AIR CONDITIONING

(behind right kick panel) g201
(in hvac harness, approximately 45 cm from c321)
(in i/p harness, approximately 14 cm from sp200) s353
A/c
A/c compressor clutch (at left front of engine, on a/c compressor)
After boil coolant pump
After boil fuse 10a
After boil relay
Blower motor (at right side of hvac)
Blower motor control processor (at bottom of blower motor)
Blower mtr speed ctrl
Cold
Def
Driver air temperature actuator (at left center of hvac module, below mode actuator)
Dry air temp signal
G100 (on engine, at front of left cylinder head)
G114 (3.6l) g100 (4.6l) (3.6l: on front side of left cylinder head) (4.6l: on engine, at front of left cylinder head)
Hot
Hot at all times
Mode actuator (at left side of evaporator, on hvac)
Mode valve signal
Nca
Pass air temp signal
Passenger air temperature actuator (at right center of dash, on right side of hvac case)
Pnk
R11
R12
R13
R15
Right rear fuse block (near right side of rear seat, under carpet)
S218
S324 (in hvac harness, approximately 50 cm from c322)
Tan
Trailer provisions

(4.6l) serial data
(at left rear of engine compt) g101
(at right front of engine compt) g104
(in engine harness, approximately 35 cm from underhood fuse block) (3.6l) s109
(in fuel injector harness, near in-line connection to engine harness) (3.6l) s108
2700 (or 596)
3.6l 4.6l
4.6l 3.6l
470 (or 452)
5v reference
A/c clutch relay ctrl
A/c refrig press sensor
A/c refrigerant pressure sensor
Ambient air temperature sensor (at front center of engine compt)
Computer data lines system
Coolant level switch (at left rear of engine compt, on coolant tank)
Ect sensor signal
Engine control module (ecm) (at left front corner of engine compartment) (3.6l: at top front of engine)
Engine controls system
Engine coolant temperature (ect) sensor (3.6l: at left side of engine) (4.6l: at rear of right cylinder head)
Hi fuse 30a
Hi speed fan relay
High speed fan relay ctrl
Hot at all times
Left cooling fan (in front of a/c condenser, behind left side of front bumper)
Lo speed fan relay
Low
Low fan fuse 30a
Low ref
Low reference
Low speed fan relay ctrl
Main relay
Main relay ctrl
R14
R15
R16
R18
R19
R20
R21
R22
R39
R40
R41
R42
R47
R48
R49
R50
Right cooling fan (in front of a/c condenser, behind right side of front bumper)
S/p fan relay
S120 (3.6l) (in engine harness, approximately 30 cm from engine control module)
Serial data
Signal
Tan
Underhood fuse block (at right front of engine compartment)

(in body harness, approximately 46 cm from right inflatable restraint roof rail module) s307
(in body harness, approximately 54.5 cm from right inflatable restraint roof rail module)
(in headliner harness, approximately 73.5 cm from right vanity mirror light) s311
(on auxiliary blower motor) auxiliary blower motor resistor assembly
(rear of right rear shock tower on "d" pillar) g401
Auxiliary blower motor (at left rear corner of cargo compt)
Auxiliary blower motor switch
G402 (rear of left rear shock tower on "d" pillar)
High
Hot at all times
Hot in run
Interior lights system
Low
Med
Med high
Off
Primary quarter a/c relay
Rear
Rear auxiliary blower motor switch
Rear auxiliary mode door control
Rear hvac fuse 30a
Right rear fuse block (near right side of rear seat, under carpet)
S308
S406 (in body harness, approximately 38 cm from c314)
S408 (in body harness, approxi- mately 32.5 cm from right rear suspension damper)
Tan

(4.6l) serial data
(in engine harness, approximately 35 cm from underhood fuse block) (3.6l) s109
2700 (or 596)
4.6l 3.6l
470 (or 452)
5v reference
A/c clutch relay ctrl
A/c compressor clutch (at left front of engine, on a/c compressor)
A/c refrig press sens sig
A/c refrigerant pressure sensor
Cmp clu relay
Comp clutch fuse 10a
Computer data lines system
E10
Engine control module (ecm) (at left front corner of engine compartment) (3.6l: at top front of engine)
Engine controls system
G114 (3.6l) g110 (4.6l) (3.6l: on front side of left cylinder head) (4.6l: in engine compartment, on right frame rail)
Hot at all times
Hot in run or start
Hvac control module (at center of dash, below radio)
Low reference
Nca
R55
R56
R57
R58
S108 (3.6l) (in fuel injector harness, near in-line connection to engine harness)
Serial data
Tan
Underhood fuse block (at right front of engine compartment)

AIR CONDITIONING – Cadillac SRX 2005 – SYSTEM WIRING DIAGRAMS