Harness Routing Views. HUMMER H2 2003

For 1990-2009 cars only

Makes 🢒 HUMMER 🢒 2003 🢒 H2 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Harness Routing Views

Figure 1:

Forward Lamp Harness Routing


(1)	Washer Fluid Level Sensor Connector
(2)	Windshield Washer Fluid Pump Connector (Reversible)
(3)	Underhood Lamp Inline (If Equipped)
(4)	C103
(5)	Fuse Block-Underhood C4
(6)	Park/Turn Signal Lamp Connector-LF
(7)	Marker Lamp Connector-LF
(8)	Daytime Running Lamp (DRL) Connector-Left
(9)	G100
(10)	S101
(11)	Inflatable Restraint Front End Discriminating Sensor Connector-Left
(12)	Inflatable Restraint Front End Discriminating Sensor Connector-Right
(13)	Horn Connector-Left
(14)	Headlamp Connector-Left
(15)	S100
(16)	Daytime Running Lamp (DRL) Connector-Right
(17)	Horn Connector-Right
(18)	Ambient Air Temperature Sensor Connector-HVAC
(19)	Ambient Air Temperature Sensor Connector-Mirror
(20)	Headlamp Connector-Right
(21)	Marker Lamp Connector-Right
(22)	Park/Turn Signal Lamp Connector-RF

Figure 2:

Forward Lamp Harness to Fuse Block - Underhood


(1)	Fuse Block - Underhood Center Block
(2)	Fuse Block-Underhood-C4 (GRN)
(3)	C103-I/P Harness Side
(4)	Forward Lamp Harness
(5)	C103-Forward Lamp Harness Side

Figure 3:

Engine Harness Routing (6.0L)


(1)	Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor Connector
(2)	A/C Low Pressure Switch Connector
(3)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector
(4)	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Connector
(5)	Manifold Absolute Pressure (MAP) Sensor Connector
(6)	G103
(7)	G104
(8)	Camshaft Position (CMP) Sensor Connector
(9)	C175
(10)	Vehicle Speed Sensor (VSS) Connector
(11)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector
(12)	Park/Neutral Position (PNP) Switch Connector
(13)	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Connector
(14)	S102
(15)	S103
(16)	S104
(17)	Throttle Actuator Control (TAC) Assembly Connector
(18)	C100
(19)	Fuse Block-Underhood C2
(20)	C106
(21)	G102
(22)	A/C Compressor Clutch Connector
(23)	Engine Oil Level Switch Connector
(24)	Crankshaft Position (CKP) Sensor Connector
(25)	A/C Refrigerant Pressure Sensor Connector
(26)	Coolant Level Switch Connector

Figure 4:

Engine Harness to Fuse Block - Underhood


(1)	Fuse Block - Underhood Center Block
(2)	Fuse Block - Underhood-C2 (BLK)
(3)	Engine Harness

Figure 5:

I/P Harness Routing 1 of 2


(1)	Throttle Actuator Control (TAC) Module Connector - C2
(2)	C102 I/P to Chassis Harness
(3)	Fuse Block - Underhood C1
(4)	C101 I/P to Chassis Harness
(5)	C100 I/P to Engine Harness
(6)	C103 I/P to Forward Lamp Harness
(7)	Fuse Block - Underhood C6
(8)	Fuse Block - Underhood C5
(9)	Fuse Block - Underhood C7
(10)	C104 I/P to Chassis Harness
(11)	Trailer Harness Feed
(12)	Windshield Wiper Motor and Module Connector
(13)	Instrument Panel Cluster (IPC) Connector
(14)	Air Temperature Sensor - Upper Right Connector
(15)	Ambient Light/Sunload Sensor Assembly Connector
(16)	Inflatable Restraint I/P Module Connector
(17)	Inflatable Restraint I/P Module Disable Switch Connector
(18)	I/P Compartment Lamp Connector
(19)	Speaker - RF Tweeter Connector
(20)	Junction Block - I/P
(21)	Courtesy Lamp - Right Footwell Connector
(22)	C298 I/P to Body Harness
(23)	C201 I/P to Body Harness
(24)	C200 I/P to Body Harness
(25)	G200

Figure 6:

