All Wiring Diagrams for Hummer H3 2008 – Schemi elettrici per auto

AIR CONDITIONING

Compressor Wiring Diagram for Hummer H3 2008

List of elements for Compressor Wiring Diagram for Hummer H3 2008:

(in hvac harness, approximately 13.5 cm (5.3 in) before breakout to evaporator temperature sensor) j250
5v ref
A/c clutch diode 90
A/c clutch relay
A/c compressor clutch (part of a/c compressor)
A/c on ind
A/c on switch
A/c refrigerant pressure sensor (on high pressure hose connection to compressor)
A/c req sig
A41
A42
A43
Ac clutch fuse 48 10a
Body control module (bcm) (behind right front kick panel)
Computer data lines system
Engine control module (ecm) (right rear corner of engine compt)
Evap temp sig
Evaporator temperature sensor (behind right lower dash)
G103 (on lower left side of engine block, forward of g102)
Hot at all times
Hot w/ run/ crank relay 78 energized
Hvac control module (beneath radio)
Logic
Low ref
Manual a/c circuit
Press sens sig
Rly ctrl
Serial data
Underhood fuse block (above left front wheelwell)

Manual A/C Wiring Diagram (1 of 2) for Hummer H3 2008

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List of elements for Manual A/C Wiring Diagram (1 of 2) for Hummer H3 2008:

(behind right front kick panel) body control module (bcm)
(in i/p harness, approximately 2.5 cm (1 in) to right of data link connector in main bundle) j214
5v ref
A/c on ind
A/c on switch
A/c recir req sig
A/c req sig
A26
A41
A42
A43
Air temp a
Blower motor (below right side of dash)
Blower motor resistor assembly (attached to bottom of blower)
Blower motor switch
Computer data lines system
Defog ind cctrl
Defog sw sig
Defogger system
Dimmer sw sig
Evap temp sig
G106 (on right inner front wheelwell)
G300 (under driver seat carpet, on floor board)
Grd
High
High speed blower motor relay (attached to blower motor case)
Hot at all times
Hvac blwr fuse 82 30a
Hvac cntrl hd fuse 59 10a
Hvac control module (beneath radio)
Hvac relay
Ign 3 volt
Ign rly ctrl
Interior lights system
J205
J206
J251
L air temp b
L air temp sig
Logic
Low
Low ref
Mode door b
Mode door sig
Mode switch
Off
Pnk
R air temp b
R air temp sig
Rdo fuse 13 10a
Recir- culation ind
Recir- culation switch
Recirc a
Recirc b
Serial data
Tan
Temperature switch
Underhood fuse block (above left front wheelwell)

Manual A/C Wiring Diagram (2 of 2) for Hummer H3 2008

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List of elements for Manual A/C Wiring Diagram (2 of 2) for Hummer H3 2008:

(in hvac harness, approximately 10 cm (3.9 in) back from right air temperature actuator connector)
(in hvac harness, approximately 28.5 cm (11.2 in) back from right air temperature actuator connector) j240
13.5 cm (5.3 in) before breakout to evaporator temperature sensor) j250
3.7l
5.3l
5v ref
A/c clutch diode 90
A/c clutch relay 76
A/c compressor clutch (part of a/c compressor)
A/c refrigerant pressure sensor (on high pressure hose connection to compressor)
Ac clutch fuse 48 10a
Computer data lines system
Ect sens sig
Engine control module (ecm) (right rear corner of engine compt)
Engine coolant temperature (ect) sensor (front left of engine)
Evaporator temperature sensor (behind right lower dash)
G103 (on lower left side of engine block, forward of g102)
Hot at all times
Hot w/ run/ crank relay 78 energized
J230
J232
Left air temperature actuator (mounted to left side of hvac module assembly)
Logic
Low ref
Mode actuator (on side of heater box)
Nca
Press sens sig
Recirculation actuator (upper right corner of heater case)
Right air temperature actuator (mounted to right side of hvac module assembly)
Rly ctrl
Serial data
Tan
Underhood fuse block (above left front wheelwell)

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram (1 of 2) for Hummer H3 2008

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List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Hummer H3 2008:

5v ref
Abs/vses fuse 29 10a
Abs/vses1 -mtr
Abs/vses2 -sol fuse 64 30a
Batt +
Bkup volt
Brake fluid level switch (on left side of brake fluid reservoir)
Brake pressure modulator valve (bpmv)
Brk fld sig
Can h
Can l
Dlvrd torq sig
Electronic brake control module (ebcm) (left of master cylinder)
Exterior lights system
Fuse 67 40a
G105 (on left inner front wheelwell, behind battery)
Gnd
Grd
Hot at all times
Hot w/ run/crnk relay energized
Ign 1 volt
Ign 3 volt
J110
Left front wheel speed sensor (wss) (attached to left front wheel hub)
Left rear wheel speed sensor (wss) (attached to left side of rear axle)
Lf spd low ref
Lf spd sig
Low ref
Lr spd low ref
Lr spd sig
Pnk
Red
Req torq sig
Rf spd low ref
Rf spd sig
Right front wheel speed sensor (wss) (attached to right front wheel hub)
Right rear wheel speed sensor (wss) (attached to right side of rear axle)
Rr spd low ref
Rr spd sig
Serial class 2
Steering pos sig
Steering sig a
Steering sig b
Stop fuse 54 15a
Stop lamp switch (above brake pedal assembly)
Stop lp volt
Tan
Underhood fuse block (above left front wheelwell)

Anti-lock Brakes Wiring Diagram (2 of 2) for Hummer H3 2008

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List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Hummer H3 2008:

A17
A31
A37
A38
A39
A41
Abs ind
Accessory switch
Body control module (bcm) (behind right front kick panel)
Brake ind
Can h
Can l
Class 2 (ebcm)
Class 2 serial data
Data link connector (dlc) (left side of dash)
Delivered torque signal
Driver info center
Engine control module (ecm) (right rear corner of engine compt)
G106 (on right inner front wheel well)
G300 (under driver seat carpet, on floor board)
Gnd
Hot w/ hvac relay energized
Ign
Ign 3 volt
Instrument panel cluster (ipc)
Interior lights system
J141
J205
J300
Logic
Park brake switch (left lower side of dash)
Park brk sw sig
Pulse sig steering
Requested torque signal
Sig a steering
Stability caution ind
Steering sig b
Steering wheel position sensor (w/ active brake control) (near base of steering column)
Stop lp volt
Trac ctrl sw sig
Traction control switch
Underhood fuse block (above left front wheelwell)
Vses/abs fuse 52 10a
Yaw & lateral accelerometer sensor (w/ active brake control) (under driver seat near x307)

ANTI-THEFT

Forced Entry Wiring Diagram for Hummer H3 2008

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List of elements for Forced Entry Wiring Diagram for Hummer H3 2008:

A19
A24
A25
A32
A38
A39
A40
A44
A47
Bcm fuse 14 10a
Body control module (bcm) (behind right front kick panel)
Class 2 serial data
Clstr fuse 19 10a
Driver door jamb switch (in lower left "b" pillar)
Engine control module (right rear corner of engine compt)
Exterior lights system
Frt trn/hazrd/ ctsy mir fuse 56 15a
G300 (under driver seat carpet, on floor board)
G320 (under rear of middle console carpet, on floor board)
Gnd
Headlamp rly ctrl
Headlights system
Horn rly ctrl
Horns system
Hot at all times
Instrument panel cluster
J300
J320
J347 (in body harness, approximately 42 cm (16.5 in) rearward of breakout to right seat belt pretensioner)
Left rear door jamb switch (in lower left "c" pillar)
Lf door jamb sig
Liftgate ajar switch (in right "d" pillar)
Lr dr jamb sig sw
Parklamp rly ctrl
Passenger door jamb switch (in lower right "b" pillar)
Rear trn/ hazrd fuse 20 20a
Rf dr jamb sig sw
Right rear door jamb switch (in lower right "c" pillar)
Rr dr jamb sw sig
Security ind ctrl
Security indicator
Underhood fuse block (above left front wheelwell)

Immobilizer Wiring Diagram for Hummer H3 2008

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List of elements for Immobilizer Wiring Diagram for Hummer H3 2008:

A19
A39
Acc
Batt ign switch fuse 5 10a
Batter
Body control module (bcm) (behind right front kick panel)
Clstr fuse 19 10a
Computer data lines system
G300 (under driver seat carpet, on floor board)
Ground
Hot at all times
Ign vol
Ign volt
Ignition switch
Instrument panel cluster (ipc)
J200
J201
J251
Lock
Run
Security ind
Ser data
Serial data
Start
Theft deterrent module (tdm)
Underhood fuse block (above left front wheelwell)

BODY CONTROL MODULES

Body Control Modules Wiring Diagram (1 of 2) for Hummer H3 2008

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List of elements for Body Control Modules Wiring Diagram (1 of 2) for Hummer H3 2008:

(under rear of middle console carpet, on floor board) g320
A/c req sig
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
A32
A33
A34
A35
A36
A37
A38
A39
A40
A41
A42
A43
A44
A45
A46
A47
A48
Accessory voltage
Air conditioning system
Anti-lock brakes system
Battery +
Bcm fuse 14 10a
Body control module (bcm) (behind right front kick panel)
Class 2 serial data
Computer data lines system
Courtesy lamp low ctrl
Defogger system
Door locks system
Door unlock ctrl
Drl rly ctrl
Engine controls system
Exterior lights system
Fog lamp rly ctrl
Frt trn/hazrd/ ctsy mir fuse 56 15a
Ground
Headlamp rly ctrl
Headlights system
Hi beam rly ctrl
Horn rly ctrl
Horns system
Hot at all times
Ign rly ctrl
Inadvertent pwr ctrl
Interior lights system
J320
Left trn sig lamp ctrl
Lf door ajar sw sig
Lr door ajar sw sig
Lr park lamps ctrl
Lr stop/turn lamp ctrl
Mirrors system
Park brake sw sig
Park lamp rly ctrl
Pass dr lock sw lock ctrl
Power distribution system
Rap rly coil ctrl
Rear defog rly ctrl
Rear trn/ hazrd fuse 20 20a
Red
Rf door ajar sw sig
Right trn sig lamp ctrl
Rr door ajar sw sig
Rr stop/turn lamp ctrl
Run/crnk voltage
Starting/charging system
Stop lamp volt
Underhood fuse block (above left front wheelwell)
Windshield washer pmp ctrl
Wiper mtr prk sw sig
Wiper sw sig 2
Wiper/washer system

