Chevrolet Astro I (1985-2005) tan/wht Wiring diagrams

1 2 GND TCC PWM 1 8 17 18 19 20 24 27 32 33 34 40 53 57 58 59 60 67 72 74 75 GND 1-2 SHIFT SOLENOID 2-3 SHIFT SOLENOID 3-2 SHIFT SOLENOID 79 80 3-2 SS SENS GND A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH ANTI-LOCK BRAKES SYSTEM AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (ABOVE RADIO) BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE CONVENIENCE CENTER CRUISE CONTROL SYSTEM (ENGINE HARN, NEAR BREAKOUT TO UNDERHOOD FUSE BLOCK) DK BLU WIRE DK GRN WIRE ECM-B FUSE ELECTRONIC BRAKE CONTROL MODULE ENGINE COOLANT TEMPERATURE SENSOR (LEFT SIDE OF LEFT CYL HEAD) FLUID TEMP SENSOR FUEL PUMP RELAY GRY WIRE HOT AT ALL TIMES HOT IN HOT IN RUN, START I/P FUSE BLOCK (BEHIND LEFT SIDE OF DASH) IGNITION COIL, IGNITION CONTROL MODULE, FUEL INJECTORS PNK WIRE INSTRUMENT PANEL CLUSTER (IPC) LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (LEFT CENTER OF TRANSMISSION) PC SOL HI PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (LEFT SIDE OF FIREWALL) PPL PPL DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) PPL PPL PPL/WHT WIRE PRESS CTRL SOLENOID RADIO RADIO FUSE 19 RED WIRE RED/BLK WIRE REV, LO RUN WIRE SPLICE PACK STOPLAMP SWITCH (ABOVE BRAKE PEDAL) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC PWM SOLENOID TCC SOLENOID THROTTLE POSITION SENSOR (LEFT SIDE OF THROTTLE BODY) TRANS FUSE 20 UNDERHOOD FUSE BLOCK (LEFT SIDE OF FIREWALL) ECM I FUSE VEHICLE SPEED SENSOR (REAR OF TRANSMISSION) WHT WIRE YEL WIRE YEL/BLK WIRE

AMBIENT LIGHT SENSOR (ON TOP LEFT CENTER OF DASH) ANTI-THEFT SYSTEM ANTI-THEFT SYSTEM REMOTE KEYLESS ENTRY CIRCUIT BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (ABOVE RADIO) BRN WIRE COURTESY LAMP ON SIG HEADLAMP SW FLASH-TO-PASS CRUISE FUSE 6 DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM DRIVER DOOR JAMB SWITCH SIG DRL RELAY CTRL CLASS 2 SERIAL DATA GROUND IGNITION 1 VOLTAGE EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM GMCM SERIAL DATA GROUND BATTERY POSITIVE VOLTAGE DOOR UNLOCK CTRL DOOR LOCK CTRL GRY WIRE GRY/BLK WIRE GUAGES FUSE 4 HEADLAMP OFF SIG HEADLAMP RELAY COIL SUP VOLT LED DIMMING SIGNAL VEHICLE SPEED SENSOR SIG HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM COMPUTER DATA LINES SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM INTERIOR LIGHTS SYSTEM INSTRUMENT CLUSTER SYSTEM HIGH BEAM SIG PARK LAMPS SUPPLY VOLTAGE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK I/P LAMP SULLPY VOLTAGE AMBIENT LIGHT SENSOR SIG IGNITION SWITCH INTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM LEFT TURN SIGNAL LMP SUP VOLT RIGHT TURN SIGNAL LMP SUP VOLT LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PARK BRAKE SWITCH (ON PARKING BRAKE ASSEMBLY) PASS DOOR JAMB SWITCH SIG PNK WIRE POWER DISTRIBUTION SYSTEM (RAP) INTERIOR LIGHTS SYSTEM HORNS SYSTEM PPL INTERIOR LAMP DEFEAT SW SIG PPL/WHT WIRE RAP RELAY COIL CTRL COURTESY LAMP RELAY CTRL HORN RELAY CTRL RED/WHT WIRE RUN WIRE SECURITY SYSTEM SENSOR SIG TAN/WHT WIRE TBC FUSE 15 WARNING SYTEMS TRANSMISSION SYSTEM WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH A/C LOW PRESSURE SWITCH A/C RELAY A/T SHIFT LOCK CONTROL SOLENOID AMBIENT AIR TEMPERATURE SENSOR BLK WIRE BLK/WHT WIRE BLOWER MOTOR SWITCH- A/C AUXILIARY BLOWER MOTOR SWITCH- HEATER AUXILIARY DRIVER SEAT ADJUSTER SWITCH BODY CONTROL MODULE (BCM) CENTER HIGH MOUNTED STOP LAMP (CHMSL) RESISTOR STEERING COLUMN GROUND- MOLDED CONVENIENCE CENTER COOLANT BYPASS VALVE SOLENOID DATA LINK CONNECTOR (DLC) DIODE 1 DRIVER INFORMATION CENTER (DIC) FUEL PUMP RELAY HALF OF STEERING COLUMN) HEADLAMP, PANEL DIMMER SWITCH IGNITION CONTROL MODULE (ICM) MASS AIR FLOW (MAF) SENSOR IGNITION KEY ALARM SWITCH IGNITION SWITCH INSTRUMENT PANEL CLUSTER (IPC) INSTRUMENT PANEL CLUSTER (IPC) CRUISE CONTROL MODULE (CCM) NCA WIRE OF STEERING COLUMN) OUTSIDE REARVIEW MIRROR SWITCH PARK/NEUTRAL POSITION (PNP) SWITCH POWERTRAIN CONTROL MODULE (PCM) REAR SEAT AUDIO (RSA) CONTROLLER (IF EQUIPPED) RELAY BLOCK 1 RELAY BLOCK 2 STARTER ENABLE RELAY TAN/WHT WIRE TOW/ HAUL SWITCH TRANSFER CASE SHIFT CONTROL MODULE TURN SIGNAL/ HAZARD FLASHER MODULE UNDERHOOD FUSE BLOCK UPFITTER ACCY RELAY VANITY MIRROR LAMP (LEFT) VANITY MIRROR LAMP (RIGHT) WHT WIRE WINDOW MASTER SWITCH- DRIVER DOOR LOCK SWITCH- DRIVER WINDSHIELD WIPER MOTOR MODULE

