Harness Routing Views. Chevrolet Blazer - 4WD

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 Blazer - 4WD - RHD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Harness Routing Views

Figure 1:

Forward Lamps Wiring Harness


(1)	Ambient Air Temperature Sensor (DIC)
(2)	Headlamp, High Beam - Left Connector
(3)	Ground G111
(4)	Splice Pack SP100
(5)	Headlamp, Low Beam - Left Connector
(6)	Forward Lamps Wiring Harness
(7)	Turn Signal Lamp - LF
(8)	Headlamp Washer Pump Fluid Reservoir
(9)	Headlamp Washer Fluid Pump Connector
(10)	S109 and S110
(11)	Headlamp Washer Fluid Pump Relay
(12)	Splice Pack SP101
(13)	Turn Signal Lamp - RF
(14)	Headlamp, High Beam - Right Connector
(15)	Headlamp, Low Beam - Right Connector
(16)	Radiator Support
(17)	S108
(18)	S112
(19)	S111
(20)	Ground G112

Figure 2:

Radiator Support, Inside RH


(1)	Radiator Support
(2)	Forward Lamps Harness
(3)	Splice Pack SP101
(4)	Ground G112

Figure 3:

Battery Fuse


(1)	Radiator Support
(2)	Fuse Holder - Battery Fuse
(3)	G108
(4)	S153

Figure 4:

Front Frame Grounds


(1)	Wheel Speed Sensor (WSS) -- LF
(2)	Inflatable Restraint Front End Discriminating Sensor -- Left
(3)	Inflatable Restraint Front End Discriminating Sensor -- Right
(4)	G106
(5)	G118
(6)	Wheel Speed Sensor (WSS) -- RF

Figure 5:

Negative Battery Cable


(1)	Water Pump
(2)	G107
(3)	Negative Battery Cable

Figure 6:

Body Harness, Right Front


(1)	Brake Pressure Differential Switch Connector
(2)	Electronic Brake Control Module (EBCM)
(3)	Fuse Block-Underhood, Connector C1
(4)	Fuse Block-Underhood, Connector C5
(5)	Fuse Block-Underhood, Connector C6
(6)	C114
(7)	G110
(7)	G110
(8)	G108, G112
(9)	Right Front Radiator Support
(10)	Right Front Fender
(11)	C106
(12)	C109

Figure 7:

Forward Lamps Harness, LH


(1)	C132
(2)	Repeater Lamp -- LF Extension Harness
(3)	Horn -- Left
(4)	Horn -- Left Connector
(5)	Repeater Lamp -- LF Connector
(6)	Forward Lamps Harness
(7)	C130
(8)	Fender, LH

Figure 8:

Engine Wiring, RH Side


(1)	Ignition Control Module (ICM)
(2)	Ignition Coil
(3)	Ignition Coil Assembly
(4)	Generator
(5)	Crankshaft Position (CKP) Sensor
(6)	S100
(7)	S101
(8)	S102
(9)	Starter Solenoid
(10)	Starter

Figure 9:

Engine Wiring, Top Left


(1)	Mass Airflow (MAF) Sensor Connector
(2)	Intake Air Temperature (IAT) Sensor Connector
(3)	C103

Figure 10:

Engine Wiring, Right Rear


(1)	Evaporative Emission (EVAP) Canister Purge Solenoid
(2)	Manifold Absolute Pressure (MAP) Sensor
(3)	Engine Wiring Harness
(4)	G102, G103
(5)	Engine Oil Pressure (EOP) Sensor Connector
(6)	S152
(7)	G104, G105
(8)	Camshaft Position (CMP) Sensor Connector
(9)	Central Sequential Fuel Injection (Central SFI) Connector

Figure 11:

Engine Wiring- LR


(1)	Throttle Position (TP) Sensor Connector
(2)	Idle Air Control (IAC) Valve Connector
(3)	Knock Sensor (KS) Connector
(4)	Engine Coolant Temperature (ECT) Sensor Connector
(5)	A/C High Pressure Switch
(6)	A/C Compressor Clutch Connector
(7)	A/C Compressor Clutch Diode, S103 and S104

