Chevrolet Tahoe I (1995-1999) hot in run or start Wiring diagrams

29 30 VSS VSS 5 15 4 MIL IND UPSHIFT IND SPEEDO ACCY AIR BAG DAYTIME RUNNING LAMPS ANTI-LOCK BRAKES ANTI-LOCK BRAKES SYSTEM BALANCE FUEL GAGE SENDER (IN REAR FUEL TANK) BLK WIRE BLK/WHT WIRE BRAKE IND IN BRAKE PRESSURE MODULATOR VALVE (LEFT FRONT WHEELHOUSE) BRAKE PRESSURE WARNING SWITCH (ON REAR OF BRAKE PRESSURE MODULATOR VALVE BODY) BRAKE/ BRN WIRE BRN/WHT WIRE BULB TEST CHECK GAUGES CHECK GAUGES LAMP DRIVER DAYTIME RUNNING LAMPS MODULE (LEFT SIDE OF I/P) DIODE 1 DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROLS SYSTEM (FUEL PUMP BALANCE RELAY) ENGINE COOLANT TEMPERATURE SENDER (LEFT CYLINDER HEAD) FUEL GAUGE FUEL PUMP BALANCE MODULE (NEAR TRANSMISSION CROSSMEMBER) FUEL PUMP, SENDER (IN FRONT FUEL TANK) FUEL PUMP, SENDER (IN FUEL TANK) FUEL PUMP/ OIL PRESSURE SWITCH, SENDER (LEFT REAR SIDE OF ENGINE) GRY WIRE HEADLIGHTS SYSTEM HI BEAM HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (BEHIND LEFT SIDE OF I/P) IGN IGN E MINI FUSE IGNITION COIL (RIGHT REAR SIDE OF ENGINE) IGNITION SWITCH ILLUM ILLUMINATION INSTRUMENT CLUSTER LED DIMMING LEFT TURN LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE M/T A/T PNK WIRE OIL GAUGE PARITY PRNDL PARK BRAKE WARNING SWITCH (LEFT SIDE OF I/P) PNK WIRE PPL PPL PPL PPL/WHT WIRE PRNDL PRNDL A PRNDL B PRNDL C RIGHT TURN RUN WIRE SAFETY BELT SERVICE ENGINE SOON STARTING/CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TACH TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TEMP GAUGE TRANS FUSE 20 GAUGES FUSE 4 TRANSMISSION RANGE SELECTOR (LEFT SIDE OF TRANSMISSION) TWISTED PAIR UNDERHOOD FUSE-RELAY CENTER UNDERHOOD FUSE-RELAY CENTER (LEFT REAR OF ENGINE COMPT) UPSHIFT (M/T ONLY) VEHICLE CONTROL MODULE (LEFT FRONT WHEELHOUSE) VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VOLTMETER SPEEDOMETER W/ DUAL FUEL TANKS W/O DUAL FUEL TANKS WARNING SYSTEMS WHT TAN/ WIRE WHT WIRE YEL WIRE

