AIR CONDITIONING – Hummer H3 2007 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Compressor Wiring Diagram for Hummer H3 2007

List of elements for Compressor Wiring Diagram for Hummer H3 2007:

• (in hvac harness) s250
• 5v ref
• A/c clutch diode 90
• A/c clutch relay
• A/c compressor clutch
• A/c refrigerant pressure sensor (on high pressure hose connection to compressor)
• A/c req sig
• A41
• A42
• A43
• Body control module (behind right front kick panel)
• Computer data lines system
• 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 energized
• Hvac control module (behind radio)
• Logic
• Low ref
• Manual a/c circuit
• Powertrain control module (pcm) (at left front side of engine compt)
• Press sens sig
• Rly ctrl
• Serial data
• Underhood fuse block (above left front wheel well)

Manual A/C Wiring Diagram (1 of 2) for Hummer H3 2007

List of elements for Manual A/C Wiring Diagram (1 of 2) for Hummer H3 2007:

• 5v ref
• 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
• Body control module (behind right front kick panel)
• Computer data lines system
• Evap temp sig
• G106 (on right inner front wheel well)
• G300 (under driver seat carpet, on floor board)
• Grd
• High
• High speed blower motor (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 relay
• Ign 3 volt
• Ign 3 voltage
• L air temp b
• L air temp sig
• Logic
• Low
• Mode door b
• Mode door sig
• Off
• R air temp b
• R air temp sig
• Rdo fuse 13 10a
• Recirc a
• Recirc b
• S205 (approximately 5 cm (2 in) right of breakout to left footwell lamp)
• S206 (approximately 7 cm (2.8 in) right of breakout to right footwell lamp)
• S251 (approximately 0.5 cm (0.2 in) right of breakout to left footwell lamp)
• Serial data
• Tan
• Underhood fuse block (above left front wheel well)

Manual A/C Wiring Diagram (2 of 2) for Hummer H3 2007

List of elements for Manual A/C Wiring Diagram (2 of 2) for Hummer H3 2007:

• (in hvac harness, approximately 10 cm (3.9 in) back from right air temperature actuator connector)
• (in hvac harness, approximately 23.5 cm (9.3 in) back from right air temperature actuator connector) s260
• (in hvac harness, approximately 28.5 cm (11.2 in) back from right air temperature actuator connector) s240
• (not used)
• 13.5 cm (5.3 in) before breakout to evaporator temperature sensor) s250
• 5v ref
• A/c clutch diode 90
• A/c clutch relay 76
• A/c compressor clutch
• A/c refrigerant pressure sensor (on high pressure hose connection to compressor)
• Computer data lines system
• 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 energized
• Left air temperature actuator (mounted to left side of hvac module assembly)
• Logic
• Low ref
• Mode actuator (on side of heater box)
• Nca
• Powertrain control module (pcm) (at left front side of engine compt)
• Press sens sig
• Recirculation actuator (upper right corner of heater case)
• Right air temperature actuator (mounted to left side of hvac module assembly)
• Rly ctrl
• S230
• Sens sig
• Serial data
• Tan
• Underhood fuse block (above left front wheel well)