AIR CONDITIONING – Chevrolet TrailBlazer 2006 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram, Long Wheel Base (1 of 3) for Chevrolet TrailBlazer 2006

List of elements for Automatic A/C Wiring Diagram, Long Wheel Base (1 of 3) for Chevrolet TrailBlazer 2006:

• (i/p harness, 15.5 cm from reci- rculation actuator connector)
• (i/p harness, 16 cm from sp201 breakout, toward dlc) s211
• (i/p harness, 5 cm from mode motor breakout, toward instrument cluster breakout)
• 5v ref
• A/c comp status
• A/c low press sw
• A10
• A11
• A12
• Air temp door ctrl
• Air temp dr pos sig
• Air temperature actuator (left) (behind left center of dash)
• Air temperature actuator (right) (behind right center of dash)
• Ambient air temp sig
• Ambient air temperature sensor (on left center of radiator support)
• Ambient light
• Ambient light/ sun load sensor assembly (on top center of dash, near base of windshield)
• B10
• B11
• B12
• Batt pos volt
• Battery
• Blower fuse 35 40a
• Blower motor (below right side of dash)
• Blower motor control module (lower right side of dash)
• Blwr mtr spd ctrl
• Class 2
• Coolant bypass ctrl
• Def door pos sig
• Defrost actuator (behind upper left center of dash)
• Defrost door ctrl
• G102 (left side of underhood compt, near rear of underhood fuse block)
• G201
• G302 (on lower left "b" pillar)
• Ground
• Hot at all times
• Hot in run
• Hvac control module (center of dash)
• Hvac i fuse 39 10a
• Hvac-b fuse 36 10a
• Ign 3
• Inside air temp ctrl
• Inside air temp sig
• Inside air temperature sensor assembly (at top of left "b" pillar, behind trim)
• Interior lights system
• Left sensor
• Logic
• Low ref
• Low reference
• Lower left air temperature sensor (behind lower left center of dash, on air duct)
• Lower right air temperature sensor (behind lower right side of dash, on air duct)
• Lps dimming ctrl
• Lwr lt air temp sig
• Lwr rt air temp sig
• Mode actuator (behind upper left center of dash)
• Mode door ctrl
• Mode door pos sig
• Nca
• Rear fuse block (below left rear seat)
• Recirc door cntrl
• Recirc dr pos sig
• Recirculation actuator (behind upper right side of dash)
• Red
• Right sensor
• S202 (i/p harness, 16.5 cm from steering column connector breakout, toward dlc breakout)
• S216
• S217
• S271 (i/p harness, 14.5 cm from dash compt, lamp breakout, toward center of dash)
• S302 (5 cm from main harness breakout for c700, toward g302)
• Solid state
• Sp201 (at lower right front of lower console)
• Tan
• Under- hood fuse block (on left side of engine compt)
• Upper left air temperature sensor (behind upper left center of dash)
• Upper right air temperature sensor (behind upper right center of dash)
• Uppr lt air temp sig
• Uppr rt air temp sig

Automatic A/C Wiring Diagram, Long Wheel Base (2 of 3) for Chevrolet TrailBlazer 2006

List of elements for Automatic A/C Wiring Diagram, Long Wheel Base (2 of 3) for Chevrolet TrailBlazer 2006:

