AIR CONDITIONING – Mercury Grand Marquis LS 1999 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram for Mercury Grand Marquis LS 1999

List of elements for Automatic A/C Wiring Diagram for Mercury Grand Marquis LS 1999:

• (behind right kick panel, near door sill) g201
• (front of right front fender apron, right side of battery) g102
• (in engine harness, near breakout to in-line connector, left rear corner of engine compartment, rear of wheelwell) s129
• (in main harness, near breakout to day/night amplifier sensor) s226
• (not used)
• (rear center of engine) g106
• 87a
• A/c clutch cycling pressure switch (right rear of engine compartment, on a/c accumulator)
• A/c clutch output
• A/c compressor clutch coil
• A/c high pressure cut out switch (right side of engine compartment, near fuse box)
• A/c wot cutout relay
• Amb temp sens input
• Ambient temperature sensor (center front of vehicle, on front of upper radiator support)
• Battery
• Blend door (cool)
• Blend door (heat)
• Blend door actuator (behind right side of dash, top of a/c plenum)
• Blend door pot gnd
• Blend dr feedback
• Blower motor
• Blower motor speed controller (top right center of firewall, on evaporator assembly)
• Blower mtr output
• Blower speed fback
• C227
• C228
• Circuit breaker 17 30a
• Computer data lines system
• Connector behind right side of dash) s204
• Cooling fan (front of engine compartment)
• Cooling fan high relay
• Cooling fan low relay
• Data
• E/m converter
• Electronic automatic temperature control (eatc) module (behind center of dash)
• Engine compartment fuse box
• Engine compartment fuse box (right front of engine compartment, behind battery)
• Front panel illum
• Fuse 13 50a
• Fuse 15a
• Fuse 30a
• Ground
• High current relay center (right rear of engine compartment)
• Hot at all times
• Hot at all times
• Hot in run
• I/p fuse panel
• In car temp sens
• In-car temperature sensor (behind top center of dash)
• Inst illumination
• Instrument cluster (digital)
• Interior lights system
• Near door sill) g203
• Pcm power relay
• Power
• Powertrain control module (pcm) (behind left side of dash, on left side of firewall)
• Red
• Reference voltage
• Relay center (left side of engine compartment)
• Relay signal
• S116 (in dash panel to headlamp junction harness, near breakout to in-line connector, inside front of right front fender)
• S139
• S157 (in engine harness, near breakout to g102)
• S206 (in main harness, near breakout to glove box lamp)
• S227 (in main harness, in breakout to lighting control module)
• S251 (in main harness, in breakout to eatc)
• Sensor ground
• Sun load sensor (top right side of dash, above glove box)
• Sunload sens input

Manual A/C Wiring Diagram for Mercury Grand Marquis LS 1999

List of elements for Manual A/C Wiring Diagram for Mercury Grand Marquis LS 1999:

• (behind right kick panel, near door sill) g201
• (behind right kick panel, near door sill) g203
• (center rear of engine) g106
• (front of right front fender apron, right side of battery) g102
• (not used)
• 87a
• A/c clutch cycling pressure switch (right rear of engine compartment, on a/c accumulator)
• A/c compressor clutch coil
• A/c high pressure cut out switch (right side of engine compartment, near fuse box)
• A/c wot cutout relay
• A/c-heater mode switch
• Blend door actuator (behind right side of dash, top of a/c plenum)
• Blower motor
• Blower motor resistor assembly (top right center of firewall, on evaporator assembly)
• Blower motor switch
• Circuit breaker 17 30a
• Cold
• Cooling fan (front of engine compartment)
• Cooling fan high relay
• Cooling fan low relay
• Def
• Engine compartment fuse box
• Engine compartment fuse box (right front of engine compartment, behind battery)
• Floor
• Fuse 13 50a
• Fuse 5 15a
• Fuse 9 30a
• High current relay center (right rear of engine compartment)
• Hot at all times
• Hot in run
• I/p fuse panel
• Lamp)
• Max a/c
• Med hi
• Med lo
• Mix
• Norm a/c
• Off
• Pcm power relay
• Powertrain control module (pcm) (behind left side of dash, on left side of firewall)
• Red
• Relay center (left side of engine compartment)
• S116 (in dash panel to headlamp junction harness, near breakout to g102, right side of battery)
• S129 (in engine harness, near breakout to in line connector, left rear corner of engine compartment)
• S139
• S157 (in engine harness, near breakout to a/c compressor clutch coil)
• S206 (in main harness, near breakout to glove box lamp)
• S226 (in main harness, near breakout to day/night sensor amplifier)
• S239 (in main harness, near breakout to in-line connector, right rear of engine compartment)
• Solid state
• Temperature control potentiometer
• Vent
• Warm