AIR CONDITIONING – Mercury Grand Marquis LS 2009 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Mercury Grand Marquis LS 2009

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Mercury Grand Marquis LS 2009:

• A/c output
• Amb temp sens input
• Ambient air temperature sensor (front of upper radiator support)
• Battery
• Battery junction box (bjb) (right front of engine compt, behind battery)
• Blend door cool
• Blend door heat
• Blower
• Blower motor high
• Blower motor relay
• C228a
• C228b
• Central junction box (cjb) (below dash, left of steering column)
• Computer data lines system
• Eatc hvac module
• Front blower motor (right rear of engine compt)
• Front blower motor speed controller (at rear of engine compt)
• Fuse 10a
• Fuse 15a
• Fuse 40a
• G109 (front of right fender)
• G203 (behind right kick panel)
• Ground
• Hot at all times
• Hot in start
• In car temp sens
• In-vehicle temperature sensor (behind center of dash)
• Interior lights system
• Pot feed
• Pot feedback
• Pot rtn
• Pwm illum
• Run
• S121
• S207
• Scp bus (+)
• Scp bus (-)
• Sens rtn
• Steering wheel ctrl
• Sunload sens input
• Variable volt dim
• Vbc hbr
• Vbc input
• Vbc output

Automatic A/C Wiring Diagram (2 of 2) for Mercury Grand Marquis LS 2009

List of elements for Automatic A/C Wiring Diagram (2 of 2) for Mercury Grand Marquis LS 2009:

• (in engine control sensor & fuel charge wiring harness, near breakout to cop 4)
• A/c clutch field coil (lower right front of engine)
• A/c clutch relay
• A/c cycling switch
• A/c pressure transducer sensor (on right side center of engine)
• Accr
• Accs
• Acpt
• Audio control module (acm)
• Audio/climate control switch
• Autolamp sensor
• Autolamp sensor (under upper left side of dash)
• Battery junction box (bjb) (right front of engine compt, behind battery)
• C175b
• C175e
• C175t
• C2145a
• C218a
• C218b
• C290a
• Cht
• Clockspring
• Control solid state
• Cylinder-head temperature sensor (top left front of engine)
• Engine cooling fan module (left front of engine compt)
• Engine cooling fan motor
• Fc v
• Fuse 15a
• Fuse 50a
• G102 (front of left fender)
• G109 (front of right fender)
• G201 (behind right kick panel)
• G203 (behind right kick panel)
• Ground
• Hot at all times
• Interior lights system
• Lighting control module (under center of dash)
• Next
• Patil
• Powertrain control module (pcm) (left rear of engine compt)
• Pwr
• Red
• Remote
• S114
• S123 (in engine control sensor & fuel charge wiring harness, near breakout to powertrain control module (pcm))
• S126
• S201
• S210
• S294 (in breakout to steering wheel/ speed control switch)
• Sig rtn 1
• Temp+
• Temp-
• Temperature blend door actuator (behind right side of dash, on top of a/c plenum)
• Var spd in
• Vol+
• Vol-
• Vref

Manual A/C Wiring Diagram for Mercury Grand Marquis LS 2009

List of elements for Manual A/C Wiring Diagram for Mercury Grand Marquis LS 2009:

• (in engine control sensor & fuel charge wiring harness, near breakout to cop 4)
• (left rear of engine compt)
• (right rear of engine compt) s122
• A/c clutch field coil (lower right front of engine)
• A/c clutch relay
• A/c compressor clutch diode (early production)
• A/c cycling switch
• A/c max a/c
• A/c pressure transducer sensor (on right side center of engine)
• Accr
• Accs
• Acpt
• Battery junction box (bjb) (right front of engine compt, behind battery)
• Blower motor relay
• Blower motor switch
• C175b
• C175e
• C294a
• C294b
• C294c
• C294d
• Central junction box (cjb) (below dash, left of steering column)
• Cht
• Climate control assembly
• Control circuit
• Cylinder-head temperature sensor (top left front of engine)
• Def/floor
• Defrost
• Defrost def/floor
• Engine cooling fan module (left front of engine compt)
• Engine cooling fan motor
• Fc v
• Floor
• Front blower motor (right rear of engine compt)
• Front blower motor resistor assembly (rear of engine compt)
• Fuse 10a
• Fuse 15a
• Fuse 40a
• Fuse 50a
• G102 (front of left fender)
• G109 (front of right fender)
• G203 (behind right kick panel)
• G204 (behind right kick panel)
• Ground
• High
• Hot at all times
• Hot in run
• Hot in start or run
• Ill
• Interior lights system
• Low
• Max a/c a/c
• Med high
• Med low
• Mode switch
• Off
• Pan/floor
• Panel
• Powertrain control module (pcm)
• Pwr
• Red
• S114
• S121
• S123 (in engine control sensor & fuel charge wiring harness, near breakout to powertrain control module (pcm))
• S126
• S207
• Sig rtn 1
• Temperature blend door actuator (behind right side of dash, on top of a/c plenum)
• Thermal limiter
• Var spd
• Vref