• (5.3l & 6.0l)
• (forward lamp harness, 20 cm from windshield washer pump breakout, toward engine cooling fan breakout) s113
• (forward lamp harness, 8 cm from rear washer pump motor breakout, toward right turn signal breakout) s103
• (left front of underhood compt, on left side of radiator support) g103
• +5v ref
• 0-12v pulse
• 4.2l
• 4.2l 5.3l & 6.0l
• 4wd fuse 48 15a
• 5.3l & 6.0l
• A/c compressor clutch assembly
• A/c fuse 30 10a
• A/c low pressure switch (at right rear of engine compt, on accumulator)
• A/c press sig
• A/c relay 44
• A12
• Air conditioning refrigerant pressure sensor (on high pressure line near a/c compressor)
• Ambient light sens
• Auxiliary water pump
• Auxiliary water pump relay 1 (right rear of engine compt)
• B11
• B12
• Body control module (bcm) (beneath left rear seat, on rear fuse block)
• Comp rly cntrl
• Coolant bypass valve
• Cooling fan (4.2l: front of engine)
• Cooling fan relay
• D11
• Data link connector (on bottom of left side of dash)
• E12
• Eap fuse 15 15a
• Ect sens sig
• Engine coolant temperature (ect) sensor (4.2l: upper left side of engine) (5.3l: on left front of engine block, near generator)
• F12
• Fan fuse 20 10a
• G103 (left front of underhood compt, on left side of radiator support)
• G107 (on lower left side of engine)
• G108 (on lower left side of engine)
• Hall sensor
• High spd maf
• Hot at all times
• Hot in run
• Hot in run or start
• Ign e fuse 22 10a
• Low ref
• Low reference
• Lt sunload sens sig
• Powertrain control module (pcm) (4.2l) engine control module (ecm) (5.3l & 6.0l) (4.2l: on upper left side of engine) (5.3l: near lower left front of engine)
• Rear fuse block (below left rear seat)
• Rt sunload sens sig
• S101 (in engine harness, 4cm from breakout to c107, towards ecm)
• S103 (forward lamp harness, 8 cm from rear washer pump breakout, toward toward right turn signal breakout)
• S232 (w/ immobilizer) (i/p harness, 10 cm from steering column breakout, toward shift control module)
• Serial data
• Sp205 (behind left of dash, near headlamp switch connector)
• Underhood fuse block (on left side of engine compt)

Automatic A/C Wiring Diagram, Long Wheel Base (3 of 3) for Chevrolet TrailBlazer 2006

List of elements for Automatic A/C Wiring Diagram, Long Wheel Base (3 of 3) for Chevrolet TrailBlazer 2006:

• (in lower console harness, between auxiliary hvac module & c309)
• (in lower console harness, between auxiliary hvac module) & c309)
• (on lower right "d" pillar) g402
• 30a
• 5v reference
• A10
• A11
• A12
• A13
• A14
• A15
• A16
• Auc hvac enable
• Aux act door ctlr
• Aux air temp dr ctlr
• Aux air temp dr pos
• Aux blwr mtr
• Aux mode door ctrl
• Aux mode dr pos sig
• Auxiliary air temperature actuator (right rear of vehicle)
• Auxiliary blower motor (on right side of cargo area, behind trim panel)
• Auxiliary blower motor control processor (in rear hvac module, behind right rear interior panel)
• Auxiliary blower motor fuse
• Auxiliary console mode actuator
• Auxiliary mode actuator (below center of dash)
• B10
• B11
• B12
• B13
• B14
• B15
• B16
• Battery
• Class 2 data
• Console mode dr ctrl
• Console mode dr pos sig
• Front auxiliary blower motor switch
• G201
• Ground auxiliary hvac control module (under lower console)
• Hot at all times
• Interior lights system
• Low reference
• Off
• Rear
• Rear fuse block (below left rear seat)
• Red
• Rr hvac fuse 13 30a
• S307 (console harness)
• S324
• S325
• S326
• S402
• Sp201 (at lower right front of lower console)
• Txv solenoid ctrl

Automatic A/C Wiring Diagram, Short Wheel Base (1 of 2) for Chevrolet TrailBlazer 2006

List of elements for Automatic A/C Wiring Diagram, Short Wheel Base (1 of 2) for Chevrolet TrailBlazer 2006:

• (i/p harness, 15.5 cm from reci- rculation actuator connector)
• (i/p harness, 16 cm from sp201 breakout, toward dlc) s211
• (i/p harness, 5 cm from mode motor breakout, toward instrument cluster breakout)
• 5v ref
• A/c comp status
• A/c low press sw
• A10
• A11
• A12
• Air temp door ctrl
• Air temp dr pos sig
• Air temperature actuator (left) (behind left center of dash)
• Air temperature actuator (right) (behind right center of dash)
• Ambient air temp sig
• Ambient air temperature sensor (on left center of radiator support)
• Ambient light
• Ambient light/ sun load sensor assembly (on top center of dash, near base of windshield)
• B10
• B11
• B12
• Batt pos volt
• Battery
• Blower fuse 35 40a
• Blower motor (below right side of dash)
• Blower motor control module (lower right side of dash)
• Blwr mtr spd ctrl
• Class 2
• Def door pos sig
• Defrost actuator (behind upper left center of dash)
• Defrost door ctrl
• G102 (left side of underhood compt, near rear of underhood fuse block)
• G201
• G302 (on lower left "b" pillar)
• Ground
• Hot at all times
• Hot in run
• Hvac control module (center of dash)
• Hvac i fuse 39 10a
• Hvac-b fuse 36 10a
• Ign 3
• Inside air temp ctrl
• Inside air temp sig
• Inside air temperature sensor assembly (at top of left "b" pillar, behind trim)
• Interior lights system
• Left sensor
• Logic
• Low ref
• Low reference
• Lower left air temperature sensor (behind lower left center of dash, on air duct)
• Lower right air temperature sensor (behind lower right of dash, on air duct)
• Lps dimming ctrl
• Lwr lt air temp sig
• Lwr rt air temp sig
• Mode actuator (behind upper left center of dash)
• Mode door ctrl
• Mode door pos sig
• Nca
• Rear fuse block (below left rear seat)
• Recirc door cntrl
• Recirc dr pos sig
• Recirculation actuator (behind upper right side of dash)
• Red
• Right sensor
• S216
• S217
• S271 (i/p harness, 14.5 cm from dash compt, lamp breakout, toward center of dash)
• Solid state
• Sp201 (at lower right front of lower console)
• Tan
• Toward dlc breakout)
• Under- hood fuse block (on left side of engine compt)
• Upper left air temperature sensor (behind upper left center of dash)
• Upper right air temperature sensor (behind upper right center of dash)
• Uppr lt air temp sig
• Uppr rt air temp sig
• W/ rear a/c

Automatic A/C Wiring Diagram, Short Wheel Base (2 of 2) for Chevrolet TrailBlazer 2006

List of elements for Automatic A/C Wiring Diagram, Short Wheel Base (2 of 2) for Chevrolet TrailBlazer 2006:

• (5.3l & 6.0l)
• (forward lamp harness, 20 cm from windshield washer pump breakout, toward engine cooling fan breakout) s113
• (left front of underhood compt, on left side of radiator support) g103
• (not used)
• +5v ref
• 0-12v pulse
• 4.2l
• 4.2l 5.3l & 6.0l
• 5.3l & 6.0l
• A/c compressor clutch assembly
• A/c fuse 30 10a
• A/c low pressure switch (at right rear of engine compt, on accumulator)
• A/c press sig
• A/c relay 44
• A12
• Air conditioning refrigerant pressure sensor (on high pressure line near a/c compressor)
• Ambient light sens
• Aux blwr hi spd
• Aux blwr med spd
• Aux mode dr
• Auxiliary console mode actuator (w/ rear a/c) (below center of dash)
• Auxiliary hvac control module (under lower console)
• B11
• B12
• Batt
• Body control module (bcm) (beneath left rear seat, on rear fuse block)
• Class 2 data
• Comp rly cntrl
• Cooling fan (4.2l: front of engine)
• D11
• Data link connector (on bottom of left side of dash)
• E12
• Ect sens sig
• Engine coolant temperature (ect) sensor (4.2l: upper left side of engine) (5.3l: on left front of engine block, near generator)
• F12
• Fan fuse 20 10a
• Fan relay
• G103 (left front of underhood compt, on left side of radiator support)
• G107 (on lower left side of engine)
• G108 (on lower left side of engine)
• G201
• Ground
• Hall sensor
• High spd maf
• Hot at all times
• Hot in run or start
• Ign e fuse 22 10a
• Low ref
• Low reference
• Lt sunload sens sig
• Mode
• Off
• Powertrain control module (pcm) (4.2l) engine control module (ecm) (5.3l & 6.0l) (4.2l: on upper left side of engine) (5.3l: near lower left front of engine)
• Rear blower motor
• Rear blower resistor
• Red
• Rt sunload sens sig
• S101 (in engine harness, 4cm from breakout to c107, towards ecm)
• S103 (forward lamp harness, 8 cm from rear washer pump breakout, toward toward right turn signal breakout)
• S232 (w/ immobilizer) (i/p harness, 10 cm from steering column breakout, toward shift control module)
• S307 (console harness)
• Serial data
• Sp201 (at lower right front of lower console)
• Sp205 (behind left of dash, near headlamp switch connector)
• Underhood fuse block (on left side of engine compt)
• W/ rear a/c