Body Control Modules Wiring Diagram (2 of 2) for Hummer H3 2008

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List of elements for Body Control Modules Wiring Diagram (2 of 2) for Hummer H3 2008:

A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
A32
A33
A34
A35
A36
A37
A38
A39
A40
A41
A42
A43
A44
A45
A46
A47
A48
Acc
Accessory voltage
Ambient light sens low ref
Ambient light sens sig
Anti-lock brakes system
Anti-theft system
Body control module (bcm) (behind right front kick panel)
Cellular phones system
Class 2 serial data
Computer data lines system
Courtesy lamp ctrl
Courtesy lamp low ctrl
Defogger system
Dome override sw sig
Exterior lights system
Flash to pass sw sig
Front fog lamp sw sig
Front fog lamps ind ctrl
Hazard sw sig
Headlamp sw headlamps on sig
Headlamps dim sw hi beam sig
Headlamps sw off sig
Headlights system
Horn rly ctrl
Horns system
Hot at all times
I/p lamp dimmer sw sig
I/p lamps dim ctrl
Ign key resistor sig
Ignition switch
Inadvertent pwr ctrl
Int lamp sw sig
Interior lights system
J201
Key-in ignition switch
Low ref
Off
Off/run/crnk voltage
Onstar voice sig
Park lamp sw sig
Rear defog ind ctrl
Rear defog sw sig
Red
Rr turn signal lamp ctrl
Run
Run/crnk voltage
Security ind lamp
Shift interlock system
Shift sol ctrl
Start
Tan
Traction ctrl sw sig
Turn sig sw sig
Windshield washer pmp ctrl
Wiper sw sig 1
Wiper/washer system

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram for Hummer H3 2008

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List of elements for Computer Data Lines Wiring Diagram for Hummer H3 2008:

(under driver seat carpet, on floor board) g300
A/t
A38
A39
A41
A42
A44
A47
Aux pwr 1 fuse 51 20a
Body control module (bcm) (behind right front kick panel)
Cigar lighter
Class 2 serial data
Data link connector (dlc) (left side of dash)
Data link resistor
Digital radio receiver (right side of dash)
Electronic brake control module (ebcm) (left of master cylinder)
Engine control module (ecm) (right rear corner of engine compt)
G106 (on right inner front wheelwell)
Generator battery control module (left front of engine compt, near battery)
Hi spd lan serial data +
Hi spd lan serial data -
Hi spd serial data bus +
Hi spd serial data bus -
Hot at all times
Inflatable restraint sensing & diagnostic module (sdm) (beneath lower console)
Instrument panel cluster (ipc)
J202
J203
J205
J251
M/t
Radio
Tan
Theft deterrent module (tdm)
Transfer case shift control module (behind glove box)
Transmission control module (tcm)
Underhood fuse block (above left front wheelwell)
Vehicle communication interface module (vcim) (center of dash below hvac control head)

CRUISE CONTROL

Cruise Control Wiring Diagram for Hummer H3 2008

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List of elements for Cruise Control Wiring Diagram for Hummer H3 2008:

5 volt reference 2
5-volt reference 1
5-volt reference 2
A/t
Accelerator pedal position (app) sensor (on accelerator pedal bracket)
App sensor 1 signal
App sensor 2 signal
Class 2 serial data
Clstr fuse 19 10a
Computer data lines system
Cruise control on/off switch
Cruise control release signal
Cruise control release switch (top of brake pedal assembly)
Cruise control switch
Cruise indicator
Cruise/misc fuse 35 10a
Engine control module (ecm) (right rear of engine compartment)
G300 (under driver seat carpet, on floor board)
Gmlan hi (+)
Gmlan hi (-)
Gnd
Hot at all times
Hot w/ run/ crank relay energized
Instrument panel cluster (ipc)
J215 (in body harness, approximately 14 cm (5.5 in) to right of stop lamp switch breakout in main harness)
J251
Logic
Low reference
M/t
Off
On/
Pnk
Power distribution system
Res+
Set-
Stop fuse 54 15a
Stop lamp control
Stop lamp switch (above brake pedal assembly)
Tac motor control-1
Tac motor control-2
Tan
Throttle body (top of engine, mounted on upper air intake manifold)
Tp sensor 1 signal
Tp sensor 2 signal
Transmission control module (tcm)
Turn signal/multi-function switch
Underhood fuse block (above left front wheelwell)
Vehicle speed sensor (vss) (left rear of transfer case)
Vss high signal
Vss low signal

DEFOGGERS

Defoggers Wiring Diagram for Hummer H3 2008

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List of elements for Defoggers Wiring Diagram for Hummer H3 2008:

A x1
A x2
A10
A24
A32
Body control module (bcm) (behind right front kick panel)
Defogger indicator
G105 (on left inner front wheelwell, behind battery)
G300 (under driver seat carpet, on floor board)
G350 (behind left rear quarter trim, near wheelwell)
Ground
Hot at all times
Hvac control module (beneath radio)
Ind ctrl
J251
J900
Logic
R/wdo defg fuse 30 20a
Rear defog indicator ctrl
Rear defog switch sig
Rear defogger switch
Rear window defogger
Relay cntrl
Rr defog relay 71
Sw sig
Tan
Underhood fuse block (above left front wheelwell)

ENGINE PERFORMANCE

3.7L VIN E

3.7L VIN E, Engine Performance Wiring Diagram (1 of 5) for Hummer H3 2008

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List of elements for 3.7L VIN E, Engine Performance Wiring Diagram (1 of 5) for Hummer H3 2008:

(behind right front kick panel) body control module (bcm)
(in chassis harness, approximately 22.5 cm (8.9 in) from fuel pump & sender assembly connector) j359
4wd low signal
5v ref 1
5v ref 2
A/c compressor clutch rly ctrl
Acc
Accelerator pedal position (app) sensor (on accelerator pedal bracket)
Accy volt
Air conditioning system
Air solenoid relay control
Anti-theft system
App sensor 1 signal
App sensor 2 signal
Battery positive voltage
Class 2 serial data
Cnstr vent fuse 31 10a
Computer data lines system
Cruise control release signal
Cruise control switch signal
Cruise control system
Engine control module (ecm) (right rear corner of engine compt)
Evap canister vent sol ctrl
Fuel level sensor signal
Fuel pump relay control
Fuel tank pressure (ftp) sensor (top of fuel pump & sender assembly)
Fuel tank pressure sensor signal
Hot at all times
Ignition switch
Ignition voltage
J201
Low ref
Low reference
Mil control
Off
Pnk
Powertrain relay control
Run
Sound systems
Start
Starter enable relay control
Starting/charging system
Stop fuse 54 15a
Stop lamp control
Stop lamp switch (above brake pedal assembly)
Tan
Transmissions system
Underhood fuse block (above left front wheelwell)
Vehicle speed signal

3.7L VIN E, Engine Performance Wiring Diagram (2 of 5) for Hummer H3 2008

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List of elements for 3.7L VIN E, Engine Performance Wiring Diagram (2 of 5) for Hummer H3 2008:

(on lower left side of engine block, forward of g102) g103
Air pump fuse 62 60a
Air sol fuse 44 15a
Air sol relay
Clstr fuse 10a
Computer data lines system
Engine oil ind
Etc fuse 15a
Evaporative emission (evap) canister vent solenoid valve (above spare tire)
Fuel pump & sender assembly (mounted on top of fuel tank)
Fuel pump relay
Fuel/pump fuse 3 15a
G103 (on lower left side of engine block, forward of g102)
G105 (on left inner front wheelwell, behind battery)
G420 (mounted to left side of rear cross member, near x420)
Hot at all times
Instrument panel cluster (ipc)
Logic
Mil ind
Nca
O2 snsr fuse 47 15a
Pcm-b fuse 25 10a
Pnk
Pwr/trn relay 81
Red
Secondary air injection (air) pump (w/ electric air injection reactor) (mounted to right front side of radiator support)
Secondary air injection (air) pump relay (top of engine, at rear of intake)
Secondary air injection (air) solenoid (w/ electric air injection reactor) (right side of engine, above exhaust)
Serial data
Underhood fuse block (above left front wheelwell)
Up shift ind

3.7L VIN E, Engine Performance Wiring Diagram (3 of 5) for Hummer H3 2008

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List of elements for 3.7L VIN E, Engine Performance Wiring Diagram (3 of 5) for Hummer H3 2008:

(attached to fuel rail) fuel injectors
(in center front of cam cover)
5v reference
5v reference 1
A pnk
Air conditioning system
Air relay control
Anti-lock brakes system
Clutch position sensor (m/t) (at top of clutch pedal assembly)
Computer data lines system
Delivered torque
Duty cycle signal
Engine control module (ecm) (right rear corner of engine compt)
Evap canister purge
Generator
Generator field
High speed gmlan
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
Ignition coil 5
J103 pnk (in engine compt harness, near grille lamps relay, by master cylinder)
Low reference
Nca
Pnk
Pnp/clutch
Regulator ctrl
Requested torque signal
Serial data bus +
Serial data bus -
Signal
Solenoid control
Spark plug
Start sw sig
Starting/charging system
Tan

3.7L VIN E, Engine Performance Wiring Diagram (4 of 5) for Hummer H3 2008

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List of elements for 3.7L VIN E, Engine Performance Wiring Diagram (4 of 5) for Hummer H3 2008:

(on lower left side of engine block, forward of g102) g103
(top of engine, mounted on upper air intake manifold) throttle body
A/c refrigerant
Air conditioning system
Air injection reaction ctrl valve ctrl
Air pump rly fuse 17 10a
Cpp sensor signal
Ect sensor signal
Eng cntrl sys fuse 22 15a
Engine control module (ecm) (right rear corner of engine compt)
Engine coolant temperature (ect) sensor (front left of engine)
Evaporative emission (evap) canister purge solenoid valve (below intake, in back of alternator)
Hot w/ run/crnk relay 78 energized
Ign 1 fuse 33 15a
Inj fuse 23 15a
Instrument cluster system
Manifold absolute pressure (map) sensor (at top right side rear of engine, on intake manifold)
Map sensor signal
Nca
Oil press sw sig
Pcm-i fuse 21 10a
Pnk
Press sens sig
Tan
Underhood fuse block (above left front wheelwell)
Vehicle speed sensor (vss) (m/t) (left rear of transfer case)
Vss high signal
Vss low signal

3.7L VIN E, Engine Performance Wiring Diagram (5 of 5) for Hummer H3 2008

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List of elements for 3.7L VIN E, Engine Performance Wiring Diagram (5 of 5) for Hummer H3 2008:

(on lower left side of engine block, rearward of g103) g102
5v ref 2
Camshaft position (cmp) actuator solenoid valve
Camshaft position (cmp) sensor
Ckp sensor signal
Cmp actuator solenoid
Cmp sensor sig
Crankshaft position (ckp) sensor (left rear of engine block, below starter)
Engine control module (ecm) (right rear corner of engine compt)
Fuel injector 1 control
Fuel injector 2 control
Fuel injector 3 control
Fuel injector 4 control
Fuel injector 5 control
Ground
Heated oxygen sensor (ho2s) 1 (on exhaust manifold on left side of engine)
Heated oxygen sensor (ho2s) 2 (in exhaust pipe, adjacent to transmission)
Ho2s heater high ctrl sens 1
Ho2s heater low ctrl sens 2
Ho2s high signal sensor 1
Ho2s high signal sensor 2
Ho2s low signal sensor 1
Ho2s low signal sensor 2
Iat sensor signal
Ic 1 control
Ic 2 control
Ic 3 control
Ic 4 control
Ic 5 control
Ignition voltage
Instrument cluster system
Knock sensor (ks) (below intake manifold, near front of engine)
Knock sensor signal
Low ref
Low reference
Maf sensor signal
Mass air flow (maf)/ intake air temperature (iat) sensor (between air cleaner & throttle body)
Nca
Pnk
Red
Tac motor control 1
Tac motor control 2
Tp sensor 1 signal
Tp sensor 2 signal
X3 underhood fuse block (above left x3 front wheelwell)

5.3L VIN L

5.3L VIN L, Engine Performance Wiring Diagram (1 of 5) for Hummer H3 2008

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List of elements for 5.3L VIN L, Engine Performance Wiring Diagram (1 of 5) for Hummer H3 2008:

(behind right front kick panel) body control module (bcm)
(in chassis harness, approximately 22.5 cm (8.9 in) from fuel pump & sender assembly connector) j359
4wd low signal
5v ref 1
5v ref 2
A/c compressor clutch rly ctrl
Acc
Accelerator pedal position (app) sensor (on accelerator pedal bracket)
Accy volt
Air conditioning system
Anti-theft system
App sensor 1 signal
App sensor 2 signal
Battery positive voltage
Class 2 serial data
Cnstr vent fuse 31 10a
Computer data lines system
Cruise control release signal
Cruise control switch signal
Cruise control system
Engine control module (ecm) (right rear corner of engine compt)
Evap canister vent sol ctrl
Evaporative emission (evap) canister vent solenoid valve (above spare tire)
Fuel level sensor signal
Fuel pump relay control
Fuel tank pressure (ftp) sensor (top of fuel pump & sender assembly)
Fuel tank pressure sensor signal
Hot at all times
Ignition switch
Ignition voltage
J201
Low ref
Low reference
Mil control
Off
Pnk
Powertrain relay control
Run
Sound systems
Start
Starter enable relay control
Starting/charging system
Stop fuse 54 15a
Stop lamp control
Stop lamp switch (above brake pedal assembly)
Tan
Transmissions system
Underhood fuse block (above left front wheelwell)
Vehicle speed signal

5.3L VIN L, Engine Performance Wiring Diagram (2 of 5) for Hummer H3 2008

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List of elements for 5.3L VIN L, Engine Performance Wiring Diagram (2 of 5) for Hummer H3 2008:

A/c refrigerant
Air conditioning system
Clstr fuse 10a
Computer data lines system
Ect sensor signal
Engine control module (ecm) (right rear corner of engine compt)
Engine coolant temperature (ect) sensor (front left of engine)
Engine oil ind
Etc fuse 15a
Fuel pump & sender assembly (mounted on top of fuel tank)
Fuel pump relay
Fuel/pump fuse 3 15a
G105 (on left inner front wheelwell, behind battery)
G420 (mounted to left side of rear cross member, near x420)
Hot at all times
Instrument cluster system
Instrument panel cluster (ipc)
Logic
Manifold absolute pressure (map) sensor (top of engine, above intake manifold)
Map sensor signal
Mil ind
Nca
O2 snsr fuse 47 15a
Oil press sw sig
Pcm-b fuse 25 10a
Pnk
Press sens sig
Pwr/trn relay 81
Serial data
Tan
Underhood fuse block (above left front wheelwell)

5.3L VIN L, Engine Performance Wiring Diagram (3 of 5) for Hummer H3 2008

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List of elements for 5.3L VIN L, Engine Performance Wiring Diagram (3 of 5) for Hummer H3 2008:

(top of cylinder head)
(upper right side of engine) fuel injectors
5v reference
5v reference 1
A pnk
Air conditioning system
Anti-lock brakes system
Bank 2 & sens 1
Bank 2 & sens 2
C red
Computer data lines system
D pnk
Delivered torque
Duty cycle signal
Engine control module (ecm) (right rear corner of engine compt)
Evap canister purge
Generator field
Heated oxygen sensor (ho2s) bank 2 & sensor 1 (left side exhaust, after catalytic converter)
Heated oxygen sensor (ho2s) bank 2 & sensor 2 (right side exhaust, after catalytic converter)
High speed gmlan
Ho2s heater low
Ignition coil 1
Ignition coil 3
Ignition coil 5
Ignition coil 7
J113
J114
J118
Low reference
Nca
Pnk
Pnp/clutch
Red
Regulator ctrl generator
Requested torque signal
Serial data bus +
Serial data bus -
Signal
Solenoid control
Spark plug
Start sw sig
Starting/ charging system
Tan

5.3L VIN L, Engine Performance Wiring Diagram (4 of 5) for Hummer H3 2008

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List of elements for 5.3L VIN L, Engine Performance Wiring Diagram (4 of 5) for Hummer H3 2008:

(on lower left side of engine block, forward of g102) g103
(top of cylinder head)
(top of engine, mounted on upper air intake manifold) throttle body
Eng cntrl sys fuse 22 15a
Evaporative emission (evap) canister purge solenoid valve (top of intake manifold near rear of throttle body)
Fuel injectors (upper left side of engine)
G103 (on lower left side of engine block, forward of g102)
Hot w/ run/crnk relay 78 energized
Ign 1 fuse 33 15a
Ignition coil 2
Ignition coil 4
Ignition coil 6
Ignition coil 8
Inj fuse 23 15a
J111
J116
J117
Nca
Pcm-i fuse 21 10a
Pnk
Pnk a
Pnk d
Red
Red c
Spark plug
Underhood fuse block (above left front wheelwell)

5.3L VIN L, Engine Performance Wiring Diagram (5 of 5) for Hummer H3 2008

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List of elements for 5.3L VIN L, Engine Performance Wiring Diagram (5 of 5) for Hummer H3 2008:

(on lower left side of engine block, rearward of g103) g102
5v ref 1
5v ref 2
Camshaft position (cmp) sensor (front of engine above crank pulley)
Ckp sensor signal
Cmp sensor signal
Crankshaft position (ckp) sensor (mounted to right rear of engine block behind starter motor)
Engine control module (ecm) (right rear corner of engine compt)
Engine)
Fuel injector 1 control
Fuel injector 2 control
Fuel injector 3 control
Fuel injector 4 control
Fuel injector 5 control
Fuel injector 6 control
Fuel injector 7 control
Fuel injector 8 control
Ground
Heated oxygen sensor (ho2s) bank 1 & sensor 1 (left side exhaust, before catalytic converter)
Heated oxygen sensor (ho2s) bank 1 & sensor 2 (right side exhaust, before catalytic converter)
Ho2s heater low bank 1 sens 1
Ho2s heater low bank 1 sens 2
Ho2s high sig bank 1 sens 1
Ho2s high sig bank 1 sens 2
Ho2s low sig bank 1 sens 1
Ho2s low sig bank 1 sens 2
Iat sensor signal
Ic 1 control
Ic 2 control
Ic 3 control
Ic 4 control
Ic 5 control
Ic 6 control
Ic 7 control
Ic 8 control
Ignition voltage
Instrument cluster system
Knock sensor (ks) 1 (lower left side of b
Knock sensor (ks) 2 (lower right side of engine)
Knock sensor 1 signal
Knock sensor 2 signal
Low reference
Maf sensor signal
Mass air flow (maf) sensor/intake air temperature (iat) sensor (between air cleaner & throttle body)
Oil pressure sensor signal
Pnk
Red
Tac motor control 1
Tac motor control 2
Tan
Tp sensor 1 signal
Tp sensor 2 signal
X3 underhood fuse block (above left x3 front wheelwell)

EXTERIOR LIGHTS

Backup Lamps Wiring Diagram for Hummer H3 2008

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List of elements for Backup Lamps Wiring Diagram for Hummer H3 2008:

A nca
A/t
Backup lamp switch (on top of transmission)
Bck/up fuse 28 15a
Bkup
Electronic brake control module (ebcm) (left of master cylinder)
G105 (on left inner front wheelwell, behind battery)
G340 (behind right rear quarter trim, near wheelwell)
G350 (behind left rear quarter trim, near wheelwell)
Harness into breakout to sunroof) j224
Hot at all times
Hot in run or start
Inside rearview mirror
J314
J315
Left backup lamp
Left tail/ stop & turn signal lamp
M/t
Nca
Park/neutral position (pnp) switch (left side of automatic transmission)
Right backup lamp
Right tail/ stop & turn signal lamp
Run/ crank relay 78
Underhood fuse block (above left front wheelwell)

Exterior Lamps Wiring Diagram (1 of 3) for Hummer H3 2008

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List of elements for Exterior Lamps Wiring Diagram (1 of 3) for Hummer H3 2008:

A10
A19
A24
A26
A28
A37
A45
A48
Auto
Body control module (bcm) (behind right front kick panel)
Bulb out
Center high mounted stop lamp (chmsl)
Dealer installed
Dimm sw sig
Frt trn/ hazrd/ctsy mir fuse 56 15a
Frt/prk fuse 43 10a
G105 (on left inner front wheelwell, behind battery)
G106 (on right inner front wheelwell)
G350 (behind left rear quarter trim, near wheelwell)
Haz sw sig
Hazard switch
Headlamp switch
Hot at all times
Interior lights system
J109
J185
J205
J900
Left
Left front marker lamp
Left front park/ turn signal lamp
Low ref
Lr prk lp
Off
Park
Prk lmp rly
Prk lmp sw
Prk/lp relay 89
Rap rly cntrl
Rear trn/ hazrd fuse 20 20a
Red
Right
Right front marker lamp
Right front park/ turn signal lamp
Stop fuse 54 15a
Stop lamp switch (above brake pedal assembly)
Stp lp volt
To lr prk fuse 37 (diagram 2 0f 3)
Trn sig sw
Turn signal/ multi-function switch
Turn switch
Underhood fuse block (above left front wheelwell)

