AIR CONDITIONING – Hummer H3 2008 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Compressor Wiring Diagram for Hummer H3 2008

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

29

• (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

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

58

• (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

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

33

• (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)