AIR CONDITIONING – Buick Century Custom 1999 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

3.1L

3.1L VIN M, Automatic A/C Wiring Diagram (1 of 2) for Buick Century Custom 1999

List of elements for 3.1L VIN M, Automatic A/C Wiring Diagram (1 of 2) for Buick Century Custom 1999:

• (i/p harn, 34 cm from heater-a/c control breakout)
• (i/p harn, 4 cm from radio breakout)
• (i/p harness, 18 cm from radio breakout)
• (i/p harness, 4 cm from breakout to radio)
• (right side of dash) g200
• (right side of steering column) sp205
• +5 v
• A/c sol ctrl
• A/c solenoid
• Ambient outside temperature sensor (behind front panel, mounted to radiator air baffle)
• Battery
• Bi-lev sol ctrl
• Bi-level solenoid
• Blower motor
• Blower motor control module (behind dash, right of heater-a/c control)
• C 1995 vftc
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Cntrl in
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of dash, right of steering column)
• Def sol ctrl
• Defrost solenoid
• Fuse block
• G200 (right side of dash)
• Grd
• Ground
• Heater solenoid
• Heater-a/c control
• High blower fuse 25a
• Hot at all times
• Hot in run
• Htr sol ctrl
• Hvac fuse 10a
• Ignition
• Inside air temperature sensor (right side of instrument cluster)
• Inside temp input
• Left electric actuator (left side of heater- a/c module)
• Lt elec actuator
• Motor drive
• Nca
• Outside temp input
• Radio,hvac fuse 15a
• Rear defog enable
• Rear defogger system
• Recirc sol ctrl
• Recirc solenoid
• Red
• Right electric actuator (right side of heater- a/c module)
• Rt elec actuator
• S202 (i/p harness, right of steering column)
• S230
• S231
• S233
• S258
• Sensor ground
• Serial data
• Solid state
• Spd cntrl
• Sun load input
• Sun load temperature sensor (top left of dash)
• Tan
• Vacuum/ electric solenoid (on right side of heater-a/c module)
• Volt to blw ctrl

3.1L VIN M, Automatic A/C Wiring Diagram (2 of 2) for Buick Century Custom 1999

List of elements for 3.1L VIN M, Automatic A/C Wiring Diagram (2 of 2) for Buick Century Custom 1999:

• (engine harn, 13 cm from engine coolant fan 1 breakout)
• A/c clu diode
• A/c clu fuse 10a
• A/c clu relay
• A/c compressor clutch
• A10
• A11
• C 1995 vftc
• C11
• Comp ctrl
• Cool fan 1 maxi fuse 25a
• Cool fan 1 relay
• Cool fan 2 maxi fuse 15a
• Cool fan 2 relay
• Cool fan 3 relay
• Engine coolant fan motor 1
• Engine coolant fan motor 2
• F12
• G117 (3.1l) (left front of engine) g113 (3.8l) (left front of engine)
• Hi spd ctrl
• Hot at all times
• Ign main relay (closed in run, bulb test or start)
• Low spd ctrl
• Powertrain control module (left front side of engine compt, in air cleaner assembly)
• S105
• Serial data
• Underhood accessory wiring junction block

3.1L VIN M, Compressor Wiring Diagram for Buick Century Custom 1999

List of elements for 3.1L VIN M, Compressor Wiring Diagram for Buick Century Custom 1999:

• (auto a/c)
• (manual a/c)
• (manual a/c) c2
• A/c clu diode
• A/c clu fuse 10a
• A/c clu relay
• A/c compressor clutch
• A/c compressor relay control
• A/c reqest
• A/c request signal
• Breakout)
• C11
• D12 (auto a/c)
• Fuse block
• G117 (3.1l left front of engine) g113 (3.8l left front of engine)
• Heater- a/c control
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Hvac fuse 10a
• Ign main relay
• Ignition
• Pcm-bcm fuse 10a
• Pnk
• Powertrain control module (left front side of eng compt, in air cleaner assembly)
• S106 (engine harn, 7 cm from pcm breakout)
• S233 (i/p harn, 4 cm from radio breakout)
• Serial data
• Sp205 (right side of steering column)
• Underhood accessory wiring junction block

3.1L VIN M, Manual A/C Wiring Diagram for Buick Century Custom 1999

List of elements for 3.1L VIN M, Manual A/C Wiring Diagram for Buick Century Custom 1999:

• (i/p harn, 4 cm from radio breakout) s233
• A/c compressor clutch
• A/c clu diode
• A/c clu fuse 10a
• A/c clu relay
• A/c request sig
• A/c solenoid
• A10
• A11
• Bi-level solenoid
• Blower motor
• Blower motor relay
• Blower motor resistor
• Blower sw out
• C11
• Clutch req
• Comp ctrl
• Cool fan 1 maxi fuse 40a
• Cool fan 1 relay
• Cool fan 2 maxi fuse 30a
• Cool fan 2 relay
• Cool fan 3 relay
• Defogger on
• Defogger system
• Defrost solenoid
• Engine coolant fan motor 1 (lh)
• Engine coolant fan motor 2 (rh)
• F12
• Fuse block
• G117 (left front of engine)
• G200 (right side of dash)
• G201 (right side of dash)
• Ground
• Heater solenoid
• Heater-a/c control
• Hi spd ctrl
• High blower fuse 20a
• Hot at all times
• Hot in run
• Hvac fuse 10a
• Ign main relay (closed in run, bulb test or start)
• Ignition
• Interior lights
• Interior lights system
• Lamp dim sig
• Left electronic actuator (left side of heater- a/c module)
• Left temp vlv
• Low blower fuse 20a
• Low spd ctrl
• Nca
• Off
• Powertrain control module (left front side of engine compt, in air cleaner assembly)
• Recirc solenoid
• Red
• Right electronic actuator (w/ cj3) (right side of heater- a/c module)
• Right temp vlv
• S105 (engine harn, 13 cm from engine coolant fan 1 breakout)
• S230 (i/p harn, 18 cm from radio breakout)
• Tan
• Underhood accessory wiring junction block
• Vacuum/ electronic solenoid (right side of heater- a/c module)