Exterior Lamps Wiring Diagram (2 of 3) for Hummer H3 2008

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List of elements for Exterior Lamps Wiring Diagram (2 of 3) for Hummer H3 2008:

(approximately 18 cm (7 in) from breakout to x204) j305
Electronic brake control module (ebcm) (left of master cylinder)
Engine control module (ecm) (right rear corner of engine compt)
From a frt/prk fuse 43 (diagram 1 0f 3)
G105 (on left inner front wheelwell, behind battery)
G340 (behind right rear quarter trim, near wheelwell)
G350 (behind left rear quarter trim, near wheelwell)
G420 (mounted to left side of rear cross member, near x420)
Instrument panel cluster (ipc)
J309
J314
J315
Left tail/ stop & turn signal lamp
Left turn ind
License lamp
Logic
Lr prk fuse 37 10a
Red
Right tail/ stop & turn signal lamp
Right turn ind
Roof marker lamps (w/ roof mounted marker lamp)
Rr prk fuse 49 10a
Stp lmp volt
Trlr fuse 55 10a
Underhood fuse block (above left front wheelwell)
W/ trailer connector
W/o trailer connector

Exterior Lamps Wiring Diagram (3 of 3) for Hummer H3 2008

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List of elements for Exterior Lamps Wiring Diagram (3 of 3) for Hummer H3 2008:

(in dealer installed off road harness, under roof-mounted light bar near drivers side lamp connector) j302
(near left side grille lamp connector) j105
(under roof- mounted light bar near drivers side lamp connector) j301
Backup lamps circuit
E-brake fuse 83 30a
G105 (on left inner front wheelwell, behind battery)
G106 (on right inner front wheelwell)
G420 (mounted to left side of rear cross member, near x420)
Grille guard fuse 2 20a
Grille lamps relay (below side air inlet cover)
Hot at all times
J101
J102 (in dealer installed off road harness, 1.5 cm (5.9 in) from roof lamps relay, near master cylinder)
J103 (near grille lamps relay, by master cylinder)
J205
Lamp connector)
Left off road grille lamp
Left off road roof lamp
Off road grille lamp switch
Off road roof lamp switch
Off road roof lamps relay (below side air inlet cover)
Rap/accy relay 88
Red
Right off road grille lamp
Right off road roof lamp
Roof lp fuse 4 20a
Spo fuse 10 10a
Trailer connector (if equipped) (mounted on left side of trailer receiver, rear of vehicle)
Trlr b+ fuse 84 30a
Trlr bck/up fuse 42 10a
Underhood fuse block (above left front wheelwell)
W/ off road radiator grille guard lamp, dealer installed
W/ roof mounted off road lamp, dealer installed
W/ trailer connector
W/o trailer connector

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 3) for Hummer H3 2008

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List of elements for Ground Distribution Wiring Diagram (1 of 3) for Hummer H3 2008:

3.7l only, 5.7l information not available
87a
A/c clutch diode
A/c compressor clutch
A/t
Battery
Brake fluid level switch
Electronic brake control module (ebcm)
Engine control module (ecm)
Fog/lp relay 69
Fuel/pump relay 66
G100 (in engine compt, mounted to left front inner fender, behind battery)
G102 (on lower left side of engine block, rearward of g103)
G103 (on lower left side of engine block, forward of g102)
G104 (left side of engine block, in front of starter)
G105 (on left inner front wheelwell, behind battery)
G110 (left side of engine block, forward of g103)
G120 (on left lower inner wheelwell, near engine mount)
Generator battery control module
Hi/lo beam relay 70
Hi/low wpr relay 73
Horn assembly
If equipped
Ignition coil/ module 1
Ignition coil/ module 2
Ignition coil/ module 3
Ignition coil/ module 4
Ignition coil/ module 5
J110 (in body harness near ebcm, approximately 7.5 cm (3 in) back from ebcm)
J185 (in forward lamp harness, approximately 25 cm (9.8 in) from x115)
Left front fog lamp
Left front marker lamp
Left park/turn signal lamp
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
On/off wpr relay 72
Park/ neutral position (pnp) switch
Right front fog lamp
Right front marker lamp
Right park/turn signal lamp
Rr defog relay 71
Run/ crank relay 78
Secondary air injection (air) pump
Secondary air injection (air) pump solenoid
Sunroof motor
Sunroof switch
Transmission control module (tcm)
Underhood fuse block (above left front wheel- well)
Underhood fuse block (above left front wheelwell)
W/ electric air injection reactor
Wind- shield wiper motor

Ground Distribution Wiring Diagram (2 of 3) for Hummer H3 2008

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List of elements for Ground Distribution Wiring Diagram (2 of 3) for Hummer H3 2008:

Automatic transmission shift lever
Center high mounted stop lamp (chmsl)
Driver back heated seat element
Driver door lock/ window switch
Driver seat adjuster switch
Driver seat lumbar adjuster switch
Fuel pump & sender assembly
G340 (behind right rear quarter trim, near wheelwell)
G345 (convenience package decor level 3) (behind left rear quarter trim, near wheelwell)
G350 (behind left rear quarter trim, near wheelwell)
G420 (mounted to left side of rear cross member, near x420)
J306 (in driver seat harness in breakout to lumbar adjuster/heater switch)
J314 (in body harness, approximately 44.5 cm (17.5 in) rearward of breakout to left seat belt pretensioner)
J316 (in passenger seat harness, approximately 5 cm (2 in) before breakout to seat adjuster & lumbar adjuster/heater switches)
J317 (in passenger seat heater element jumper harness)
J318 (in passenger seat heater element jumper harness)
J514 (in driver door harness, approximately 6.5 cm (2.6 in) before breakouts to door lock & window switch)
J900 (in endgate harness, approximately 19.5 cm (7.7 in) rearward of endgate grommet)
Left back-up lamp
Left rear window switch
Left tail/ stop & turn signal lamp
License lamp
Nca
Outside rearview mirror switch
Passenger back heated seat element
Passenger cushion heated seat element
Passenger door lock/ window switch
Passenger heated seat control module
Passenger seat adjuster switch
Passenger seat lumbar adjuster switch
Rear accessory power outlet
Rear window defogger
Rear window wiper motor
Right back-up lamp
Right rear window switch
Right tail/ stop & turn signal lamp
Trailer connector
W/ hd truck trailer wiring
W/o hd truck trailer wiring

Ground Distribution Wiring Diagram (3 of 3) for Hummer H3 2008

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List of elements for Ground Distribution Wiring Diagram (3 of 3) for Hummer H3 2008:

(if equipped) inflatable restraint vehicle rollover sensor
(if equipped) rear view camera image display module
A12
Accessory switch
Audio amplifier
B10
Body control module (bcm)
Breakout to left footwell lamp)
Convenience package decor level 3
Data link connector (dlc)
Digital radio receiver
Dome/ reading lamps
Driver door jamb switch
Driver seat belt switch
Except convenience package decor level 3
G106 (on right inner front wheelwell)
G300 (under driver seat carpet, on floor board)
G310 (mounted under left side of passenger seat)
G320 (under rear of middle console carpet, on floor board)
Garage door opener (gdo)
Hazard switch
Headlamp dimmer switch
High speed blower motor relay
Hvac control module
I/p accessory power outlet 1
I/p accessory power outlet 2
Ignition lock cylinder control actuator
Inflatable restraint front passenger presence system (pps) module
Inflatable restraint sensing & diagnostic module (sdm)
Inside rearview mirror
Instrument panel cluster (ipc)
J206 (in i/p harness, approximately 7 cm (2.8 in) right of breakout to right footwell lamp)
J300 (in body harness, approximately 20 cm (7.9 in) forward of left rocker channel cover)
J320 (in body harness rear seat area along sill, approximately 20 cm (7.9 in) rearward of breakout to g320)
J340 (in dome lamp jumper harness, approximately 10 cm (3.9 in) before breakout to right sunshade)
Left rear door jamb switch
Left sunshade
Liftgate ajar switch
Passenger door jamb switch
Passenger seat belt switch
Pnk
Radio
Rear window wiper/washer switch
Right rear door jamb switch
Right sunshade
Steering wheel position sensor
Theft deterrent module (tdm)
Transfer case shift control module
Turn signal/ multifunction switch
Vehicle communication interface module (vcim)
W/ active brake control
Windshield washer fluid pump
Yaw & lateral accelerometer sensor

HEADLIGHTS

Headlights Wiring Diagram for Hummer H3 2008

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List of elements for Headlights Wiring Diagram for Hummer H3 2008:

(in forward lamp harness, near center point of top of radiator, approximately 58 cm (22.8 in) from x115)
(in forward lamp harness, near left upper radiator support, approximately 48.5 cm (19.1 in) from x115)
87a
A10
A18
A31
A36
A37
A39
A43
Ambient light sensor (right side of dash upper trim panel)
Ambient lt sens
Auto
Body control module (bcm) (behind right front kick panel)
Class 2 data
Class 2 ser data
Class 2 serial data
Drl fuse 39 10a
Drl ind logic
Drl relay
Drl rly ctrl
Flash to pass
Fog lmp ind
Fog lp rly ctrl
Fog lp sw sig
Fog/lp fuse 24 15a
Fog/lp relay
Front fog lamp ind
Front fog lamp switch
G105 (on left inner front wheelwell, behind battery)
G106 (on right inner front wheelwell)
Hdlp dim sw sig
Hdlp off sig
Hdlp on sig
Hdlp relay
Hdlp rly ctrl
Head on
Headlamp dimmer switch
Headlamp switch
Hi bm rly ctrl
Hi/lo beam relay 70
High beam
High beam ind
Hot at all times
Ign
Instrument panel cluster
J112
J120
J134
J145
J185
J205
Left front fog lamp
Left head- lamp
Lh hdlp fuse 41 10a
Low ref
Off
Park
Park brake switch (left lower side of dash)
Pk brake sw sig
Pnk
Red
Rh hdlp fuse 40 10a
Right front fog lamp
Right head- lamp
Turn signal/ multi-function switch
Underhood fuse block (above left front wheelwell)

HORN

Horn Wiring Diagram for Hummer H3 2008

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List of elements for Horn Wiring Diagram for Hummer H3 2008:

A25
A40
Body control module (behind right front kick panel)
G105 (on left inner front wheelwell, behind battery)
Horn (front of vehicle, behind grill)
Horn contact in
Horn fuse 36 10a
Horn relay 74
Horn rly cntrl
Horn switch
Hot at all times
J185
Nca
Turn signal cancel cam
Turn signal/ multi-function switch
Underhood fuse block (above left front wheelwell)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram for Hummer H3 2008

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List of elements for Instrument Cluster Wiring Diagram for Hummer H3 2008:

(right rear corner of engine compt) engine control module (ecm)
(under driver seat carpet, on floor board) g300
3.7l
5 volt ref 1
5.3l
A nca
A19
A26
A31
A38
A39
A41
A42
A44
A47
Abs ind
Accessory switch
Air bag ind
B nca
Battery
Body control module (bcm) (behind right front kick panel)
Brake fluid level switch (on left side of brake fluid reservoir)
Brake ind
Brk fluid lvl
C nca
Charging ind
Chime
Clstr fuse 19 10a
Computer data lines system
Cruise ind
Driver information center (dic)
Driver seat belt buckle
Driver seat belt switch
Ect sense
Electronic brake control module (ebcm) (left of master cylinder)
Engine controls system
Engine coolant
Engine coolant temper- ature gauge
Engine oil pressure (eop) sensor (5.3l) (top of engine near rear of intake manifold)
Engine oil pressure (eop) switch (3.7l) (above oil filter)
Fuel gauge
Fuel level
Fuel pump & sender assembly (mounted on top of fuel tank)
G105 (on left inner front wheelwell, behind battery)
G106 (on right inner front wheelwell)
G310 (mounted under left side of passenger seat)
Ground
High beam ind
Hot at all times
Ign
Illumination (4 bulbs)
Inflatable restraint sensing & diagnostic module (sdm) (beneath lower console)
Instrument panel cluster (ipc)
J110
J205
J251
J310
J358
Left turn ind
Logic
Low ref
Low tire pressure ind
Lr turn lamp
Malfunction ind
Mil
Nca
Oil gauge
Oil press
Oil pressure ind
Park brake switch (left lower side of dash)
Passenger seat belt buckle
Passenger seat belt ind
Passenger seat belt switch
Pnk
Prk brk sw
Red
Right turn ind
Rr turn lamp
Seat belt ind
Seat belt sw
Security ind
Sensor sig
Serial data
Speedo- meter
Tacho- meter
Tan
Temperature (ect) sensor (front left of engine)
Traction control ind
Trip/ odometer
Trip/ reset switch
Underhood fuse block (above left front wheelwell)
Up shift ind
Volts

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Hummer H3 2008

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List of elements for Courtesy Lamps Wiring Diagram for Hummer H3 2008:

A10
A11
A12
A24
A30
A32
A38
A39
A40
A41
A44
A46
A47
Approximately 5 cm (2 in) before breakout to dome/ reading lamp) j350
Battery
Bcm fuse 14 10a
Body control module (bcm) (behind right front kick panel)
Dome lamp
Dome on switch
Dome override switch
Dome/ reading lamps
Driver door ajar switch (in lower left "b" pillar)
Driver door lock/ window switch x1
Endgate ajar switch (in right "d" pillar)
Fr/prk fuse 43 10a
Frt turn/ hazard/ ctsy mir fuse 56 15a
G106 (on right inner front wheelwell)
G300 (under driver seat carpet, on floor board)
G320 (under rear of middle console carpet, on floor board)
G340 (behind right rear quarter trim, near wheelwell)
G350 (behind left rear quarter trim, near wheelwell)
Headlamp switch
Hot at all times
J209
J300
J315
J320
J330 (in dome lamp jumper harness, approximately 5 cm (2 in) before breakout to right sunshade) b
J340
J347 (in body harness, approximately 42 cm (16.5 in) rearward of breakout to right seat belt pretensioner)
J514
Lamp ctrl
Lamp sw sig
Left i/p courtesy lamp
Left rear door ajar switch (in lower left "c" pillar)
Left sunshade (w/ convenience package decor level 3)
Left vanity mirror lamp
Lf door ajar
Low ctrl
Low ref
Lr door ajar
Override sw
Passenger door ajar switch (in lower right "b" pillar)
Passenger door lock/ window switch
Pk lp ctrl
Power ctrl
Prk/lp relay
Rf door ajar
Right i/p courtesy lamp
Right rear door ajar switch (in lower right "c" pillar)
Right sunshade (w/ convenience package decor level 3)
Right vanity mirror
Rr door ajar
Underhood fuse block (above left front wheelwell)
W/ convenience package decor level 3
W/o convenience package decor level 3

Instrument Illumination Wiring Diagram for Hummer H3 2008

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List of elements for Instrument Illumination Wiring Diagram for Hummer H3 2008:

(5 bulbs)
(not used)
A10
A24
A27
A28
A29
A30
A33
A34
A36
A48
Accessory switch
Auto
Back lighting
Battery
Bcm fuse 14 10a
Body control module (bcm) (behind right front kick panel)
Dim control
Dim sw sig
Driver door lock/ window switch x1
Frt/prk fuse 43 10a
G105 (on left inner front wheelwell, behind battery)
G106 (on right inner front wheelwell)
G340 (behind right rear quarter trim, near wheelwell)
G350 (behind left rear quarter trim, near wheelwell)
Hazard switch
Head
Headlamp switch
Hot at all times
Hvac module (beneath radio)
Instrument panel lamps dimming control
J205
J209
J210
J315
J514
Low ref
Lr prk fuse 37 10a
Off
Park
Passenger door lock/ window switch
Pk lp ctrl
Prk/lp relay
Radio
Rear window wiper/washer switch
Sunroof switch
Sw sig
Underhood fuse block (above left front wheelwell)
W/ sunroof
W/o sunroof
X204

NAVIGATION

Navigation Wiring Diagram for Hummer H3 2008

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List of elements for Navigation Wiring Diagram for Hummer H3 2008:

Backup lp sig
Bare
Camera ctrl
Camera gnd
Camera sig
Camera sig +
Camera sig -
Camera video
Drain wire
Exterior lights system
G300 (under driver seat carpet, on floor board)
Ground
Hot w/ run/crank relay energized
Ign voltage
Image display module
Inside rearview mirror (isrvm)
J251
Pnk
Rearview camera
Spare 6 fuse 18 10a
Underhood fuse block (above left front wheelwell)

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for Hummer H3 2008

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List of elements for Power Distribution Wiring Diagram (1 of 4) for Hummer H3 2008:

(above left front wheelwell) underhood fuse block
(approximately 2 cm (0.8 in) before breakout to x125)
(approximately 24.5 cm (9.6 in) rearward of body pass through in breakout to left door) j264
(behind right rear quarter trim, near wheelwell) g340
(not used)
(on right inner front wheel- well) g106
(on right inner front wheelwell) g106
Abs/vses1 -mtr fuse 67 40a
Abs/vses2 -sol fuse 64 30a
Amp fuse 38 25a
Audio amplifier
Automatic transmission shift control
Aux pwr 1 fuse 51 20a
Aux pwr 2 fuse 45 20a
Battery
Bcm fuse 10a
Body control module
Body control module (bcm)
Clstr fuse 19 10a
Cnstr vent fuse 31 10a
Data link connector (dlc)
Diode
Driver door lock/ window switch
Driver heated seat cushion element
E-brake fuse 83 30a
Electronic brake control module (ebcm)
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From b aux pwr 1 fuse 51 (diagram 1 of 4)
From c rear trn/ hazrd fuse 20 (diagram 1 of 4)
Frt trn/ hazrd/ ctsy mir fuse 56 15a
Generator
Htd/seats fuse 1 20a
Hvac control module
I/p auxiliary power outlet
Instrument panel cluster (ipc)
J143
J205
J319 (in passenger seat heater element jumper harness)
Left rear window switch
Lt pwr wndw fuse 68 30a
Megafuse fuse 91 125a
Nca
Passenger door lock/ window switch
Passenger heated seat module
Pcm cntrl relay
Pcm-b fuse 25 10a
Pwr s/roof fuse 57 30a
Pwr/ lks fuse 8 20a
Radio
Rap/ accy relay
Rdo fuse 13 10a
Rear auxiliary power outlet
Rear trn/hazrd fuse 20 20a
Rear window washer fluid pump
Rear window wiper module
Rear window wiper/ washer switch
Rear wpr switch/pump fuse 16 15a
Rear/wpr mtr fuse 15 15a
Red
Right rear window switch
Rt pwr wndw fuse 63 30a
S/roof frt/wpr fuse 9 15a
Sdars fuse 50 10a
Spo fuse 10 10a
Starter
Stop fuse 54 15a
Stop lamp switch
Strtr fuse 30a
Sunroof module
Sunroof motor
Tccm fuse 12 30a
To onstar fuse (diagram 4 of 4)
To pwr/ lock fuse 8 (diagram 1 of 4)
To pwr/trn relay 81 (diagram 2 of 4)
To rap/accy relay 88 (diagram 1 of 4)
Trailer connector
Transfer case shift control module
Trlr b+ fuse 84 30a
Turn signal/multi- function switch
Underhood fuse block (above left front wheelwell)
W/ electric sun, glass & sliding roof
W/ hd truck trailer wiring harness
W/ premium audio branded & amplifier speaker system
Windshield wiper/washer switch

Power Distribution Wiring Diagram (2 of 4) for Hummer H3 2008

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List of elements for Power Distribution Wiring Diagram (2 of 4) for Hummer H3 2008:

(in driver seat harness, approximately 28.5 cm (11.2 in) back from x307) j312
(in passenger seat harness, approximately 10 cm (3.9 in) before breakout to seat adjuster & lumbar adjuster/heater switches) j341
1-2 shift solenoid (ss) valve
2-3 shift solenoid (ss) valve
3-2 shift solenoid (ss) valve
A/t
Accessory switch
Air bag fuse 27 10a
Air pump fuse 62 60a
Air pump rly fuse 60a
Cruise control release switch
Cruise/misc fuse 35 10a
Driver seat adjuster switch
Drl fuse 39 10a
Drl relay
Fog/lp relay
From fuel/ e pump relay 66 (diagram 2 of 4)
From rap/ d accy relay 88 (diagram 1 of 4)
Frt/wiper fuse 25a
Fuel/ pump relay
G105 (on left inner front wheelwell, behind battery)
Generator battery control module
Hdlp relay
Horn relay
If equipped
Inflatable restraint front passenger presence system (pps) sensor
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint vehicle rollover sensor
Inside rearview mirror
J133
On/off wiper relay
Passenger seat adjuster switch
Passenger seat lumbar adjuster switch
Pnk
Power seat fuse holder
Pwr seats fuse 61 40a
Pwr/trn relay
Rearview camera image display module
Red
Run/ crank relay
Rvc pwr fuse 7 10a
Rvc vsense+ fuse 32 10a
Seat circuit breaker 25a
Secondary air injection (air) pump relay
Spare 6 fuse 18 10a
To air cmprsr fuse 11 (diagram 3 of 4)
To bck/up fuse 28 (diagram 3 of 4)
To body control module (diagram 4 of 4)
To run/ crank relay 78 (diagram 2 of 4)
Torque converter clutch (tcc) solenoid valve
Torque converter clutch pulse width modulation (tcc pwm) solenoid valve
Trans fuse 34 10a
Transmission control module (tcm)
Turn signal/ multi-function switch
Underhood fuse block (above left front wheelwell)
W/ air injection electric reactor system

Power Distribution Wiring Diagram (3 of 4) for Hummer H3 2008

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List of elements for Power Distribution Wiring Diagram (3 of 4) for Hummer H3 2008:

(above left front wheelwell) underhood fuse block
(approximately 15 cm (6 in) from x203) j220
(approximately 5 cm (0.2 in) before breakout to ebcm) j141
(in dealer installed off road harness, 1.5 cm (5.9 in) from roof lamps relay, near master cylinder) j101
(in engine compartment harness, near grille lamps relay, by master cylinder) j103
(not used)
3.7l
5.3l
A/c clutch diode 90
A/c clutch fuse 48 10a
A/c clutch relay
A/c compressor clutch
A/t
A26
Abs/vses fuse 29 10a
Accessory switch
Air cmprsr fuse 11 25a
Air sol fuse 44 15a
Air sol relay
Back-up lamp switch
Bck/up fuse 28 15a
Blower motor
Body control module (bcm)
Driver seat lumbar adjuster switch
Electronic brake control module (ebcm)
Eng cntrl sys fuse 22 15a
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
From i ign1 fuse 33 (diagram 3 of 4)
From injector fuse 23 (diagram 3 of 4)
From run/ crank relay 78 (diagram 2 of 4)
From trans f fuse 34 (diagram 2 of 4)
Fuel injector
Grille guard fuse 2 20a
High speed blower motor relay
Hvac blwr fuse 82 30a
Hvac cntrl hd fuse 59 10a
Hvac control module
Hvac relay
Ign1 fuse 33 15a
Ignition coil/ module
Inj fuse 23 15a
J111
J113
J116
J118
M/t
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
Off road grill lamp relay (dealer installed)
Off road roof lamp relay (dealer installed)
Park/ neutral position (pnp) switch
Passenger seat lumbar adjuster switch
Pcm i fuse 21 10a
Pnk
Pwr htr switch fuse 53 10a
Red
Roof lp fuse 4 20a
Rr defog relay
Steering wheel position sensor
Tccm switch fuse 58 10a
To a/c clutch relay 76 (diagram 3 of 4)
To batt ign sw fuse 5 (diagram 4 of 4)
To eng cntrl sys fuse 22 (diagram 3 of 4)
Underhood fuse block (above left front wheelwell)
Vses/ abs fuse 52 10a
W/ active brake control
Yaw & lateral accelerometer sensor

Power Distribution Wiring Diagram (4 of 4) for Hummer H3 2008

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List of elements for Power Distribution Wiring Diagram (4 of 4) for Hummer H3 2008:

(in body harness under left door sill plate, approximately 41 cm (16.1 in) rearward of body pass through in main bundle) j309
(in body harness, approximately 6 cm (2.4 in) to right of stop lamp switch breakout in main harness) j209
(in forward lamp harness, approximately 43 cm (17 in) from x115) j109
10a
5-volts reference
A14
A48
Acc
Accessory voltage
Batt ign switch fuse 5 10a
Body control module (bcm)
Body control module (bcm) (behind right front kick panel)
Digital radio receiver
Driver door lock/ window switch
Engine control module (ecm)
From battery a (diagram 1 of 4)
From rr k defog relay 71 (diagram 3 of 4)
From run/crank relay 78 (diagram 2 of 4)
Frt/prk fuse 43 10a
Ign
Ignition switch
J106
J200
J201
J234 (in i/p harness center dash area, approximately 5 cm (2 in) left of breakouts to hvac in main bundle)
Left front marker lamp
Left park/turn signal lamp
Left rear window switch
Left roof marker lamp
Left tail/stop & turn signal lamp
Lh prk fuse 37 10a
License lamp
Off
Onstar fuse
Passenger door lock/ window switch
Prk/ lp relay
Red
Right front marker lamp
Right park/turn signal lamp
Right rear window switch
Right tail/stop & turn signal lamp
Rr prk fuse 49 10a
Run
Run/ crank voltage
Start
Theft deterrent module (tdm)
Trailer connector
Trlr fuse 55 10a
Underhood fuse block (above left front wheelwell)
Vehicle communication interface module (vcim)
W/ digital audio
W/ roof mounted marker lamp
X1 b7
X2 a42

POWER DOOR LOCKS

Power Door Locks Wiring Diagram for Hummer H3 2008

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List of elements for Power Door Locks Wiring Diagram for Hummer H3 2008:

(in body harness, approximately 3 cm (1.2 in) to left of park brake switch breakout)
(in body harness, approximately 3 cm (1.2 in) to right of park brake switch breakout) j295
(not used)
A11
A12
A38
A39
A41
A42
A44
A47
All doors lock ctrl
All doors unlock ctrl
Battery +
Bcm fuse 14 10a
Body control module (bcm) (behind right front kick panel)
Class 2 serial data
Computer data lines system
Door unlock
Door unlock ctrl
Driver door lock actuator (in center rear of driver door, near door latch)
Driver door lock/ window switch
Driver door unlock ctrl
Driver unlock relay
Frt turn/ hazrd/ctsy mir fuse 56 15a
G320 (under rear of middle console carpet, on floor board)
G340 (behind right rear quarter trim, near wheelwell)
G350 (behind left rear quarter trim, near wheelwell)
Ground
Hot at all times
J244 (in body harness behind passenger side dash area, approximately 25 cm (9.8 in) before breakout to right front door)
J294
J315
J320
J514
J529 (in driver door harness, approximately 7.5 cm (3 in) before breakout to power window motor)
Left rear door lock actuator (in center rear of left rear door, near door latch)
Liftgate door lock actuator (on right side of liftgate)
Lock
Lock relay
Lock sw
Logic
Pass door lock ctrl
Passenger door lock actuator (in center rear of passenger door, near door latch)
Passenger door lock/ window switch
Pwr/ lks fuse 8 20a
Rear trn/ hazrd fuse 20 20a
Right rear door lock actuator (in center rear of right rear door, near door latch)
Tan
Underhood fuse block (above left front wheelwell)
Unlock
Unlock ctrl
Unlock relay

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for Hummer H3 2008

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List of elements for Electrochromic Mirror Wiring Diagram for Hummer H3 2008:

(under driver seat carpet, on floor board) g300
Ambient air temp sensor
Ambient air temperature sensor (attached to front center of radiator support)
Bare
Camera signal +
Camera signal -
Cruise/ misc fuse 35 10a
Drain wire
Emergency switch
Exterior lights system
G105 (on left inner front wheelwell, behind battery)
Green led
Hot at all times
Hot in run or start
Ign
Inside rearview mirror
J300
Keypad
Keypad ctrl
Keypad green led sig
Keypad red led sig
Logic
Low ref
Navigation system
Onstar button assembly
Onstar switch
Phone switch
Pnk
Red led
Run/ crnk relay 78
Underhood fuse block (above left front wheelwell)
Vehicle communication interface module (vcim) (center of dash below hvac control head)
X1 sig

Power Mirrors Wiring Diagram for Hummer H3 2008

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List of elements for Power Mirrors Wiring Diagram for Hummer H3 2008:

A29
Body control module (behind right front kick panel)
Driver outside rearview mirror
Frt trn/hazrd ctsy mir fuse 56 15a
G350 (behind left rear quarter trim, near wheelwell)
Horz
Hot at all times
J514
J590 (in driver door harness, approximately 7.5 cm (3 in) before breakout to osrvm)
Left
Nca
Off
Outside rearview mirror switch
Passenger outside rearview mirror
Right
Underhood fuse block (above left front wheelwell)
Vert

POWER SEATS

Driver Heated Seat Wiring Diagram for Hummer H3 2008

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List of elements for Driver Heated Seat Wiring Diagram for Hummer H3 2008:

A26
Body control module (bcm) (behind right front kick panel)
Driver back heated seat element (in driver seat back)
Driver cushion heated seat element (in driver seat bottom)
Driver heated seat module (in driver seat bottom)
Driver seat lumbar adjuster switch
G345 (behind left rear quarter trim, near wheelwell)
High
High/low status ind bulb
Hot at all times
Htd/seats fuse 1 20a
Hvac relay
Ign 3 rly coil
J306
Low
Nca
Passenger heated seat circuit
Pnk
Pwr htr switch fuse 53 10a
Red
Underhood fuse block (above left front wheel well)

Driver Power Seat Wiring Diagram for Hummer H3 2008

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List of elements for Driver Power Seat Wiring Diagram for Hummer H3 2008:

25a
Back
Driver seat adjuster motor assembly (under driver seat)
Driver seat adjuster switch
Front vertical
Fuse holder power seat
Fwd
G345 (behind left rear quarter trim, near wheelwell)
Horiz- ontal
Hot at all times
J306
J312
Lumbar circuit
Nca
Pwr seats fuse 61 40a
Rear vertical
Seat circuit breaker
Tan
Underhood fuse block (above left front wheel well)

Lumbar Wiring Diagram for Hummer H3 2008

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List of elements for Lumbar Wiring Diagram for Hummer H3 2008:

25a
Driver power seat circuit
Driver seat lumbar adjuster switch
Driver seat lumbar motor (in driver seat)
Fuse holder power seat
G345 (behind left rear quarter trim, near wheelwell)
Hot at all times
J306
J312
J316
J341
Nca
Out
Passenger power seat circuit
Passenger seat lumbar adjuster switch
Passenger seat lumbar motor (in passenger seat)
Pnk
Pwr seats fuse 61 40a
Seat circuit breaker
Underhood fuse block (above left front wheel well)

Passenger Power Seat Wiring Diagram for Hummer H3 2008

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List of elements for Passenger Power Seat Wiring Diagram for Hummer H3 2008:

25a
Front vertical
Fuse holder power seat
Fwd
G345 (behind left rear quarter trim, near wheelwell)
Horiz- ontal
Hot at all times
J312
J316
J341
Lumbar circuit
Passenger seat adjuster motor assembly (under passenger seat)
Passenger seat adjuster switch
Pwr seats fuse 61 40a
Rear vertical
Rwd
Seat circuit breaker
Tan
Underhood fuse block (above left front wheel well)

Passenger"s Heated Seat Wiring Diagram for Hummer H3 2008

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List of elements for Passenger"s Heated Seat Wiring Diagram for Hummer H3 2008:

(not used)
A26
Body control module (behind right front kick panel)
C nca
D nca
Dr htd seat sw off sig
Driver heated seats circuit
G345 (behind left rear quarter trim, near wheelwell)
High
High/low status ind bulb
Hot at all times
Htd/seats fuse 1 20a
Hvac relay
Ign
Ign 3 rly coil
J316
J318
Logic
Low
Nca
Passenger back heated seat element (in passenger seat back)
Passenger cushion heated seat element (in passenger seat bottom)
Passenger heated seat module (in passenger seat bottom)
Passenger seat belt buckle
Passenger seat lumbar adjuster switch
Pnk
Pwr htr switch fuse 53 10a
Red
Underhood fuse block (above left front wheel well)

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram for Hummer H3 2008

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List of elements for Power Top/Sunroof Wiring Diagram for Hummer H3 2008:

Body control module (bcm) (behind right front kick panel)
Closed
G105 (on left inner front wheelwell, behind battery)
Ground
Hot at all times
Ign volt
Interior lights system
J143
J210
Logic
Motor
Open
Pwr s/roof fuse 57 30a
Rap rly
Rap/accy relay
S/roof frt/wpr fuse 9 10a
Sunroof actuator m
Sunroof motor (at front of sunroof module)
Sunroof switch
Sw closed
Sw open
Underhood fuse block (above left front wheelwell)

POWER WINDOWS

Power Windows Wiring Diagram for Hummer H3 2008

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List of elements for Power Windows Wiring Diagram for Hummer H3 2008:

(in body harness, approximately 11 cm (4.3 in) to right of stop lamp switch breakout in main harness) j213
Down
Down relay
Driver door lock/window switch
Driver window motor (attached to interior of left front door)
G340 (behind right rear quarter trim, near wheelwell)
G350 (behind left rear quarter trim, near wheelwell)
Hot w/ rap/accy relay 88 energized
Interior lights system
J247
J264
J314
J315
J514
Left rear window motor (attached to interior of left rear door)
Left rear window switch
Logic
Lr down
Lr up
Lt pwr window fuse 68 30a
Passenger door lock/window switch
Passenger window motor (attached to interior of right front door)
Rf down
Rf up
Right rear window motor (attached to interior of right rear door)
Right rear window switch
Rr down
Rr up
Rt pwr window fuse 63 30a
Tan
Underhood fuse block (above left front wheelwell)
Up relay
W/l

RADIO

Base Radio Wiring Diagram for Hummer H3 2008

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List of elements for Base Radio Wiring Diagram for Hummer H3 2008:

A10
A11
A12
Audio comm sig
B10
B11
B12
Bare
Coax
Common sig
Computer data lines system
Drain wire
G106 (on right inner front wheelwell)
G300 (under driver seat carpet, on floor board)
Ground
Hot at all times
Instrument cluster system
J205
J214
J251
Left aud sig
Left audio sig
Left front speaker
Left front tweeter speaker
Left rear speaker
Lf out +
Lf out -
Lr out +
Lr out -
Radio
Radio antenna
Rdo fuse 13 10a
Rf out +
Rf out -
Right aud sig
Right front speaker
Right front tweeter speaker
Rr out +
Rr out -
Satellite radio circuit
Serial data
Tan
Underhood fuse block (above left front wheelwell)
Vehicle communication interface module (vcim) (center of dash below hvac control head)
Vss

Premium Radio Wiring Diagram (1 of 2) for Hummer H3 2008

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List of elements for Premium Radio Wiring Diagram (1 of 2) for Hummer H3 2008:

A10
A11
A12
Audio comm sig
B10
B11
B12
Bare
Coax
Common sig
Computer data lines system
Drain wire
G106 (on right inner front wheelwell)
G300 (under driver seat carpet, on floor board)
Ground
Hot at all times
Instrument cluster system
J205
J214
J251
Left aud sig
Left audio sig
Lf out +
Lf out -
Lr out +
Lr out -
Pnk
Radio
Radio antenna
Radio mute
Radio on sig
Rdo fuse 13 10a
Rf out +
Rf out -
Right aud sig
Rr out +
Rr out -
Satellite radio circuit
Serial data
Tan
Underhood fuse block (above left front wheelwell)
Vehicle communication interface module (vcim) (center of dash below hvac control head)
Vss

Premium Radio Wiring Diagram (2 of 2) for Hummer H3 2008

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List of elements for Premium Radio Wiring Diagram (2 of 2) for Hummer H3 2008:

Amp fuse 38 25a
Audio amplifier (mounted next to subwoofer)
G300 (under driver seat carpet, on floor board)
Ground
Hot at all times
J300
L spk out +
L spk out -
Left front speaker
Left front tweeter speaker
Left rear speaker
Left subwoofer
Lf aud sig +
Lf aud sig -
Lf spkr out +
Lf spkr out -
Lr aud sig +
Lr aud sig -
Lr spkr out +
Lr spkr out -
Nca
Pnk
R spk out +
R spk out -
Radio mute sig
Radio on sig
Rf aud sig +
Rf aud sig -
Rf spkr out +
Rf spkr out -
Right front speaker
Right front tweeter speaker
Right rear speaker
Right subwoofer
Rr aud sig +
Rr aud sig -
Rr spkr out +
Rr spkr out -
Subwoofer speaker
Tan
Underhood fuse block (above left front wheelwell)

Satellite Radio Wiring Diagram for Hummer H3 2008

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List of elements for Satellite Radio Wiring Diagram for Hummer H3 2008:

10a
Antenna sig
Aud common
Audio common
Bare
Battery
Cellular, navigation & digital radio antenna (mounted to right front roof area)
Coax
Digital radio receiver (right side of dash)
Drain wire
G300 (under driver seat carpet, on floor board)
Ground
Hot at all times
J234
J251
Lt aud sig
Lt aud sig+
Onstar fuse
Radio
Rt aud sig
Rt aud sig+
Serial data

SHIFT INTERLOCK

Ignition Lock Solenoid Wiring Diagram for Hummer H3 2008

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List of elements for Ignition Lock Solenoid Wiring Diagram for Hummer H3 2008:

Automatic transmission shift lever
Body control module (bcm) (behind right front kick panel)
G106 (on right inner front wheelwell)
Hot at all times
Ignition lock cylinder control actuator (on upper right side of steering column)
J143
J205
Park position switch (closed in park)
Rap relay
Rap/accy relay 88
S/roof frt/wpr fuse 9 15a
Underhood fuse block (above left front wheelwell)

Shift Interlock Wiring Diagram for Hummer H3 2008

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List of elements for Shift Interlock Wiring Diagram for Hummer H3 2008:

(in body harness, approximately 14 cm (5.5 in) to right of stop lamp switch breakout in main harness)
A31 x2
A37
A47 x1
Automatic transmission shift lever
Automatic transmission shift lock control solenoid
B+ voltage
Bcm fuse 14 10a
Body control module (bcm) (behind right front kick panel)
Class 2 serial data
Computer data lines system
Engine control module (ecm) (right rear corner of engine compt)
Exterior lights system
G350 (behind left rear quarter trim, near wheelwell)
Hot at all times
J215
J314
Shift sol ctrl
Stop fuse 54 15a
Stop lamp control
Stop lamp switch (above brake pedal assembly)
Underhood fuse block (above left front wheelwell)
X1 a7

STARTING/CHARGING

Charging Wiring Diagram for Hummer H3 2008

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List of elements for Charging Wiring Diagram for Hummer H3 2008:

(on lower left side of engine block, rearward of g103)
Batt pos vol
Batt pos vol field duty cycle sig c
Battery
Charge indicator
Class 2
Class 2 series data
Clstr fuse 19 10a
Computer data lines system
Driver information center (dic)
Engine control module (ecm) (right rear corner of engine compt)
Field duty
G100 (in engine compt, mounted to left front inner fender, behind battery)
G102
G104 (left side of engine block, in front of starter)
Generator
Generator battery control module (left front of engine compt, near battery)
Gnd
Instrument panel cluster (ipc)
J136
Logic
Mega fuse fuse 91 125a
Power distribution system
Red
Reg contrl
Rvc pwr fuse 7 10a
Rvc vsense+ fuse 32 10a
Serial data
Starter
Turn on sig
Underhood fuse block (above left front wheelwell)
Used) (not
Volt gauge
X1 serial data
X2 cycle sig
X3 control regulator

Starting Wiring Diagram, A/T for Hummer H3 2008

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List of elements for Starting Wiring Diagram, A/T for Hummer H3 2008:

A x1
A x2
Acc
Batt ign switch fuse 5 10a
Battery
Body control module (bcm) (behind right front kick panel)
Engine control module (ecm) (right rear corner of engine compt)
G100 (in engine compt, mounted to left front inner fender, behind battery)
G102 (on lower left side of engine block, rearward of g103)
G104 (left side of engine block, in front of starter)
G105 (on left inner front wheelwell, behind battery)
Ignition switch
Ignition voltage
J200
Off
Park/neutral position (pnp) switch (left side of automatic transmission)
Pcm 1 fuse 21 10a
Pcm cntrl relay 77
Pnk
Pnp/clutch start switch signal
Power distribution system
Red
Run
Run/crnk relay 78
Start
Starter
Starter enable relay control
Strtr fuse 85 30a
Underhood fuse block (above left front wheelwell)
X1 b6
X2 b8

Starting Wiring Diagram, M/T for Hummer H3 2008

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List of elements for Starting Wiring Diagram, M/T for Hummer H3 2008:

5v ref
A14
A42
A47
Acc
Battery
Body control module (bcm) (behind right front kick panel)
Computer data lines system
Engine control module (ecm) (right rear corner of engine compt)
G100 (in engine compt, mounted to left front inner fender, behind battery)
G102 (on lower left side of engine block, rearward of g103)
G104 (left side of engine block, in front of starter)
Ign
Ign volt
Ignition switch
Off
Pcm cntrl relay
Power distribution system
Red
Run
Serial data
Start
Starter
Strtr fuse 85 30a
Tan
Underhood fuse block (above left front wheelwell)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for Hummer H3 2008