Figure 12:

Body Harness, Bulkhead


(1)	Electronic Brake Control Module (EBCM) Connector C1
(2)	G117
(3)	S117
(4)	Body Wiring Harness
(5)	S119
(6)	Flash-to-Pass Relay
(7)	Park Lamp Switch Relay
(8)	S113
(9)	S118
(10)	S138
(11)	C103
(12)	Underhood Lamp Connector
(13)	Front Axle Vacuum Solenoid
(14)	Windshield Wiper Motor Connector
(15)	S127, S122
(16)	Electronic Brake Control Module (EBCM) Connector C3
(17)	Brake Pressure Differential Switch
(18)	Cruise Control Module (CCM) Connector

Figure 13:

Automatic Transmission C175


(1)	Automatic Transmission
(2)	C175
(3)	Engine Harness
(4)	Engine Harness

Figure 14:

Manual Transmission Harness View


(1)	Manual Transmission
(2)	Heated Oxygen Sensor- LF, H02S, Bank 1, Sensor 1
(3)	Backup Lamp Switch Connector
(4)	C104, Chassis Harness
(5)	C104, Engine Harness
(6)	C105
(7)	Engine Harness

Figure 15:

Transfer Case (NP8) Harness Routing View


(1)	C116, C2 - M50 Only
(2)	Active Transfer Case Harness
(3)	Propshaft Speed Sensor - Rear
(4)	Transfer Case Encoder Motor, C2
(5)	Transfer Case Encoder Motor, C1
(6)	Vehicle Speed Sensor (VSS)
(7)	Transfer Case (NP8)
(8)	Propshaft Speed Sensor - Front
(9)	S134
(10)	C116, C2 - M30 Only

Figure 16:

Heated Oxygen Sensor (HO2S) Extension Harness


(1)	C100
(2)	Heated Oxygen Sensor (HO2S) Extension Harness
(3)	Heated Oxygen Sensor (HO2S) Bank 2, Sensor 1
(4)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 2

Figure 17:

I/P Wiring Harness


(1)	Passenger Inflatable Restraint Module
(2)	Inflatable Restraint I/P Module Connector
(3)	I/P Compartment Lamp

Figure 18:

Body Harness, Left Front


(1)	Air Temperature Actuator
(2)	Radio Antenna Cable
(3)	Vacuum Control Assembly
(4)	S200
(5)	Body Harness to the Automatic Transmission
(6)	S216
(7)	S222
(8)	S219
(9)	G200, G201, G202
(10)	S209
(11)	Headlamp Grounding Relay
(12)	C200
(13)	C203
(14)	Transfer Case Shift Control Module, Connector C2
(15)	Transfer Case Shift Control Module
(16)	Transfer Case Shift Control Module, Connector C1
(17)	C209
(18)	S228, S229, D101
(19)	S213

Figure 19:

Body Harness, Right Front


(1)	Stop Lamp Switch
(2)	P100
(3)	S231, S232, D200
(4)	S221
(5)	Relay Block - Body
(6)	C217
(7)	S223, S224, D202
(8)	S211
(9)	G204, G205
(10)	G203
(11)	Remote Control Door Lock Receiver (RCDLR) - Japan Only
(12)	Data Link Connector (DLC)
(13)	S235, S236, D201
(14)	C214
(15)	C211
(16)	Body Control Module (BCM), Connector C2
(17)	Body Control Module (BCM), Connector C1
(18)	Air Temperature Sensor - Lower
(19)	S201
(20)	S202
(21)	S212
(22)	Clutch Start Switch Connector
(23)	S207
(24)	S203
(25)	S204

Figure 20:

Instrument Panel - RH


(1)	I/P Dimmer Switch Connector
(2)	Fuse Block - I/P
(3)	I/P Harness
(4)	S230
(5)	C217
(6)	Door Jamb Switch - Driver Connector
(7)	Side Door Jamb Switch - Driver
(8)	Fuse Block - I/P Access Panel
(9)	Fog Lamp Switch - Rear
(10)	Fog Lamp Switch - Front
(11)	Instrument Panel
(12)	I/P Dimmer Switch