I/P Harness Routing 2 of 2


(1)	Splice S217
(2)	Splice S210
(3)	Splice S211
(4)	Splice S212
(5)	Splice S213
(6)	Splice S214
(7)	Splice S216
(8)	Splice S215
(9)	Splice S290
(10)	Radio C1 Connector
(11)	Radio C2 Connector
(12)	Longnitudinal Accelerometer Connector
(13)	Inflatable Restraint I/P Module Disable Switch Connector
(14)	Vehicle Communication Interface Module (VCIM) Connectors
(15)	OnStar ® Button Assembly Connector
(16)	Accessory Power Outlet/Cigar Lighter Connectors
(17)	C298 I/P to Body Harness
(18)	Ride Height Switch Connector
(19)	Tow/Haul Switch Connector
(20)	Traction Control Switch Connector
(21)	Transfer Case Shift Control Switch C2 Connector
(22)	Transfer Case Shift Control Switch C1 Connector
(23)	Splice Pack SP205
(24)	Transfer Case Shift Control Module Connectors
(25)	C203 I/P to Steering Column Harness
(26)	Splice Pack SP206
(27)	C202 I/P to Steering Column Harness
(28)	Stop Lamp Switch Connector
(29)	C210 I/P to Headliner Harness
(30)	Relay Block I/P C1
(31)	Park Brake Switch Connector
(32)	Footwell Courtesy Lamp - Left
(33)	Data Link Connector (DLC)
(34)	Fuse Block - I/P C1

Figure 7:

Steering Column Harness Connectors


(1)	Multifunction Switch
(2)	Inflatable Restraint Steering Wheel Module Coil
(3)	C277 (8 Cavity)
(4)	Inflatable Restraint Steering Wheel Module Connector
(5)	Steering Wheel Controls Backlight Fuse
(6)	C203 (2 Cavity)
(7)	Fuse Block - I/P C2 (6 Cavity)
(8)	C202 (52 Cavity)

Figure 8:

Body Harness Routing


(1)	Speaker Right D Pillar Twiddler Connector
(2)	C420
(3)	S480
(4)	Splce Pack SP410
(5)	Door Lock Switch Rear Cargo Connector
(6)	Accessory Power Outlet-Rear Connector
(7)	Marker Lamp-RR Connector
(8)	Clearance Lamp-RR Connector
(9)	Speaker-Left D Pillar Twiddler Connector
(10)	S411
(11)	Marker Lamp-LR Connector
(12)	S412
(13)	C320 (ZM6)
(14)	G302
(15)	C310
(16)	Courtesy Lamp Right B Pillar Connector
(17)	S390
(18)	Fuse Block-I/P C4
(19)	C325 (ZM6)
(20)	Inflatable Restraint Sensing and Diagnostic Module Connector
(21)	Splice Pack SP207
(22)	C200
(23)	C201
(24)	Relay Block-I/P C10
(25)	Body Control Module (BCM)-C6
(26)	Audio Amplifier Connectors
(27)	C355
(28)	C298
(29)	G304
(30)	C375
(31)	S310
(32)	Courtesy Lamp Left B Pillar Connector
(33)	C390
(34)	G306
(35)	C380 (ZM6)

Figure 9:

Body Harness to Fuse Block-I/P


(1)	Fuse Block-I/P
(2)	Fuse Block-I/P -C4 (BRN)
(3)	Body Harness

Figure 10:

Body Harness to Relay Block-I/P


(1)	Relay Block-I/P
(2)	Body Harness
(3)	Relay Block-I/P-C10 (NAT)

Figure 11:

Chassis Harness Routing


(1)	Wheel Speed Sensor (WSS)-RF Connector
(2)	Brake Fluid Level Switch Connector
(3)	C104
(4)	C105
(5)	C102
(6)	Electronically Controlled Air Suspension Relay (ZM6)
(7)	Wheel Speed Sensor (WSS)-LF Connector
(8)	C101
(9)	C106
(10)	Fuse Block-Underhood C3
(11)	Fuse Block-Underhood C9
(12)	Stud 1
(13)	G300
(14)	S304
(15)	Electronic Brake Control Module (EBCM) Connector
(16)	Transfer Case Connector
(17)	Evaporative Emission (EVAP) Canister Vent Solenoid Connector
(18)	G310
(19)	G308
(20)	Air Suspension Sensor-RR Connector (ZM6)
(21)	S391
(22)	S392
(23)	Wheel Speed Sensor (WSS)-RR Connector
(24)	Air Suspension Inflator Switch Connector (ZM6)
(25)	G405
(26)	Junction Block-Rear C1
(27)	Trailer Connector
(28)	G402
(29)	Rear Differential Lock Actuator Connector
(30)	C450 (ZM6)
(31)	C451 (ZM6)