Compressor Wiring Diagram for Chevrolet TrailBlazer 2006

List of elements for Compressor Wiring Diagram for Chevrolet TrailBlazer 2006:

• (i/p harness, 10 cm from steering column breakout, toward shift control module) (w/ immobilizer) s232
• (left front of underhood compt, on left side of radiator support) g103
• +5v ref
• 4.2l
• 4.2l 5.3l & 6.0l
• 5.3l & 6.0l
• A/c comp status
• A/c compressor clutch assembly
• A/c fuse 30 10a
• A/c low press sw
• A/c low pressure switch (at right rear of engine compt, on accumulator)
• A/c press sig
• A/c relay 44
• A12
• Air conditioning refrigerant pressure sensor (on high pressure line near a/c compressor)
• B11
• B12
• Class 2
• Comp rly cntrl
• D11
• Data link connector (on bottom left side of dash)
• E12
• F12
• G102 (left side of underhood compt, near rear of underhood fuse block)
• G107 (on lower left side of engine)
• G201
• Ground
• Hot at all times
• Hot in run
• Hot in run or start
• Hvac 1 fuse 39 10a
• Hvac control module (center of dash)
• Hvac-b fuse 36 10a
• Ign 3
• Ign e fuse 22 10a
• Low ref
• Power
• Powertrain control module (pcm) (4.2l) engine control module (ecm) (5.3l & 6.0l) (4.2l: on upper left side of engine) (5.3l: near lower left front of engine)
• Rear fuse block (below left rear seat)
• S103 (forward lamp harness, 8 cm from rear washer pump breakout, toward right turn signal breakout)
• S202 (i/p harness, 16.5 cm from steering column connector breakout, toward dlc breakout)
• S211 (i/p harness, 16 cm from sp201 breakout, toward dlc)
• Serial data
• Sp201 (at lower right front of lower console)
• Sp205 (behind left of dash, near headlamp switch connector)
• Underhood fuse block (on left side of engine compt)

Manual A/C Wiring Diagram, Long Wheel Base (1 of 3) for Chevrolet TrailBlazer 2006

List of elements for Manual A/C Wiring Diagram, Long Wheel Base (1 of 3) for Chevrolet TrailBlazer 2006:

• (below right side of dash) blower motor resistor assembly
• (i/p harness, 15.5 cm from reci- rculation actuator connector)
• (i/p harness, 16 cm from sp201 breakout, toward dlc) s211
• (i/p harness, 5 cm from mode motor breakout, toward instrument cluster breakout)
• (in the i/p harness, 4 cm from breakout to inflatable restraint i/p module toward blower motor resistor assembly)
• (not used)
• 4wd fuse 48 15a
• 5v ref
• A/c comp status
• A/c low press sw
• A10
• A11
• A12
• Air temp door ctrl
• Air temp dr pos sig
• Air temperature actuator (left) (behind left center of dash)
• Air temperature actuator (right) (behind right center of dash)
• B10
• B11
• B12
• Battery
• Blower fuse 35 40a
• Blower motor (below right side of dash)
• Blower motor relay
• Class 2
• Cool by pass sol ctrl
• Def door pos sig
• Defrost actuator (behind upper left center of dash)
• Defrost door ctrl
• G102 (left side of underhood compt, near rear of underhood fuse block)
• G201
• Ground
• High
• Hot at all times
• Hot in run
• Hvac control module (center of dash)
• Hvac fuse 44 30a
• Hvac i fuse 39 10a
• Hvac-b fuse 36 10a
• Ign 3
• Interior lights system
• Low
• Low ref
• Lps dimming ctrl
• Med1
• Med2
• Med3
• Mode actuator (behind upper left center of dash)
• Mode door ctrl
• Mode door pos sig
• Off
• Off blwr mtr cntrl
• Rear fuse block (below left rear seat)
• Recirc door cntrl
• Recirculation actuator (behind upper right side of dash)
• Red
• S201
• S202 (i/p harness, 16.5 cm from steering column connector breakout, toward dlc breakout)
• S216
• S217
• S250
• Solid state
• Sp201 (at lower right front of lower console)
• Tan
• Under- hood fuse block (on left side of engine compt)

Manual A/C Wiring Diagram, Long Wheel Base (2 of 3) for Chevrolet TrailBlazer 2006

