AIR CONDITIONING – Hummer H2 2008 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 3) for Hummer H2 2008

List of elements for Automatic A/C Wiring Diagram (1 of 3) for Hummer H2 2008:

• 5-volt reference
• A/c low pressure switch (on right side of a/c a
• A/c on ind
• A/c on switch
• Accumulator at rear of engine compt)
• Air request ind
• Air request switch
• Assembly ctrl
• Auto switch
• Aux hvac ign fuse 41 10a
• Auxiliary air temperature actuator (right rear of cargo area on the front of auxiliary hvac module)
• Auxiliary blower motor (upper rear of auxiliary hvac module)
• Auxiliary blower motor control module (rear of auxiliary hvac module above blower motor-auxiliary)
• Auxiliary mode actuator (left front of auxiliary hvac module assembly)
• B(+)
• Computer data lines system
• Ctrl
• Door position sig
• Fan down switch
• Fan up switch
• Front defogger ind
• Front defogger switch
• G103 (on front of right cylinder head)
• G200 (on left side of dash, behind left kick panel)
• G203 (at lower right side of dash, behind right kick panel)
• G410 (on passenger side rear of body near d-pillar behind trim panel)
• Gmlan serial data
• Gnd
• Ground
• Hot at all times
• Hot w/ run/crank relay energized
• Hvac batt fuse 33 10a
• Hvac blwr fuse 61 40a
• Hvac control module
• Hvac ign fuse 46 10a
• I/p fuse block (on lower left side of i/p, behind access panel)
• Ig voltage
• J215
• J441
• J442
• J443
• Left i/p junction block (lower left side of instrument panel to left of steering column)
• Left i/p junction block x11 (lower left side of instrument panel to left of steering column)
• Left temperature control
• Lo press sens sig
• Logic
• Logic speed down
• Low reference
• Mode
• Mode door ctrl
• Mode down switch
• Mode up switch
• Motor speed ctrl
• Off switch
• On/ off
• Pnk
• Position sens sig
• Power distribution system
• Rear defogger ind
• Rear defogger switch
• Rear hvac fuse 30a
• Rear seat audio (rsa) control
• Recir door ctrl
• Recir- culation ind
• Recir- culation switch
• Right sw sig
• Right temperature control
• Sens sig
• Serial data
• Speed ctrl
• Speed up
• Sunload sens sig
• Tan
• Temp door ctrl
• Temp down
• Temp sens sig
• Temp up
• Underhood fuse block (at left side of engine compt, near battery)

Automatic A/C Wiring Diagram (2 of 3) for Hummer H2 2008

List of elements for Automatic A/C Wiring Diagram (2 of 3) for Hummer H2 2008:

• (at right lower side of dash, on hvac assembly) blower motor
• (behind right side of dash, on hvac assembly) blower motor control module
• (left front of engine compt below battery & fuse block underhood) engine control module
• (left side of engine block, between cylinder 3 & cylinder 5) engine coolant temperature (ect) sensor
• (on top center of dash) ambient light/ sunload sensor
• 4a1
• 4a4
• 4a5
• 4a6
• 4b2
• 4b3
• 4b5
• 4b6
• 5v ref
• A/c clutch
• A/c cmprsr fuse 15 10a
• A/c cmprsr relay
• Ect sig
• G200 (on left side of dash, behind left kick panel)
• G203 (at lower right side of dash, behind right kick panel)
• Gnd
• Headlights system
• Hi spd fan
• Hot at all times
• Left air temperature actuator (bottom center of hvac module assembly)
• Left i/p junction block (lower left side of instrument panel to left of steering column)
• Left sunload sensor
• Lo spd fan
• Logic
• Low ref
• Mode actuator (on left side of hvac assembly)
• Pnk
• Recirculation actuator (on top front of hvac assembly)
• Red
• Right air temperature actuator (at middle top of hvac assembly)
• Right i/p junction block (right side of i/p behind end trim panel)
• Right sunload sensor
• Rly ctrl
• Sens sig
• Spd ctrl
• Tan
• Underhood fuse block (at left side of engine compt, near battery)

Automatic A/C Wiring Diagram (3 of 3) for Hummer H2 2008

List of elements for Automatic A/C Wiring Diagram (3 of 3) for Hummer H2 2008:

• (at lower right front of engine) a/c compressor clutch
• (right front corner of vehicle on frame rail near front tow hook) g101
• (right front lower engine compt on high pressure line near compressor) a/c refrigerant pressure sensor
• 4a2
• 4a3
• 87a
• Ambient air temperature sensor (at right front of vehicle, to right of radiator support)
• Cooling fan diode 1
• Cooling fan diode 2
• Fan 1 fuse 50 40a
• Fan 2 fuse 53 40a
• Fan control relay
• Fan hi relay
• Fan lo relay
• G100 (on left front frame body mount)
• G104 (at rear of left cylinder head)
• G203 (at lower right side of dash, behind right kick panel)
• Hot at all times
• Inside air temperature sensor (in left front headliner above driver)
• J100
• J101
• J102
• J206
• J301
• Left engine cooling fan (left front of engine compt near radiator)
• Left i/p junction block (lower left side of instrument x9 panel to left of steering column)
• Lower left air temperature sensor (near middle left side of i/p under left round discharge duct)
• Lower right air temperature sensor (near middle right side of i/p in front of rectangular discharge duct)
• Pwr/ trn relay
• Right engine cooling fan (right front of engine compt near radiator)
• Right i/p junction block (right side of i/p x4 behind end trim panel)
• Tan
• Underhood fuse block (at left side of engine compt, near battery)
• Upper left air temperature sensor (at top rear of i/p below dash trim panel to left of ambient light/sunload sensor)
• Upper right air temperature sensor (at top rear of i/p below dash trim panel to right of ambient light/sunload sensor)

Compressor Wiring Diagram for Hummer H2 2008

List of elements for Compressor Wiring Diagram for Hummer H2 2008:

• 5v ref
• A/c cmprsr fuse 15 10a
• A/c comp
• A/c compressor clutch (at lower right front of engine)
• A/c compressor relay
• A/c low pressure switch (on right side of a/c accumulator at rear of engine compt)
• A/c on ind
• A/c on switch
• A/c ref pre
• A/c refrigerant pressure sensor (right front lower engine compt on high pressure line near compressor)
• Cl rly ctrl
• Class 2
• Class 2 ser data
• Computer data lines system
• G103 (on front of right cylinder head)
• G104 (at rear of left cylinder head)
• Hot at all times
• Hvac control module
• J102 (in engine harness, 4 cm from knock sensor connector harness junction to engine harness)
• J103 (in engine harness, 10 cm from junction of fuel injector 3 harness to engine harness)
• Lo press sens sig
• Logic
• Low ref
• Serial data
• Tan
• Underhood fuse block (at left side of engine compt, near battery)
• X1 sens sig engine control module (left front of engine compt below battery & fuse block underhood)