1-2 SHIFT SOL 1-2 SHIFT SOLENOID 2-3 SHIFT SOL 2-3 SHIFT SOLENOID 3-2 CTRL SOLENOID 3-2 DOWNSHIFT SOL AUTOMATIC TRANSMISSION BATTERY IN BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE FUSE 18 BRAKE SWITCH INPUT BRN WIRE BRN/WHT WIRE DASH FUSE BLOCK DATA CLASS II DK BLU WIRE ECM 1 FUSE ECM-B FUSE ECT SENS INPUT ELECTRONIC BRAKE CONTROL MODULE ENG 1 FUSE ENGINE COOLANT TEMP SENSOR (TOP RIGHT FRONT OF ENGINE) FRONT WHEEL LOCK FUEL PUMP, OIL PRESS SWITCH/ SENDER, FUEL PUMP RELAY GAUGES FUSE 4 GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN OFF, RUN OR START HOT IN RUN HOT IN RUN OR START IGNITION IN INSTRUMENT CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP MIL CONTROL ORG/ WIRE PCM GROUND PCS SOL HI OUT PCS SOL LO OUT PNK PNK WIRE PNK WIRE PPL PPL DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) PPL/WHT WIRE PRESS CTRL HI SOLENOID LO RANGE SIGNAL "A" RANGE SIGNAL "B" RANGE SIGNAL "C" RED WIRE RED/BLK WIRE SENSOR GROUND SENSOR RETURN STOPLAMP SWITCH (ON BRAKE PEDAL BRACKET) TAN WIRE TAN/BLK WIRE TCC PWM SOL TCC PWM SOLENOID TCC SOL TCC SOLENOID THROTTLE POSITION SENSOR (MOUNTED TO SIDE OF THROTTLE BODY) TP SENS INPUT TRANS FLUID TEMP SENSOR TRANS FUSE 20 TRANS RANGE PRESSURE SWITCH ASSEMBLY TRANS RANGE SWITCHES TRANS TEMP SIG IN TRANSFER CASE CIRCUIT PNK WIRE TRANSFER CASE, AXLE SWITCHES UNDERHOOD FUSE/RELAY CENTER VEHICLE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR VEHICLE SPEED SENSOR ADAPTOR VSS HI VSS LO WHT WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/RED WIRE BLU WIRE BRN WIRE DIESEL DIESEL ONLY FUSIBLE LINK (10 GA-RUST) GAS GAUGES FUSE 4 GENERATOR HOT IN RUN OR START I/P FUSE BLOCK INSTRUMENT CLUSTER PNK WIRE POWER DISTRIBUTION SYSTEM (DIESEL) POWER DISTRIBUTION SYSTEM (GASOLINE) RED WIRE RIGHT BATTERY LEFT BATTERY (DIESEL) STARTING CIRCUIT TACH CHARGE INDICATOR WHT WIRE

BLK WIRE BRN WIRE HOT IN RUN HOT IN RUN OR START HTR A/C FUSE 12 HVAC CONTROL MODULE I/P FUSE BLOCK ORG/ WIRE PICK-UP W/ EXTENDED OR CREW CAB PPL PPL PPL PPL/WHT WIRE REAR DEFOGGER SWITCH REAR WINDOW DEFOGGER GRID RIGHT CARGO DOOR CONTACTOR LEFT CARGO DOOR CONTACTOR RIGHT REAR CARGO DOOR DEFOGGER GRID LEFT REAR CARGO DOOR DEFOGGER GRID RR-DEFOG MINI FUSE SOLID STATE TIME DELAY RELAY SUBURBAN/UTILITY W/ LIFTGATE SUBURBAN/UTILITY W/O LIFTGATE UNDERHOOD FUSE/RELAY CENTER

BATTERY FEED EVO SOL OUTPUT BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC VARIABLE ORIFICE (EVO) SOLENOID (ON STEERING PUMP) EVO SOL FEED GAUGES FUSE 4 GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK LT BLU WIRE ORG/ WIRE ORG/BLK WIRE PNK PPL IGNITION SRL DATA CLASS 13 SENSOR RETURN 5 VOLT REF WIRE PNK WIRE POS SIG VOLT OUT REF POSITION SIGNAL VSS SIGNAL INPUT POWER STEERING CONTROL MODULE (PSCM) (UNDER CENTER OF I/P) PPL PPL (I/P HARN, APPROX 5 CM INTO DATA LINK CONNECTOR BREAKOUT) SECURITY FUSE 21 STEERING WHEEL POSITION SENSOR (ON STEERING COLUMN) SEN RTN VEHICLE CONTROL MODULE (VCM) (IN ENGINE COMPT) VSS OUT WHT WIRE