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List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Hummer H3 2008:

(on right inner front wheelwell) g106
Accessory switch
Air bag fuse 27 10a
Driver seat belt pretensioner (at left inner "b" pillar)
G310 (mounted under left side of passenger seat)
Gnd
Hot w/ run/crank relay energized
I/p stage 1-hi
I/p stage 1-lo
I/p stage 2-hi
I/p stage 2-lo
Ignition voltage
Inflatable restraint i/p module (above dash compartment)
Inflatable restraint passenger air bag on/off indicator
Inflatable restraint sensing & diagnostic module (sdm) (beneath lower console)
Inflatable restraint steering wheel module (in steering column)
Inflatable restraint steering wheel module coil (mounted to steering wheel)
J205
J310
Lh asf sig
Lh asf volt
Lh asf-hi
Lh asf-lo
Lh belt sw
Lh pretens-hi
Lh pretens-lo
Lh sens sig
Lh sens volt
Nca
Off
Passenger seat belt indicator
Passenger seat belt pretensioner (at right inner "b" pillar)
Pin shorting bars engaged
Pnk
Pos rtrn
Pos sensor-hi
Red
Rh asf sig
Rh asf volt
Rh asf-hi
Rh asf-lo
Rh belt sw
Rh pretens-hi
Rh pretens-lo
Rh sens sig
Rh sens volt
Serial data
Serial data link
Shorting bar
Stage 1
Stage 1-hi ctrl
Stage 1-lo ctrl
Stage 2
Stage 2-hi
Stage 2-lo
Tan
Underhood fuse block (above left front wheelwell)
When module connector is disconnected from harness (shorting bars are connected between pins: 6-7, 10-11, 12-13 & 14-15)

Supplemental Restraints Wiring Diagram (2 of 2) for Hummer H3 2008

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List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Hummer H3 2008:

(behind right front kick panel) body control module
(in body harness, approximately 13 cm (5.1 in) right of breakout to g310) (w/ head curtain air bag) j323
(left side of dash) data link connector (dlc)
(mounted under left side of passenger seat) g310
A39 x2
A42 x1
Air bag ind
Driver seat belt switch (part of seat belt buckle (driver))
G310 (mounted under left side of passenger seat)
Gnd
Ign
Ign volt
Ignition volt
Inflatable restraint front passenger presence system (pps) module (on underside of cushion)
Inflatable restraint front passenger presence system (pps) sensor (in front passenger seat cushion)
Inflatable restraint vehicle rollover sensor (w/ head curtain air bag) (under center console)
Instrument panel cluster (ipc)
Ipc class 2 serial data
J310
J310 (in body harness, approximately 4.5 cm (1.8 in) left of breakout to a/t floor shift control)
J344 (in body harness, approximately 20 cm (7 in) to left of sdm breakout)
Left inflatable restraint front end sensor (left lower radiator support)
Left inflatable restraint roof rail module (w/ head curtain air bag) (upper left "b" pillar)
Left inflatable restraint seat position sensor (on driver seat track)
Left inflatable restraint side impact sensor (sis) (w/ head curtain air bag) (in left front door)
Logic
Low ref
Nca
Off ind
On ind
Passenger seat belt buckle
Pnk
Press sig
Red
Right inflatable restraint front end sensor (right lower radiator support)
Right inflatable restraint roof rail module (w/ head curtain air bag) (upper right "b" pillar)
Right inflatable restraint seat position sensor (on driver seat track)
Right inflatable restraint side impact sensor (sis) (w/ head curtain air bag) (in right front door)
Seat belt ind
Serial
Shorting bar
Tan
Tension sig
Volt ref
X2 a38

TRANSMISSION

A/T Wiring Diagram for Hummer H3 2008

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List of elements for A/T Wiring Diagram for Hummer H3 2008:

1-2 shift sol ctrl
1-2 shift solenoid (ss) valve
2-3 shift sol ctrl
2-3 shift solenoid (ss) valve
3-2 shift sol ctrl
3-2 shift solenoid (ss) valve
Air pump rly fuse 17 10a
Automatic transmission
Automatic transmission fluid pressure manual valve position switch
Automatic transmission fluid temperature (tft) sensor
Computer data lines system
Engine control module (ecm) (right rear corner of engine compt)
Exterior lights system
G102 (on lower left side of engine block, rearward of g103)
Gnd
Hi spd ser data bus +
Hi spd ser data bus -
Hi spd serial data +
Hi spd serial data -
Hot at all times
Hot in on or start
Ign volt
In shaft spd sens
Input speed sensor (iss)
J133
Lo ref
P/n
Park/neutral position (pnp) switch (left side of automatic transmission)
Pc sol valve hi ctrl
Pc sol valve lo ctrl
Pnk
Pnp/clutch start sw sig x3
Power distribution system
Pressure control (pc) solenoid valve
Red
Rev
Stop lamp ctrl
Tan
Tcc pwm sol ctrl
Tcc sol valve ctrl
Tcm pwr fuse 26 10a
Tft sens sig
Torque converter clutch (tcc) pulse width modulation (pwm) solenoid valve
Torque converter clutch (tcc) solenoid valve
Trans fluid sw a
Trans fluid sw b
Trans fluid sw c
Trans fuse 34 10a
Trans range sw a
Trans range sw b
Trans range sw c
Trans range sw p
Transmission control module (tcm)
Underhood fuse block (above left front wheelwell)
Vehicle speed sensor (vss) (left rear of transfer case)
Vss hi sig
Vss lo sig

Transfer Case Wiring Diagram for Hummer H3 2008

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List of elements for Transfer Case Wiring Diagram for Hummer H3 2008:

(on right inner front wheelwell) g106
4 hi
4 hi ind
4 hi lock
4 hi lock ind
4 lo ind
4 lo lock
4 lo lock ind
4wd ind
4wd lo sig
5v ref
A encoder sig
Accessory switch
B encoder sig
Bat
Body control module (bcm) (behind right front kick panel)
C encoder sig
Computer data lines system
Ctrl ign rly
Diff lock
Diff lock hi
Diff lock ind
Driver information center (dic)
Encoder lo ref
Engine control module (ecm) (right rear corner of engine compt)
Gnd
Hot at all times
Hvac relay 87
Instrument panel cluster (ipc)
Lo ref
Logic
Low sig 4wd
Motor ctrl a
Motor ctrl b
Nca
Neu ind ctrl
Neutral ind
P encoder sig
Pnk
Rear differential lock actuator (mounted to center of rear axle)
Red
Red/
Serial data
Switch sig
Tccm fuse 12 30a
Tccm switch fuse 58 10a
Transfer case encoder motor (part of transfer case)
Transfer case shift control module (behind glove box)
Underhood fuse block (above left front wheelwell)
X1 a26

WARNING SYSTEMS

Warning Systems Wiring Diagram for Hummer H3 2008

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List of elements for Warning Systems Wiring Diagram for Hummer H3 2008:

(in body harness, approximately 42 cm (16.5 in) rearward of breakout to right seat belt pretensioner) j347
A10
A14
A26
A31
A32
A38
A39
A42
A44
Accessory switch
Auto
Batt ign switch fuse 5 10a
Battery
Bcm fuse 14 10a
Body control module (bcm) (behind right front kick panel)
Brake ind
Chime
Class 2 serial data
Computer data lines system
Driver door ajar switch (in lower left "b" pillar)
Driver information center (dic)
Driver seat belt buckle
Driver seat belt switch
G106 (on right inner front wheelwell)
G300 (under driver seat carpet, on floor board)
G310 (mounted under left side of passenger seat)
G320 (under rear of middle console carpet, on floor board)
Headlamp switch
Hot at all times
Ignition switch
Ignition voltage
Inflatable restraint sensing & diagnostic module (sdm) (beneath lower console)
Instrument panel cluster (ipc)
J200
J205
J300
J310
J320
Key-in switch
Left rear door ajar switch (in lower left "c" pillar)
Left seat belt sw
Left turn ind
Lf door ajar
Logic
Low ref
Lr door ajar
Lr turn sig lamp ctrl
Nca
Off
Park
Park brake sw sig
Park brake switch (left lower side of dash)
Passenger door ajar switch (in lower right "b" pillar)
Passenger seat belt buckle
Passenger seat belt ind
Passenger seat belt switch
Pk lmp sw sig
Red
Rf door ajar
Right rear door ajar switch (in lower right "c" pillar)
Right seat belt sw
Right turn ind
Rr door ajar
Rr turn sig lamp ctrl
Seat belt ind
Seat belt ind ctrl
Tire pressure ind
Underhood fuse block (above left front wheelwell)

WIPER/WASHER

Front Wiper/Washer Wiring Diagram for Hummer H3 2008

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List of elements for Front Wiper/Washer Wiring Diagram for Hummer H3 2008:

A20
Body control module (behind right front kick panel)
Frt/wpr fuse 6 25a
G105 (on left inner front wheelwell, behind battery)
G106 (on right inner front wheelwell)
Hi/low wpr relay
Hot at all times
Int
J143
J210
Mist
Nca
Off
On/off wpr relay
Park out
Rap relay coil control
Rap/accy relay 88
Red
S/roof frt/wpr fuse 9 15a
Turn signal/ multi-function switch
Underhood fuse block (above left front wheelwell)
Windshield washer fluid pump (mounted on fluid reservoir)
Windshield washer pump control
Windshield wiper motor (under center of front cowling)
Windshield wiper motor park switch signal
Windshield wiper switch signal 1
Windshield wiper switch signal 2
Windshield wiper/ washer switch
Wiper diode

Rear Wiper/Washer Wiring Diagram for Hummer H3 2008

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List of elements for Rear Wiper/Washer Wiring Diagram for Hummer H3 2008:

(center of endgate) rear window wiper motor
Accy voltage
Body control module (behind right front kick panel)
G106 (on right inner front wheelwell)
G350 (behind left rear quarter trim, near wheelwell)
Ground
Hot at all times
Ill
Interior lights system
J205
J292 (in body harness right kick panel area, approximately 3 cm (1.2 in) rearward of breakout to bcm)
J900
Logic
Low
Off
Rap relay coil control
Rap/accy relay 88
Rear window washer fluid pump (in right rear engine compt area)
Rear window wiper/ washer switch
Rear wpr switch/pump fuse 16 15a
Rear/wpr mtr fuse 15 15a
Underhood fuse block (above left front wheelwell)
Wash
Washer switch signal
Wiper control motor
Wiper delay 1 signal
Wiper delay 2 signal
Wiper motor