AMBIENT LIGHT SENSOR (TOP CENTER OF DASH) BLK WIRE BODY CONTROL MODULE (BCM) (ABOVE RADIO) COMPOSITE HEADLAMPS DAYTIME RUNNING LAMPS DIODE (ON LOWER PART OF LEFT "B" PILLAR) DAYTIME RUNNING LAMPS RELAY DK BLU WIRE DRL RELAY CRTL FLASH TO PASS GAUGES FUSE 4 GRY WIRE HEAD HEADLAMP RELAY HEADLAMP, PANEL DIMMER SWITCH HEADLP ENABLE HI BEAM SIG HEADLP REQ FLASH TO PASS HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK (BEHIND LEFT SIDE OF DASH) LEFT HEADLAMP LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LIGHTING FUSE LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MULTIFUNCTION TURN SIGNAL LEVER OFF ON LO ORG/ WIRE PARK AUTO PARK AUTO HEAD PHOTO CELL PNK WIRE PPL PPL/WHT WIRE RED WIRE RELAY BLOCK 2 (BEHIND LEFT SIDE OF DASH) RH HDLP FUSE RIGHT HEADLAMP RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP SEALED BEAM HEADLAMPS TAN WIRE TAN/WHT WIRE TBC FUSE 15 UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF FIREWALL) WHT WIRE YEL WIRE

ABS SYSTEM AIR BAG IND BLK WIRE BLK/WHT WIRE BRAKE IND BRN WIRE BRN/WHT WIRE CHARGE IND CHECK GAUGES IND CHECK OIL IND COMPUTER DATA LINES SYSTEM COOLANT TEMP GAUGE CRUISE FUSE 6 DK BLU WIRE DK GRN/WHT WIRE DOOR AJAR IND ENGINE CONTROLS SYSTEM ENGINE OIL PRESSURE SENSOR (ON TOP REAR OF ENGINE) FUEL GAUGE GAUGES FUSE 4 GRY WIRE HIGH BEAM IND HOT AT ALL TIMES HOT IN ON HOT IN ON OR START HOT W/ HEADLAMP SW IN PARK OR HEAD I/P FUSE BLOCK (BEHIND LEFT SIDE OF DASH) I/P ILLUM VOLT IGN 1 ILLUM FUSE 14 ILLUMINATION (6 BULBS) ING 3 INSTRUMENT CLUSTER LEFT TURN IND LOW FUEL IND LT BLU WIRE MIL CONTROL ODOMETER OIL GAUGE OIL PRESS ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (BELOW FUSE BLOCK, ON LEFT SIDE OF FIREWALL) RADIO BATT FUSE 19 RIGHT TURN IND SEAT BELT IND SECURITY IND SERVICE ENGINE SOON IND SPARE SPEEDOMETER GAUGE TAN/WHT WIRE TOW/HAUL IND TRANS FUSE 20 TRIP RESET VOLTS GAUGE VSS SERIAL DATA OFF/ RUN/