2-HI IND 2-HI SW 4 LO INDIC CTRL 4 LO SW 4 LOW SELECT SW IN 2 HI SELECT SW IN 4 HI SELECT SW IN BATTERY IN 4-HI IND 4-HI SW 4-LO IND 5 CM FROM TRANSFER CASE RELAY BREAKOUT FROM AXLE SWITCH) 79 CM FROM ENGINE HARNESS BREAK-OUT) BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CHANNEL A CHANNEL B CHANNEL C CHANNEL P DATA LINK CONNECTOR (PARTIAL) (UNDER LEFT SIDE OF DASH) DIESEL DK BLU/WHT WIRE DK GRN/WHT WIRE FRONT AXLE ACTUATOR FRONT AXLE SWITCH FRONT AXLE SWITCH (RIGHT REAR OF FRONT DRIVE AXLE) FUSE 24 GASOLINE GAUGES FUSE 4 GROUND GROUND GROUND BATTERY IN BATTERY IN PNP SWITCH OUT GRY WIRE GRY/BLK WIRE HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) ILLUMINATION LAMP LT BLU WIRE LT GRN WIRE ORG (OR LT GRN/BLK) WIRE ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE, CENTER OF TRANSMISSION) PNK IGNITION IN ENCODER GROUND GROUND 2 HI INDIC CTRL 4 HI INDIC CTRL WIRE PNK WIRE POWERTRAIN CONTROL MODULE (DIESEL) PPL/WHT WIRE REAR LIFTGATE WINDOW RELEASE CIRCUIT RED WIRE RED/WHT WIRE SPARE POWER SOURCE AUXILIARY BATTERY RELAY SPARE POWER SOURCE TAN/BLK WIRE TCASE FUSE 2 TCC/STOP LAMP SWITCH (TOP OF BRAKE PEDAL) TRANS- MISSION CIRCUIT TRANSFER CASE CONTROL MODULE (STEERING COLUMN BRACKET) TRANSFER CASE ENCODER (LEFT SIDE CENTER OF TRANSFER CASE) TRANSFER CASE ENCODER MOTOR (LEFT SIDE OF TRANSFER CASE) TRANSFER CASE RELAY (1-TON VEHICLES ONLY) (RIGHT SIDE OF FIREWALL) TRANSFER CASE SELECT SWITCH TRANSFER CASE SWITCH (TOP LEFT OF TRANSFER CASE) TRANSFER CASE SYNCHRONIZER (TOP OF TRANSFER CASE) TURN B/U FUSE 16 TURN SIGNAL SWITCH WHT WIRE YEL WIRE YEL/BLK WIRE

14 15 16 PNK WIRE 16 PPL 5 6 7 PNK WIRE AUTOMATIC TRANSMISSION INPUT SHAFT SPEED (A/T ISS) SENSOR BALANCE FUEL PUMP (ON INSIDE LEFT FRAME RAIL NEAR FRONT OF REAR TANK) BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN WIRE EVAPORATIVE EMISSION CANISTER VACUUM SWITCH (RIGHT SIDE OF ENGINE) FUEL PUMP BALANCE RELAY (ON FUEL PUMP BALANCE MODULE) FUEL PUMP, SENDER (IN FUEL TANK) FUEL PUMP/ OIL PRESSURE SWITCH (TOP CENTER REAR OF ENGINE, BEHIND DISTRIBUTOR) GAUGES FUSE 4 GRN WIRE GRY WIRE HOT IN OFF, RUN OR START HOT IN RUN OR START I/P FUSE BLOCK IGN E MINI FUSE INPUT FUEL GAUGE INPUT OIL GAUGE INPUT TACHOMETER INSTRUMENT CLUSTER INTAKE AIR TEMPERATURE SENSOR (IN AIR INTAKE DUCT) LT BLU/WHT WIRE LT GRN WIRE M/T ONLY PPL MAP SENSOR (TOP RIGHT CENTER OF ENGINE, NEAR FUEL INJECTORS) MASS AIR FLOW SENSOR (AIR INTAKE DUCT NEAR AIR FILTER) ORG/ WIRE PNK IGNITION WIRE PNK PNK PNK WIRE PNK WIRE PPL PPL (NOT USED) PPL OUTPUT TO GAGE PRIMARY TANK FUEL LEVEL SIGNAL RED WIRE RED/BLK WIRE RELAY CTRL SERVICE ENGINE SOON INDICATOR SPEEDOMETER INPUT TAN WIRE TAN/BLK WIRE THROTTLE POSITION SENSOR (ON SIDE OF THROTTLE BODY) TRANS FUSE 20 UNDERHOOD FUSE-RELAY CENTER UPSHIFT LAMP W/DUAL FUEL TANKS W/DUAL FUEL TANKS W/O DUAL FUEL TANKS W/O DUAL FUEL TANKS W/O DUAL FUEL TANKS W/DUAL FUEL TANKS WHT WIRE YEL WIRE