Figure 21:

Accessory Power Outlet Tray


(1)	Accessory Power Outlet Harness
(2)	C223
(3)	I/P Insulator
(4)	Accessory Power Outlet Tray
(5)	Accessory Power Outlet - Right
(6)	Accessory Power Outlet - Left
(7)	S268
(8)	S269

Figure 22:

I/P Wiring Harness Composite View


(1)	Remote Control Door Lock Receiver (RCDLR) Connector
(2)	Hazard Switch Connector
(3)	Transfer Case Shift Control Switch Connectors C2 and C1
(4)	Air Temperature Sensor - Upper
(5)	Radio Connector
(6)	HVAC Control Module Connector
(7)	Speaker - LF Connector
(8)	Ambient Light Sensor Connector
(9)	I/P Compartment Lamp
(10)	Inflatable Restraint I/P Module
(11)	Instrument Panel
(12)	S227
(13)	C203
(14)	C200
(15)	Courtesy Lamp - Left Console
(16)	C223
(17)	S208, S272, S273, S274, S275, S287, S288
(18)	SP203
(19)	C224
(20)	S283
(21)	S205, S224, S225, S226
(22)	Body Control Module Connector C3
(23)	Sunload Sensor Connector
(24)	Courtesy Lamp - Right Console
(25)	C217
(26)	S230
(27)	Door Jamb Switch - Driver
(28)	Fuse Block - I/P
(29)	Speaker - RF Connector
(30)	I/P Dimmer Switch Connector
(31)	Fog Lamp Switch - Rear
(32)	Instrument Panel Cluster (IPC) Connector
(33)	S223

Figure 23:

Automatic Transmission Control Module


(1)	Automatic Transmission Control Module
(2)	Park Lock Solenoid
(3)	Park Brake Switch
(4)	Automatic Transmission Shift Lever Position Indicator
(5)	S206
(6)	A/T Shift Lock Control Solenoid
(7)	Body Harness to Rear Wiper/Washer and Endgate Window Release Switch
(8)	Automatic Transmission Control Module Connector

Figure 24:

Dome Lamp Harness - w/Sunroof


(1)	Air Temperature Sensor Assembly - Inside
(2)	S300
(3)	Sunroof Motor and Drive
(4)	Sunroof Module, Connector C2
(5)	Sunroof Module, Connector C1
(6)	C300
(7)	Sunroof Module
(8)	S310
(9)	Vanity Mirror Lamp - Left
(10)	S302
(11)	S332
(12)	Vanity Mirror Lamp - Right
(13)	Driver Information Center (DIC) Connector C1
(14)	Driver Information Center
(15)	Driver Information Center (DIC) Connector C2

Figure 25:

Floor Panel


(1)	S305
(2)	S309
(3)	S306
(4)	S308
(5)	C317
(6)	S304
(7)	Inflatable Restraint Sensing and Diagnostic Module (SDM)Connector
(8)	Inflatable Restraint Sensing and Diagnostic Module (SDM)
(9)	C315
(10)	S301

Figure 26:

Body Wiring to Left Front Seat


(1)	C317
(2)	Seat

Figure 27:

Seat Harness Routing, 8-Way w/o Memory


(1)	Seat Cushion, Bottom
(2)	Seat Lumbar Motor Connector - Front Passenger, Driver Similar
(3)	Seat adjuster Switch - Front Passenger, Driver Similar
(4)	Heated Seat Control Module Connector - Front Passenger, Driver Similar
(5)	C302 - LH, C303 - RH

Figure 28:

Door Harness - RF Shown, LF Opposite


(1)	Outside Rearview Power Folding Mirror Switch Connector
(2)	S603 - RH, S502 - LH
(3)	S604 - RH
(4)	Door Lock Cylinder Switch - Driver Connector
(5)	Door Handle Switch - Right Connector
(6)	Door Lock Actuator - Driver Connector
(7)	Window Motor - Driver Connector C1
(8)	Window Motor - Driver Connector C2
(9)	Speaker - RF Door Connector
(10)	S600 - RH
(11)	S602 - RH
(12)	P600 - RH, P500 - LH
(13)	C610 - RH
(14)	C601 - RH, C501 - LH
(15)	Outside Rearview Mirror Connector - Driver
(16)	S601 - RH, S501 - LH

Figure 29:

Outside Rearview Mirror


(1)	P501 - LH, P601 - RH
(2)	Outside Rearview Mirror - Passenger, Driver Similar
(3)	Outside Rearview Mirror Connector - Passenger, Driver Similar

Figure 30:

Rear Door Harness Routing - RH Shown, LH Opposite


(1)	P800 - RH or P700 - LH
(2)	C306 - RH or C304 - LH
(3)	Door Jamb Switch - RR, LR Similar
(4)	Door Jamb Switch Connector - RR, LR Similar
(5)	C307 - RH or C305 - LH
(6)	S305 - RH or S308 - LH
(7)	Wiring Harness, Body
(8)	S301 - RH or S306 - LH
(9)	Rear Door - Right, Left Similar

Figure 31:

Rear Frame Location View


(1)	Trailer Wiring Provision
(2)	Splice Pack SP423
(3)	Evaporative Emission (EVAP) Canister Vent Solenoid
(4)	C430
(5)	Fuel Filler Neck Ground Strap
(6)	G402

Figure 32:

Accessory Power Outlet - Rear


(1)	Body Side Trim Panel
(2)	Accessory Power Outlet - Rear

Figure 33:

Body Opening Frame, Rear


(1)	Rear Body Wiring Harness
(2)	C403
(3)	G450
(4)	S427
(5)	S428
(6)	G420
(7)	C402
(8)	S406
(9)	S405
(10)	S404

Figure 34:

Body Opening Frame, Rear Window Defogger, Extension Harness


(1)	Endgate
(2)	Rear Window Defogger Connector, RH - C432, LH - C433
(3)	Rear Window Defogger Extension Harness

Figure 35:

Rear Roof Lighting


(1)	Center High Mount Stop Lamp (CHMSL)
(2)	Cargo Lamp
(3)	Cargo Lamp Connector
(4)	Center High Mounted Stop Lamp (CHMSL) Connector
(5)	Body Wiring Harness

Figure 36:

Endgate Connectors


(1)	Body Floor
(2)	C411, C412 and C413
(3)	Endgate
(4)	Window Washer Tube Check Valve, Rear

Figure 37:

Liftglass Release


(1)	Endgate
(2)	Window Wiper Motor Controller - Rear Connector
(3)	Rear Window Wiper Motor Controller - Rear
(4)	Rear Window Wiper Cutout and Liftglass Ajar Jamb Switch Connector
(5)	Rear Window Wiper Cutout and Liftglass Ajar Jamb Switch
(6)	Endgate Lock Cylinder Switch
(7)	P900
(8)	Liftglass Release Actuator Connector
(9)	Endgate Lock Cylinder Switch Connector

Figure 38:

Rear Lamp Connectors - LR shown, RR Similar


(1)	Rear Lamp Wiring Harness
(2)	Tail/Stop Lamp - Left, Right Similar
(3)	Turn Signal Lamp - LR, RR Similar
(4)	Backup Lamp - Left, Right Similar
(5)	Fog Lamp - LR, RR Similar
(6)	S419 (LH) and S420 (RH)
(7)	C403 (LH) and C402 (RH)
(8)	P403 (LH) and P402 (RH)

Figure 39:

Rear License Lamps


(1)	C430
(2)	License Lamp Mounting Bracket
(3)	License Lamp - Right
(4)	License Lamp - Center
(5)	License Lamp - Left
(6)	S425
(7)	S426
(8)	License Lamp Wiring Harness