List of elements for Manual A/C Wiring Diagram, Long Wheel Base (2 of 3) for Chevrolet TrailBlazer 2006:

• (5.3l & 6.0l)
• (forward lamp harness, 20 cm from windshield washer pump breakout, toward engine cooling fan breakout) s113
• (forward lamp harness, 8 cm from rear washer pump motor breakout, toward right turn signal breakout) s103
• (left front of underhood compt, on left side of radiator support) g103
• +5v ref
• 0-12v pulse
• 4.2l
• 4.2l 5.3l & 6.0l
• 5.3l & 6.0l
• A/c compressor clutch assembly
• A/c fuse 30 10a
• A/c low pressure switch (at right rear of engine compt, on accumulator)
• A/c press sig
• A/c relay
• Air conditioning refrigerant pressure sensor (on high pressure line near a/c compressor)
• Auxiliary water pump
• Auxiliary water pump relay 1 (right rear of engine compt)
• B11
• Comp rly cntrl
• Coolant bypass valve
• Cooling fan (4.2l: front of engine)
• D11
• Data link connector (on bottom of left side of dash)
• E12
• Eap fuse 15 15a
• Ect sens sig
• Engine coolant temperature (ect) sensor (4.2l: upper left side of engine) (5.3l: on left front of engine block, near generator)
• F12
• Fan fuse 20 10a
• Fan relay
• G103 (left front of underhood compt, on left side of radiator support)
• G107 (on lower left side of engine)
• G108 (on lower left side of engine)
• Hall sensor
• High spd maf
• Hot at all times
• Hot in run or start
• Ign e fuse 22 10a
• Low ref
• Powertrain control module (pcm) (4.2l) engine control module (ecm) (5.3l & 6.0l) (4.2l: on upper left side of engine) (5.3l: near lower left front of engine)
• S101 (in engine harness, 4cm from breakout to c107, towards ecm)
• S103 (forward lamp harness, 8 cm from rear washer pump breakout, toward right turn signal breakout)
• S232 (w/ immobilizer) (i/p harness, 10 cm from steering column breakout, toward shift control module)
• Serial data
• Sp205 (behind left of dash, near headlamp switch connector)
• Underhood fuse block (on left side of engine compt)

Manual A/C Wiring Diagram, Long Wheel Base (3 of 3) for Chevrolet TrailBlazer 2006

List of elements for Manual A/C Wiring Diagram, Long Wheel Base (3 of 3) for Chevrolet TrailBlazer 2006:

• (in lower console harness, between auxiliary hvac module & c309)
• (in lower console harness, between auxiliary hvac module) & c309)
• (on lower right "d" pillar) g402
• 30a
• 5v reference
• A10
• A11
• A12
• Auc hvac enable
• Aux act door ctlr
• Aux air temp dr ctlr
• Aux air temp dr pos
• Aux blwr mtr auxiliary hvac control module (under lower console)
• Aux mode door ctrl
• Aux mode dr pos sig
• Auxiliary air temperature actuator (right rear of vehicle)
• Auxiliary blower motor (on right side of cargo area, behind trim panel)
• Auxiliary blower motor control processor (in rear hvac module, behind right rear interior panel)
• Auxiliary blower motor fuse
• Auxiliary console mode actuator
• Auxiliary mode actuator (below center of dash)
• B10
• B11
• B12
• Battery
• Class 2 data
• Console mode dr ctrl
• Console mode dr pos sig
• Dimming ctrl
• Front auxiliary blower motor switch
• G201
• Ground
• Hot at all times
• Interior lights system
• Low reference
• Off
• Rear
• Rear fuse block (below left rear seat)
• Red
• Rr hvac fuse 13 30a
• S307 (console harness)
• S324
• S325
• S326
• S402
• Sp201 (at lower right front of lower console)
• Txv sol ctrl

Manual A/C Wiring Diagram, Short Wheel Base (1 of 2) for Chevrolet TrailBlazer 2006

List of elements for Manual A/C Wiring Diagram, Short Wheel Base (1 of 2) for Chevrolet TrailBlazer 2006:

• (below right side of dash) blower motor resistor assembly
• (i/p harness, 15.5 cm from reci- rculation actuator connector)
• (i/p harness, 16 cm from sp201 breakout, toward dlc) s211
• (i/p harness, 5 cm from mode motor breakout, toward instrument cluster breakout)
• (in the i/p harness, 4 cm from breakout to inflatable restraint i/p module toward blower motor resistor assembly)
• (not used)
• 5v ref
• A/c comp status
• A/c low press sw
• A10
• A11
• A12
• Air temp door ctrl
• Air temp dr pos sig
• Air temperature actuator (left) (behind left center of dash)
• Air temperature actuator (right) (behind right center of dash)
• Aux hvac enable
• B10
• B11
• B12
• Battery
• Blower fuse 35 40a
• Blower motor (below right side of dash)
• Blower motor relay
• Class 2
• Def door pos sig
• Defrost actuator (behind upper left center of dash)
• Defrost door ctrl
• G102 (left side of underhood compt, near rear of underhood fuse block)
• G201
• Ground
• High
• Hot at all times
• Hot in run
• Hvac control module (center of dash)
• Hvac fuse 44 30a
• Hvac i fuse 39 10a
• Hvac-b fuse 36 10a
• Ign 3
• Interior lights system
• Low
• Low ref
• Lps dimming ctrl
• Med1
• Med2
• Med3
• Mode actuator (behind upper left center of dash)
• Mode door ctrl
• Mode door pos sig
• Off
• Off blwr mtr cntrl
• Rear fuse block (below left rear seat)
• Recirc door cntrl
• Recirculation actuator (behind upper right side of dash)
• Red
• S201
• S202 (i/p harness, 16.5 cm from steering column connector breakout, toward dlc breakout)
• S216
• S217
• S250
• Solid state
• Sp201 (at lower right front of lower console)
• Tan
• Under- hood fuse block (on left side of engine compt)
• W/ rear a/c

Manual A/C Wiring Diagram, Short Wheel Base (2 of 2) for Chevrolet TrailBlazer 2006

List of elements for Manual A/C Wiring Diagram, Short Wheel Base (2 of 2) for Chevrolet TrailBlazer 2006:

• (5.3l & 6.0l)
• (forward lamp harness, 20 cm from windshield washer pump breakout, toward engine cooling fan breakout) s113
• (left front of underhood compt, on left side of radiator support) g103
• (not used)
• +5v ref
• 0-12v pulse
• 4.2l
• 4.2l 5.3l & 6.0l
• 5.3l & 6.0l
• A/c compressor clutch assembly
• A/c fuse 30 10a
• A/c low pressure switch (at right rear of engine compt, on accumulator)
• A/c press sig
• A/c relay 44
• Air conditioning refrigerant pressure sensor (on high pressure line near a/c compressor)
• Aux dr mtr cntrl
• Aux hvac enable
• Auxiliary console mode actuator (w/ rear a/c) (below center of dash)
• Auxiliary hvac control module (under lower console)
• Bi lvl
• Comp rly cntrl
• Cooling fan (4.2l: front of engine)
• D11
• Data link connector (on bottom of left side of dash)
• E12
• Ect sens sig
• Engine coolant temperature (ect) sensor (4.2l: upper left side of engine) (5.3l: on left front of engine block, near generator)
• F12
• Fan fuse 20 10a
• Fan relay
• Floor
• G103 (left front of underhood compt, on left side of radiator support)
• G107 (on lower left side of engine)
• G108 (on lower left side of engine)
• G201
• Ground
• Hall sensor
• High spd maf
• Hot at all times
• Hot in run or start
• Ign e fuse 22 10a
• Ign voltage
• Lo ref
• Logic
• Low ref
• Power ind sig
• Powertrain control module (pcm) (4.2l) engine control module (ecm) (5.3l & 6.0l) (4.2l: on upper left side of engine) (5.3l: near lower left front of engine)
• Pwr ind
• S101 (in engine harness, 4cm from breakout to c107, towards ecm)
• S103 (forward lamp harness, 8 cm from rear washer pump breakout, toward right turn signal breakout)
• S232 (w/ immobilizer) (i/p harness, 10 cm from steering column breakout, toward shift control module)
• S307 (console harness)
• Serial data
• Sp201 (at lower right front of lower console)
• Sp205 (behind left of dash, near headlamp switch connector)
• Underhood fuse block (on left side of engine compt)
• Upper
• W/ rear a/c