AIR CONDITIONING – Saturn L300 2003 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Saturn L300 2003

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Saturn L300 2003:

58

• (in hvac harn) s205
• +5v
• 5v ref
• A/c
• A/c diode
• A/c fuse 10a
• A/c press
• A/c pressure sensor (in a/c high side pressure line)
• A/c relay
• A10
• A12
• Air tmp cntrl
• Amb air temp
• Amb temp dr
• Ambient air temperature sensor (left front of engine compt)
• Ambient light sensor (near base of wind- shield)
• B11
• Battery
• Bcm fuse 10a
• Blower motor (on hvac assembly)
• Blower motor speed control module (on front of hvac assembly)
• Blw mtr spd
• Blwr mtr spd
• Body control module (bcm) (mounted to top of glove box)
• Can high
• Can low
• Compressor clutch
• Computer data lines system
• Controls ign 1 fuse 10a
• Coolant fan 1 fuse 30a
• Coolant fan 2 fuse 30a
• D10
• Eng cntl 1 10a
• Engine control module (ecm) (top right rear of engine)
• Engine controls system
• G110 (on left front of engine)
• G305 (under center console)
• Gnd
• Hot at all times
• Hot in run
• Hot in run or start
• Hvac control module (center of instrument panel, under radio)
• Ign 3 volt
• Left instrument panel fuse block (lipfb) (behind left kick panel)
• Low ref
• Mode actuator (on hvac assembly)
• Mode dr mtr
• Mode dr pos
• Pnk
• Rec dr cntrl
• Recirculation door actuator (on hvac assembly)
• Red
• Serial data
• Spd req sig
• Sunld sen sig
• Tan
• Temperature actuator (on right end of hvac assembly)
• Underhood fuse block (uhfb) (left side of engine compt)

Automatic A/C Wiring Diagram (2 of 2) for Saturn L300 2003

List of elements for Automatic A/C Wiring Diagram (2 of 2) for Saturn L300 2003:

30

• A12
• Battery
• C11
• C12
• Cool fan low ref
• Cool fan mtr med spd
• Cool fan mtr voltage
• Cooling fan 1 (behind radiator)
• Cooling fan 2 (on front of a/c condenser)
• Cooling fan control module (near battery)
• Engine control module (ecm) (top right rear of engine)
• F12
• Fan 1 cntrl
• Fan 2 cntrl
• G104 (under center console)
• G105 (left front of engine compt)
• G304 (left side of engine compt)
• Ground
• Hi spd cool fan sig
• Hot at all times
• Hot in run
• Ign 1 voltage
• Ign 3 relay
• Left instrument panel fuse block (lipfb) (behind left kick panel)
• Low spd cool fan sig
• Pnk
• Red
• Splice pack sp103
• Splice pack sp104
• Underhood fuse block (uhfb) (left side of engine compt)

Compressor Wiring Diagram, with Auto A/C for Saturn L300 2003

List of elements for Compressor Wiring Diagram, with Auto A/C for Saturn L300 2003:

26

• +5v
• A/c compressor clutch
• A/c diode
• A/c fuse 10a
• A/c press
• A/c pressure sensor (in a/c high side pressure line)
• A/c relay
• A10
• A12
• B11
• Body control module (bcm) (mounted to top of glove box)
• Can high
• Can low
• Computer data lines system
• D10
• Eng cntl 1 fuse 10a
• Engine control module (ecm) (top right rear of engine)
• Engine controls system
• G110 (on left front of engine)
• Hot at all times
• Hot in run
• Hvac control module (center of instrument panel, under radio)
• Left instrument panel fuse block (behind left kick panel)
• Return
• Serial data
• Tan

Compressor Wiring Diagram, with Manual A/C for Saturn L300 2003

List of elements for Compressor Wiring Diagram, with Manual A/C for Saturn L300 2003:

36

• +5v
• A/c
• A/c diode
• A/c fuse 10a
• A/c on led
• A/c on/off
• A/c press
• A/c pressure sensor (in a/c high side pressure line)
• A/c relay
• A/c request
• A/c switch
• A10
• A12
• B11
• Body control module (bcm) (mounted to top of glove box)
• C11
• C12
• Can high
• Can low
• Clutch
• D10
• Eng cntl 1 fuse 10a
• Engine control module (ecm) (top right rear of engine)
• Engine controls system
• G104 (under center console)
• G110 (on left front of engine)
• Hot at all times
• Hot in run or start
• Hvac control module (center of instrument panel, under radio)
• Hvac fan switch
• Ign 3 relay (energized in run)
• Left instrument panel fuse block (behind left kick panel)
• Off
• Return
• Splice pack sp104
• Tan

Manual A/C Wiring Diagram (1 of 2) for Saturn L300 2003

List of elements for Manual A/C Wiring Diagram (1 of 2) for Saturn L300 2003:

62

• (top right rear of engine) engine control module (ecm)
• +5v
• A/c comp- ressor clutch
• A/c diode
• A/c fuse 10a
• A/c led
• A/c on/off input
• A/c press
• A/c pressure sensor (in a/c high side pressure line)
• A/c relay
• A/c request input
• A/c request output
• A/c switch
• A1 c2
• A10
• A12
• B11
• Blower motor (on hvac assembly)
• Blower motor resistors (right side of hvac module)
• Blower switch
• Body control module (bcm) (mounted to top of glove box)
• C1 d10
• C11 c1
• C12
• Can high
• Can low
• Def
• Def mode input
• Dim illumination
• Eng cntl 1 fuse 10a
• Engine controls system
• Fan 1 ctrl
• Fan 2 ctrl
• Fresh output
• G104 (under center console)
• G110 (on left front of engine)
• G304 (left side of engine compt)
• G305 (under center console)
• Gnd
• Grd
• Hot at all times
• Hot in run
• Hot in run or start
• Hvac control module (center of instrument panel, under radio)
• Ign
• Ign 3 fuse 10a
• Ign 3 relay
• Interior lights system
• Left instrument panel fuse block (lipfb) (behind left kick panel)
• Mode door motor (on hvac module)
• Mode input
• Off
• Pnk
• Recirc indicator
• Recirc on input
• Recirc output
• Recirculation door motor (on hvac assembly)
• Return
• S206 (in hvac harn)
• Splice pack sp104
• Tan
• Vent

Manual A/C Wiring Diagram (2 of 2) for Saturn L300 2003

List of elements for Manual A/C Wiring Diagram (2 of 2) for Saturn L300 2003:

23

• A12
• Battery
• Controls ign 1 fuse 10a
• Cool fan 1 fuse 30a
• Cool fan 2 fuse 30a
• Cool fan low ref
• Cool fan mtr med spd
• Cool fan mtr voltage
• Cooling fan control module (near battery)
• Engine cooling fan 1 (puller) (behind radiator)
• Engine cooling fan 2 (pusher) (on front of a/c condenser)
• F12
• G105
• Ground
• Hi spd cool fan sig
• Hot at all times
• Hot in run or start
• Ign 1 voltage
• Low spd cool fan sig
• Pnk
• Red
• Splice pack sp103
• Underhood fuse block (uhfb) (left side of engine compt)