Figure 12:

Chassis Harness to Fuse Block - Underhood


(1)	Fuse Block - Underhood Center Block
(2)	Fuse Block - Underhood - C3 (RED)
(3)	Chassis Harness
(4)	Trailer Power Lead -- Stud 1
(5)	Fuse Block - Underhood - C9 (NAT)

Figure 13:

Roof Marker Harness Routing


(1)	Cellular Telephone Antenna
(2)	GPS Antenna
(3)	Clearance Lamp Connector-LF
(4)	Roof Lamp Connector-Front Center
(5)	Roof Lamp Connector-Front Center
(6)	S345
(7)	Roof Lamp Connector-Front Center
(8)	Clearance Lamp Connector-RF
(9)	S303
(10)	Radio Antenna
(11)	Antenna Preamplifier Connector
(12)	Junction Block-I/P C6

Figure 14:

Roof Marker Harness to Junction Block-I/P


(1)	Junction Block-I/P
(2)	Junction Block-I/P-C6 (LT GRN)
(3)	Roof Marker Harness

Figure 15:

Headliner Harness Routing


(1)	Sunroof Module Connector
(2)	Sunroof Switch Connector
(3)	Courtesy/Reading Lamp-Left Front Connector
(4)	Garage Door Opener Connector
(5)	Inside Rearview Mirror Connector
(6)	Courtesy/Reading Lamp-Right Front Connector
(7)	Noise Cancellation Microphone Connector
(8)	Vanity Mirror-Right Connector
(9)	Courtesy Reading Lamp-Center
(10)	Courtesy Reading Lamp-Rear
(11)	S300
(12)	Ambient Air Temperature Sensor Connector
(13)	Cellular Telephone Microphone Connector
(14)	S305
(15)	S301
(16)	S302 (CF5)
(17)	Sunroof Relay
(18)	Relay Block-I/P C4
(19)	Relay Block-I/P C3
(20)	C210

Figure 16:

Headliner Harness to Relay Block - I/P


(1)	Relay Block - I/P
(2)	Relay Block - I/P-C4 (CRM)
(3)	Relay Block - I/P-C3 (BRN)

Figure 17:

I/P Harness to Fuse Block-Underhood


(1)	Fuse Block-Underhood Center Block
(2)	I/P Harness
(3)	Fuse Block-Underhood-C1 (GRY)
(4)	Fuse Block-Underhood-C7 (GRN)
(5)	Fuse Block-Underhood-C5 (GRY)
(6)	Fuse Block-Underhood-C6 (BLK)

Figure 18:

HVAC Harness to Junction Block-I/P


(1)	Junction Block-I/P-C4 (BRN)
(2)	Junction Block-I/P-C8 (GRY)
(3)	Junction Block-I/P-C5 (BRN)
(4)	Junction Block-I/P

Figure 19:

Junction Block-I/P


(1)	Junction Block-I/P
(2)	I/P Harness
(3)	Footwell Courtesy Lamp Socket-Right
(4)	Footwell Courtesy Lamp Bulb-Right

Figure 20:

Relay Block-I/P-C1


(1)	I/P Harness
(2)	Park Brake Switch Connector
(3)	Relay Block-Body-C1
(4)	Tab
(5)	Relay Block-Body
(6)	Parking Brake Assembly

Figure 21:

Driver Door Harness to Fuse Block-I/P


(1)	Fuse Block-I/P
(2)	Driver Door Harness
(3)	Fuse Block-I/P-C3 (BLK)

Figure 22:

Passenger Door Harness to Junction Block-I/P


(1)	Junction Block-I/P
(2)	Junction Block-I/P-C2 (BLK)
(3)	Junction Block-I/P-C7 (CRM)
(4)	Passenger Door Harness