27 28 29 30 31 PPL 5 VOLT REF BLK WIRE BLU WIRE BRAKE FUSE 18 BRAKE SWITCH ASSEMBLY (AT REAR OF BRAKE PEDAL SUPPORT BRACKET) BRN WIRE CLUTCH PEDAL POSITION (CPP) SWITCH (M/T ONLY) (TOP OF CLUTCH PEDAL) CMP SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DK PNK WIRE ECM FUSE FUEL SOL FUSE ELECTRONIC BRAKE CONTROL MODULE (LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) ENGINE SHUTOFF FUEL SOLENOID SOLENOID DRIVER FUEL SOLENOID FUEL TEMPERATURE SENSOR GRN WIRE GRY WIRE HIGH RES SIG HOT AT ALL TIMES HOT IN HOT IN RUN OR START I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PNK PNK 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 WIRE PNK PNK 8 9 WIRE PNK PNK PNK WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWER DISTRIBUTION SYSTEM PPL PPL (OR BRN/WHT) WIRE PPL PNK WIRE RED WIRE RED/BLK WIRE RUN WIRE SENS GRD STOP/HAZ FUSE 1 TAN WIRE TAN/BLK WIRE TIMING STEPPER MOTOR (TOP FRONT OF ENGINE) TRANS FUSE 20 UNDERHOOD FUSE-RELAY CENTER WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

"GLOW PLUGS" INDICATOR BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM-B FUSE FUEL LIFT PUMP (LEFT FRAME RAIL, BELOW DRIVER'S DOOR) W/DUAL TANKS FUEL PUMP PRIME CONNECTOR FUEL PUMP RELAY (IN UNDERHOOD FUSE-RELAY CENTER) FUEL PUMP/ OIL PRESSURE SWITCH AND SENDER (LEFT REAR OF ENGINE) GAUGES FUSE 4 GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM INSTRUMENT CLUSTER SYSTEM (FUEL PUMP BALANCE RELAY) LT GRN WIRE ORG/ WIRE PNK PNK 8 9 WIRE PNK PNK PNK WIRE PNK WIRE RED WIRE SERVICE ENGINE SOON INDICATOR SERVICE THROTTLE SOON INDICATOR TAN WIRE UNDERHOOD FUSE-RELAY CENTER VEHICLE SPEED INPUT W/DUAL TANKS W/O DUAL TANKS WAIT TO WATER IN FUEL INDICATOR WATER IN-FUEL SENSOR WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

"SERV ENG SOON" IND ENGINE SHUTOFF SOL OUT EGR SOL OUTPUT "SERV THROTTLE SOON" IND EGR VALVE SOL PUTPUT A/C ENABLE PCM GND PCM GND A/C SYSTEM BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (DLC) (LEFT SIDE OF I/P) PPL DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ENG-I FUSE EXHAUST GAS RECIRCULATION (EGR) VENT SOLENOID EXHAUST GAS RECIRCULATION EGR SOLENOID (LEFT REAR TOP OF ENGINE) FUEL HEATER (TOP REAR OF ENGINE) FUEL SOL MODULE (5 VREF) FUSIBLE LINK FUSIBLE LINKS GLOW GLOW PLUG 5 PLUG 7 GLOW GLOW PLUG 6 PLUG 4 GLOW PLUG 1 GLOW PLUG 2 GLOW PLUG 3 GLOW PLUG 8 GLOW PLUG OUTPUT GLOW PLUG RELAY (LEFT REAR OF ENGINE NEAR BULKHEAD) GLOW PLUGS FUSE GRD GROUND GRY WIRE HOT AT ALL TIMES FUSIBLE LINK HOT IN RUN OR START LT GRN WIRE MASS AIR FLOW (MAF SENSOR) ORG/ WIRE PNK IGN WIRE PNK PNK 439 439 IGNITION IGNITION WIRE PNK PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (UNDER RIGHT END OF I/P, ABOVE BLOWER MOTOR) PPL RED WIRE RELAY CTRL SIGNAL TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE-RELAY CENTER WASTEGATE SOL ENGINE SHUTOFF SOL OUT WASTEGATE SOLENOID WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE