1 SIG MAF SIG GEN SIG GRY WIRE IAT SENS SIG LOW REF INJ 2 CTRL INJ 4 CTRL INJ 3 CTRL IC 3 SIG IC 2 SIG INJ 1 CTRL KNOCK SENSOR (LOWER LEFT SIDE OF ENGINE, BELOW THROTTLE BODY) LOW REF LOW REF LOW REF LOW REF TAC CTRL 2 TAC CTRL 1 LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/BLK WIRE PNK/BLK WIRE PPL PPL LOW REF CKP 1 SIG LOW REF PPL/WHT WIRE RED WIRE SOL CTRL LOW REF STARTING/ CHARGING SYSTEM STARTING/CHARGING SYSTEM SUPERCHARGER INLET PRESSURE (SCIP) SENSOR (TOP LEFT OF SUPERCHARGER) TAN WIRE TAN/WHT WIRE THROTTLE ACTUATOR CONTROL MODULE YEL WIRE

AIR FLOW SENSING BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CMP SENSOR SIG LOW REF KNOCK SENSOR SIG GROUND COOLING FANS SYSTEM CRANKSHAFT POSITION (CKP) SENSOR (LOWER REAR OF ENGINE, BELOW OIL FILTER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (AT LEFT SIDE OF ENGINE COMPARTMENT) EVAPORATIVE EMISSION (EVAP) CANISTER PURGE SOLENOID FUEL INJ 1 CTRL FUEL INJ 3 CTRL FUEL INJ 4 CTRL FUEL INJ 2 CTRL GRY WIRE IGN 1 VOL INTAKE AIR TEMPERATURE (IAT) SENSOR KNOCK SENSOR (KS) (LOWER LEFT SIDE OF ENGINE, BELOW THROTTLE BODY) LOW CTRL SENSOR VSS HIGH SIG VSS LOW SIG LOW REF LOW REFERENCE LOW REFERENCE HIGH SIG SENSOR LOW SIG SENSOR HIGH SIG SENSOR LOW SIG SENSOR PPL LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MAF/IAT SENSOR (ATTACHED TO AIR CLEANER OUTLET) NCA WIRE OF ENGINE) ORG/ WIRE ORG/BLK WIRE PNK/BLK WIRE PPL PPL TP SENSOR 2 SIG PPL/WHT WIRE PURGE SOL CTRL RED WIRE RED/BLK WIRE STARTING/CHARGING SYSTEM STARTING/CHARGING SYSTEM COMPUTER DATA LINES SYSTEM TAC MOTOR CTRL 1 TAC MOTOR CTRL 2 TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THROTTLE BODY (TOP LEFT SIDE TP SENSOR 1 SIG LOW REF WHT WIRE YEL WIRE