Figure 23:

Junction Block-Rear


(1)	Junction Block-Rear
(2)	Junction Block-Rear - C1-(Chassis Harness)
(3)	Junction Block-Rear-C2-(Left Tail Lamp Assembly)
(4)	Chassis Harness
(5)	Junction Block-Rear - C3-(Right Tail Lamp assembly)

Figure 24:

Liftgate Harness Routing


(1)	C420
(2)	Roof Lamp-Right Rear Connector
(3)	C900
(4)	Roof Lamp-Center Connector
(5)	CHMSL
(6)	Roof Lamp-Left Rear Connector
(7)	Rear Window Defogger Grid-Left Connector
(8)	License Lamp Connector
(9)	Liftgate Ajar Switch-Left Connector
(10)	Door Lock Actuator-Liftgate Connector
(11)	Rear Window Wiper Motor Connector
(12)	License Lamp Connector
(13)	S902
(14)	Liftgate Ajar Switch-Right Connector
(15)	S901
(16)	Defogger Grid-Right Connector
(17)	S900

Figure 25:

C100


(1)	C100-Engine Harness Side
(2)	C100-IP Harness Side
(3)	Fuse Block-Underhood

Figure 26:

C101,C104 and C106


(1)	Brake Fluid Level Switch
(2)	Fuse Block-Underhood-C9
(3)	Fuse Block-Underhood-C3
(4)	C101-Chassis Harness Side
(5)	C106-Chassis Harness Side
(6)	C104-Chassis Harness Side

Figure 27:

C102


(1)	Stud 2-Trailer Lead Power Feed
(2)	Stud 1
(3)	Fuse Block-Underhood
(4)	IP Harness
(5)	C102

Figure 28:

C103


(1)	Fuse Block-Underhood Center Block
(2)	C103-I/P Harness Side
(3)	C103-Forward Lamp Harness Side

Figure 29:

C105 and C106


(1)	Fuse Block-Underhood Bracket
(2)	C106-Chassis to Engine
(3)	Engine Harness
(4)	Chassis Harness
(5)	C105-Chassis to I/P

Figure 30:

C115


(1)	MAP Sensor
(2)	Knock Sensor Pigtail
(3)	C115-Knock Sensors Inline
(4)	Engine Harness

Figure 31:

C148


(1)	Ignition Coil 7
(2)	Fuel Injector 7
(3)	Fuel Injector 5
(4)	Ignition Coil 5
(5)	Inline C148
(6)	Ignition Coil 3
(7)	Fuel Injector 3
(8)	Ignition Coil 1
(9)	Fuel Injector 1
(10)	Engine Harness

Figure 32:

C158


(1)	Fuel Injector 2
(2)	Ignition Coil 2
(3)	Fuel Injector 4
(4)	Ignition Coil 4
(5)	C158-Ignition Coil Inline
(6)	Fuel Injector 6
(7)	Ignition Coil 6
(8)	Ignition Coil 8
(9)	Fuel Injector 8

Figure 33:

C175


(1)	Automatic Transmission
(2)	C175

Figure 34:

C200, C201 and Splice Pack SP207


(1)	C200
(2)	Splice Pack SP207
(3)	C201
(4)	Left Side Cowl Panel

Figure 35:

C202 and C203


(1)	Steering Column
(2)	C203
(3)	C202

Figure 36:

C210


(1)	C210 Headliner Harness Side

Figure 37:

C298


(1)	RH Cowl Panel
(2)	C298-Body Harness Side
(3)	C298-I/P Harness Side

Figure 38:

C310-LR Shown-RR Similar


(1)	C310-Body Harness Side
(2)	C310-LR Door Harness Side
(3)	Passthrough Grommet
(4)	B Pillar

Figure 39:

C320 and C380


(1)	Rear Seat Assembly
(2)	C320
(3)	C380
(4)	Body Harness

Figure 40:

C325-Driver Shown-Passenger Similar


(1)	Driver Seat
(2)	C325-Driver Seat Harness

Figure 41:

C325,C326,C327,C328,C329 and C330-Driver Seat Inlines


(1)	C327
(2)	Seat Adjuster Switch-Driver
(3)	Memory Seat Module-C4
(4)	Memory Seat Module-C3
(5)	Seat Bolster/Lumbar Switch-Driver
(6)	Seat Recline Motor-Driver
(7)	C325
(8)	C329
(9)	C330
(10)	C328
(11)	Seat Rear Vertical Motor-Driver
(12)	Seat Front Vertical Motor-Driver
(13)	Memory Seat Module-C2
(14)	Memory Seat Module-C1
(15)	Seat Horizontal Motor-Driver
(16)	C326

Figure 42:

C333


(1)	Seat Bolster Motor-Driver
(2)	Seat Lumbar Motor-Driver
(3)	Heated Seat Element-Driver Cushion
(4)	C333
(5)	Seat Belt Switch Connector
(6)	Heated Seat Element-Driver Cushion Connector

Figure 43:

C350


(1)	Front Floor Console
(2)	I/P Harness
(3)	C350-I/P Harness Side
(4)	Audio Amplifier
(5)	C350-Console Harness Side
(6)	Accessory Power Outlets-Rear
(7)	Rear Seat Audio (RSA)

Figure 44:

C355


(1)	C355
(2)	Body Harness
(3)	Audio Amplifier
(4)	Audio Amplifier Connectors

Figure 45:

C375,C376 and C377


(1)	Seat Horizontal Motor-Front Passenger
(2)	Seat Front Vertical Motor-Front Passenger
(3)	Seat Rear Vertical Motor-Front Passenger
(4)	C376
(5)	C377
(6)	C375
(7)	Seat Recline Motor-Front Passenger
(8)	Seat Bolster/Lumbar Switch-Front Passenger
(9)	Seat Adjuster Switch-Front Passenger

Figure 46:

C378


(1)	Seat Bolster Motor-Passenger
(2)	Seat Lumbar Motor-Passenger
(3)	Heated Seat Element-Passenger Cushion Connector
(4)	C378

Figure 47:

C420


(1)	C420-Liftgate Harness Side
(2)	C420-Body Harness Side
(3)	Liftgate
(4)	Liftgate Harness

Figure 48:

C450 and C451


(1)	C451
(2)	C450
(3)	Air Suspension Compressor

Figure 49:

C900


(1)	Liftgate Jumper Harness
(2)	C900
(3)	Liftgate

Figure 50:

Splice S100


(1)	Forward Lamp Harness
(2)	Radiator Support
(3)	S100
(4)	Horn Connector

Figure 51:

Splice S101


(1)	Ambient Temperature Sensor-Mirror
(2)	Radiator Support
(3)	S101

Figure 52:

Splice S102


(1)	MAP Sensor
(2)	Knock Sensor Pigtail
(3)	C115-Knock Sensors Inline
(4)	Engine Harness

Figure 53:

Splices S301, S302 and S305


(1)	S302
(2)	S305
(3)	S301
(4)	Headliner Harness
(5)	Sunroof Relay

Figure 54:

S304


(1)	S304
(2)	G300
(3)	Chassis Harness
(4)	Electronically Controlled Air Suspension Relay

Figure 55:

Splice S303 and S345


(1)	Clearance Lamp-LF
(2)	Roof Marker Lamp Harness
(3)	Clearance Lamp Connector-LF
(4)	Cell Phone/GPS Antenna
(5)	Roof Lamp-Center Front
(6)	Roof Lamp-Center Front
(7)	Splice S345
(8)	Roof Lamp-Center Front
(9)	Splice S303

Figure 56:

Splices S350 and S351


(1)	Console Harness
(2)	Floor Shifter
(3)	S350
(4)	S351

Figure 57:

S391 and S392


(1)	Fuel Tank Pressure (FTP) Sensor Connector
(2)	Air Suspension Sensor Connector-RR
(3)	G308
(4)	S391
(5)	S392

Figure 58:

Splices S900, S901 and S902


(1)	Center High Mounted Stop Lamp (CHMSL) Connector
(2)	Rear Window Defogger Grid Connector
(3)	Rear Window Defogger Grid Connector
(4)	Splice S900
(5)	Rear Window Wiper Module - w/Motor
(6)	Door Lock Actuator - Liftgate
(7)	Liftgate Ajar Switch - Left
(8)	Liftgate Ajar Switch - Right
(9)	Splice S902
(10)	Splice S901