BLK WIRE BLK/WHT WIRE BLOCK BLU WIRE BODY CONTROL MODULE (BCM) (ABOVE RADIO) BRAKE PRESSURE DIFFERENTIAL SWITCH (ON BRAKE PRESSURE MODULATOR VALVE ASSY) BRN WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DR DOOR AJAR SW DRIVER DOOR JAMB SWITCH EXTERIOR LIGHTS GRY WIRE HEAD HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES I/P FUSE IGNITION KEY ALARM SWITCH (CLOSED W/KEY IN IGNITION) IGNITION SWITCH INSTRUMENT PANEL CLUSTER (IPC) KEY-IN IGNITION SW LEFT SEAT BELT SW LEFT TURN SIGNAL LT BLU WIRE LT GRN WIRE MULTI- FUNCTION NCA WIRE OFF ORG/ WIRE PARK PARK BRAKE PARK BRAKE SW SIG PARK LAMP VOLT PK LPS FUSE 9 RIGHT TURN SIGNAL SEAT BELT BUCKLE SWITCH (ON DRIVER'S SEAT BELT BUCKLE) SERIAL DATA SERIAL DATA SWITCH SIGNAL PPL SWITCH (BASE OF PARK BRAKE LEVER) TAN/WHT WIRE TURN SIGNAL LEVER VEHICLE SPEED SIG VSS SIGNAL WHT WIRE

12 13 14 PPL 3-2 SS ECT LOW REF BATTERY CLS 2 DATA CLS 2 DATA TPS LOW REF CMP LOW REF BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (ABOVE RADIO) BRN/WHT WIRE CENTRAL SEQUENTIAL FUEL INJECTION CKP SIG CRANKSHAFT POSITION SENSOR (BEHIND AND TO THE RIGHT OF PULLEY) DK BLU WIRE DK GRN WIRE ECM I FUSE ECM-B FUSE ENGINE COOLANT TEMPERATURE SENSOR (ON LEFT SIDE OF LEFT CYLINDER HEAD) GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN, START I/P FUSE BLOCK INJECTOR 1 INJECTOR 3 INJECTOR 4 INJECTOR 5 KNOCK SENSOR (LEFT REAR OF DISTRIBUTOR) KS RETURN KS SIG LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK IGNITION INJECTOR 2 INJECTOR 6 WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (ON LEFT SIDE OF FIREWALL) PPL PPL/WHT WIRE PRND A BRAKE SW PRND P PPL PRND B CMP SIG RANGE B RANGE C IGNITION BATTERY CKP LOW REF RED WIRE SENS LOW REF GROUND TAN WIRE TAN/WHT WIRE TFT LOW REF MAP LOW REF TRANS FUSE 20 UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE

12 13 14 PPL BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION SENSOR (ON SIDE OF DISTRIBUTOR) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FUEL PUMP RELAY GRY WIRE GRY/BLK WIRE HEATED OXYGEN SENSOR (BANK 1 SENSOR 1) (LEFT FRONT EXHAUST Y-PIPE) HEATED OXYGEN SENSOR (BANK 1 SENSOR 2) (ON EXHAUST, BETWEEN MUFFLER, CONVERTER) HEATED OXYGEN SENSOR (BANK 2 SENSOR 1) (RIGHT FRONT EXHAUST Y-PIPE) HOT IN RUN, START LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PARK/ NEUTRAL POSITION SWITCH (LEFT CENTER OF TRANS) PNK 2 3 WIRE PNK 4 5 WIRE PNK PNK 16 17 WIRE PNK WIRE PNK/BLK WIRE PPL PPL 7 8 9 PPL/WHT WIRE RED WIRE TAN WIRE TAN/WHT WIRE THROTTLE POSITION SENSOR (LEFT SIDE OF THROTTLE BODY) UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK ENG-1 FUSE WHT WIRE YEL WIRE

19 20 21 PNK WIRE A/C REQ A/C SYSTEM ABS SYSTEM (SPEED SIGNAL) BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COIL DRIVER COIL WIRE CRUISE CONTROL SYSTEM CRUISE CONTROL SYSTEM (SPEED SIGNAL) CRUISE ENG DISTRIBUTOR DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE EVAP PURGE EVAP VENT MIL CTRL 2-3 SS 1-2 SS VSS OUT VSS OUT TFT SENS SIG FUEL LEV CYC SW IN GEN F DUTY SIG IAC COIL B HI IAC COIL B LO IAC COIL A LO IAC COIL A HI GEN L GROUND GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK IAT LOW REF IDLE AIR CONTROL VALVE (LEFT REAR OF THROTTLE BODY) IGN IGNITION COIL IGNITION CONTROL MODULE (TOP OF ENGINE) FRONT OF COIL) INSTRUMENT PANEL CLUSTER INTAKE AIR TEMPERATURE SENSOR (TOP OF AIR INTAKE DUCT) LOGIC LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAF SENS SIG MAP SIG MALFUNCTION INDICATOR LAMP ORG/ WIRE PC SOL HI PC SOL LO FUEL PMP PNK WIRE POWERTRAIN CONTROL MODULE (LEFT SIDE OF FIREWALL) PPL/WHT WIRE PRND C TRANS RNG A FTP SENS SIG PNK WIRE RADIO BATT FUSE 19 RED WIRE RED/BLK WIRE STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC SOL A/C CLU TIMING TP SIG IAT SIG IC TIMING CTRL VEHICLE SPEED SENSOR (REAR OF TRANSMISSION) VSS LOW VSS HIGH WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE