Разделы схем — 32 (всего 71)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY CONTROL MODULES COMPUTER DATA LINES COOLING FAN CRUISE CONTROL DEFOGGERS ELECTRONIC POWER STEERING ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS MEMORY SYSTEMS NAVIGATION POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER SEATS POWER TOP/SUNROOF POWER WINDOWS RADIO SHIFT INTERLOCK STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION TRUNK, TAILGATE, FUEL DOOR WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Automatic A/C Wiring Diagram (1 of 3) for Cadillac CTS 2003 List of elements for Automatic A/C Wiring Diagram (1 of 3) for Cadillac CTS 2003: 75 5 volt reference After boil pump relay ctrl Air inlet motor Amb air temp sensor sig Ambient light sensor signal Battery Blower fuse 40a Blower mtor speed ctrl Blower relay Blower relay ctrl Ccp fuse 10a Comp clutch fuse 10a Comp clutch relay Coolant level switch signal Door a Door b Dr air temp door ctrl b Driver air temp door ctrl a Driver air temp posit signal E10 E11 E12 E13 E14 E15 E16 Evap low temp sens signal Evaporator temperature sensor F10 F11 F12 F13 F14 F15 F16 G201 (in passenger compartment, behind right kick pad) Ground Hot at all times Hot in run Hvac control module (behind center of dash, below radio) Ign 3 fuse 10a Ignition 3 voltage Inside air temp sensor sig Inside air temperature sensor Left rear fuse block (below left rear seat) Left sunload sensor signal Low reference Mode door ctrl a Mode door ctrl b Mode door position signal Nca Pass air temp door ctrl a Pass air temp door ctrl b Pass air temp posit signal Pnk R51 R52 R53 R54 R55 R56 R57 R58 Recirc door ctrl a Recirc door ctrl b Recirculation actuator (on hvac module module, left of blower motor) Red Right sunload sensor signal S117 Serial data Solid state Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat) Sunload sensor (at front center of passenger compartment, on defroster grill) Underhood fuse block (at left front of engine compartment) Volt Automatic A/C Wiring Diagram (2 of 3) for Cadillac CTS 2003 List of elements for Automatic A/C Wiring Diagram (2 of 3) for Cadillac CTS 2003: 42 (in engine harness, approximately 235 cm (98.3 in) from knock sensor 1 connector) (in passenger compartment, behind right kick pad) g201 2 (or 4) 4 (or 2) A/c A/c compressor clutch (on front of a/c compressor) Accessory After boil coolant pump (in engine compartment, on right side of engine block) After boil fuse 10a After boil relay Blower motor (in passenger compartment, on right side of hvac module) Blower motor control processor (in passenger compartment, on lower left side of blower motor) Blower mtr speed ctrl Cold Crank Def Driver's air temperature actuator (in passenger compartment, on hvac module) Dry air temp signal G100 (in engine compartment, on engine block near starter motor) Hot Hot at all times Ignition switch Mix motor Mode actuator Mode actuator (in passenger compartment, on hvac module) Mode valve signal Nca Off/lock Pass air temp signal Passenger's air temperature actuator (in passenger compartment, on hvac module) Pnk R11 R12 R13 R15 Red Right rear fuse block (below right rear seat) Run S118 S323 Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Splice pack sp203 (in passenger compartment, under left side of dash trim pad) Automatic A/C Wiring Diagram (3 of 3) for Cadillac CTS 2003 List of elements for Automatic A/C Wiring Diagram (3 of 3) for Cadillac CTS 2003: 50 (in engine compartment, near left front strut tower at bottom of inside fender well) g101 (in engine compartment, on engine block near starter motor) g100 (on right front corner of vehicle, on right body rail near right headlamp) g104 5v reference 87a A/c clutch relay ctrl A/c refrig press sensor A/c refrigerant pressure sensor (in engine compartment, near left front stut tower) Coolant bypass solenoid (at upper right corner of radiator) Coolant level switch (in left front corner of coolant surge tank) Ect sensor signal Engine control module (ecm) (at right front corner of engine compartment) Engine coolant low level Engine coolant temperature sensor (on top rear of intake manifold) Feed Hi speed fan relay High (or hi) fuse 30a High speed fan relay ctrl Hot at all times Hot in on or start Htr/vlv/cltch fuse 10a Left cooling fan (at front of engine compartment, in left side of fan assembly) Lo speed fan relay Low Low fan fuse 30a Low reference Low speed fan relay ctrl Main relay Main relay ctrl Outside ambient air temperature sensor (under front bumper, near front grille) Pnk R39 R40 R41 R42 R47 R48 R49 R50 Radio Right cooling fan (at front of engine compartment, in right side of fan assembly) Rtn S/p fan relay S111 (in engine harness, approximately 120 cm (31.5 in) from ho2s bank 2 sensor 1) Serial data Sig Signal Splice pack sp102 (in right front corner of engine compartment, in front of underhood fuse block Tan Underhood fuse block (at left front of engine compartment) Compressor Wiring Diagram for Cadillac CTS 2003 List of elements for Compressor Wiring Diagram for Cadillac CTS 2003: 31 (in engine compartment, on engine block near starter motor) g100 5v reference A/c clutch relay ctrl A/c compressor clutch (on front of a/c compressor) A/c refrig press sens sig A/c refrigerant pressure sensor (in engine compartment, near left front strut tower) Accessory Comp clutch fuse 10a Comp clutch relay Crank Engine control module (ecm) (at right front corner of engine compartment) Feed Hot at all times Hvac control module Ignition switch Low reference Nca Off/lock Pnk R55 R56 R57 R58 Return Run Serial data Sig Splice pack sp102 (in right front corner of engine compartment, in front of underhood fuse block) Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Tan Underhood fuse block (at left front of engine compartment)
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Cadillac CTS 2003: 50 (in body harness approx. 80 cm (31.4 in) from vcim connector) s300 (in body harness, approx. 60 cm (23.3 in from p400) s301 (in body harness, approx. 95 cm (37.4 in) from audio amplifier connector) s306 (in engine compartment, on right frame rail, near abs module) g110 (not used) 140 cm (55.1 in) from audio amplifier connector) s302 5 volt reference Abs indicator signal Brake press mod valve sig Brake pump motor Class 2 serial data Delivered torque signal Ebcm fuse 50a Edc control Electronic brake control module (ebcm) (at right front corner of engine compartment) Electronic power steering system Engine control module (ecm) (in right front corner of engine compartment) Ground High effort control Hot at all times Lateral accelerometer Left front wheel speed sensor (on inside of hub) Left rear wheel speed sensor (on inside of hub) Lf wheel speed sensor-low ref Lf wheel speed sensor-signal Low effort control Low reference Lr wheel speed sensor-low ref Lr wheel speed sensor-signal Pump motor ground Pwm output torque deliver Requested torque signal Rf wheel speed sensor-low ref Rf wheel speed sensor-signal Right front wheel speed sensor (on inside of hub) Right rear wheel speed sensor (on inside of hub) Rr wheel speed sensor-low ref Rr wheel speed sensor-signal Splice pack sp102 (in right front corner of engine compartment, in front of underhood fuse block) Splice pack sp200 (above steering column) Steering wheel pos signal a Steering wheel pos switch b Stop lamp switch (in left front of passenger compartment, near top of brake pedal) Stop lamp switch signal Stop lp fuse 20a Tan Traction control data signal Underhood fuse block (in right front corner of engine compartment) Vent tube Yaw rate sensor signal Anti-lock Brakes Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Cadillac CTS 2003: 41 (in engine harness, approximately 120 cm (47.2 in) from generator connector) (in passenger compartment, behind right kick pad) g201 5v refer- ence 5v reference A/t A11 A12 Abs indicator Brake fluid pressure sensor (in right front corner of engine compartment, on rear of brake pressure modulator valve) Class 2 serial data Computer data lines system Dash integration module (dim) (under right side of dash, above right closeout/insulator panel) E10 Ebcm fuse 10a Electronic prndl Hot in run Hvac control module (on center of dash, below radio) Instrument panel cluster (ipc) Lateral accelerometer sensor (in passenger compartment, under center console behind sdm) Lateral sensor signal Left rear fuse block (in passenger compartment, under left side of rear seat) Logic Press Radio Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel) S100 (in engine harness, approximately 80 cm (31.5 in) from brake fluid pressure sensor connector) S101 Splice pack sp200 (above steering column) Splice pack sp203 (under left side of i/p trim pad) Splice pack sp303 (behind passenger's seat, near right rear fuse block) Sport mode Sport mode switch signal Steering wheel position sensor (in passenger compartment, at base of steering column) Steering wheel position signal a Steering wheel position signal b Traction control switch Winter mode Winter mode switch signal Yaw rate sens signal Yaw rate sensor (in passenger compartment, on left side of rear shelf) Yaw rate sensor signal
ANTI-THEFT Anti-theft Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Anti-theft Wiring Diagram (1 of 2) for Cadillac CTS 2003: 58 (behind left kick panel) g200 A11 A12 Accessory voltage Alarm on signal Armed signal B10 Battery C (not used) Class 2 serial data Control pwr output Dash integration module (dim) (in passenger compartment, under right side of i/p above right closeout/ insulator panel) Door open Door open switch signal Driver door latch assembly (at rear of left front door) Driver door module (ddm) (in left front door, under door trim panel) Ecm/tcm fuse 10a Exterior lights system F (not used) Ground Horn relay ctrl Horns system Hot at all times Hot in acc or run Hot in run or start Ign 1 voltage Ignition key Intrusion sensor (at rear of passenger compartment, on center of headliner) Left rear door latch assembly (at rear of left rear door) Left rear door module (lrdm) (on left rear door, under door trim panel) Left rear fuse block (below left rear seat) Nca Park lamp relay ctrl Pnk R31 R32 R33 R35 Reader/ exciter Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel) Right rear door latch assembly (at rear of right rear door) Right rear door module (rrdm) (on right rear door, under door trim panel) Right rear fuse block (below right rear seat) Rim fuse 10a S121 S313 (in headliner harness, approximately 115 cm (45.6 in) from c311) Splice pack sp201 (behind ignition switch, near hvac module) Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat) Splice pack sp303 (in passenger compartment, behind passenger's seat near right rear fuse block) Tan Theft deterrent control module (at top of steering column) Theft fuse 7.5a Transponder Trunk ajar switch signal Trunk dr rel sol relay Trunk dr release fuse 10a Trunk release relay ctrl Underhood fuse block (at right front corner of engine compartment) Anti-theft Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Anti-theft Wiring Diagram (2 of 2) for Cadillac CTS 2003: 25 (in rear compartment to rear of left rear shock tower) g402 B10 Class 2 serial data Data link connector (dlc) (partial) (in passenger compartment, under i/p, next to hood release lever) Door open Door open sw sig E10 Electronic brake control module (ebcm) (at right front corner of engine compartment) Engine control module (ecm) (in right front corner of engine compartment) Front passenger door module (fpdm) (on right front door, under door trim panel) Gnd Ground Hvac control module (in passenger compartment, on center of i/p below radio) Ign Instrument panel cluster (ipc) Logic Passenger door latch assembly (at rear of right front door) Radio Rear compartment lid release actuator (on center rear of rear compartment lid) S317 Security indicator Splice pack sp200 (in right front of passenger compartment, under i/p, above steering column) Splice pack sp201 (behind ignition switch, near hvac module) Splice pack sp300 (in passenger compartment, on left frame rail, near left side of driver's seat) Trunk ajar switch signal
BODY CONTROL MODULES Dash Integration Module Wiring Diagram for Cadillac CTS 2003 List of elements for Dash Integration Module Wiring Diagram for Cadillac CTS 2003: 69 (in passenger compartment, behind right kick pad) g201 5 volt reference A10 A11 A12 Accessory Accessory voltage B10 B11 B12 Backlight lamps control Battery Cigar relay Cigar relay coil voltage Class 2 serial data Computer data lines system Control power output Courtesy lamp switch on signal Crank Dash integration module (dim) (in passenger compartment, under right side of i/p above right closeout/insulator panel) Dim/ aldl fuse 10a Drl relay ctrl Exterior lights system Flash to pass switch signal Fog lamp relay control Front fog lamps switch signal G200 (in passenger compartment, behind left kick pad) Ground Ground distribution system Hazard switch output Hazard switch signal Headlamp hi beam relay ctrl Headlamp switch on signal Headlamp washer ground Headlights system Hi/low beam relay ctrl Horn relay control Horns system Hot at all times Ignition 1 voltage Ignition lock cyl switch Ignition switch Inst panel lp dimmer sw low ref Inst panel lp dimmer switch Interior lights system Key in ignition switch signal Lic/dimming fuse 15a Off/lock Park lamp relay Park lamp relay ctrl Pnk R31 R32 R33 R34 R59 R62 Run Shift interlock system Splice pack sp200 (in right front of passenger compartment, under i/p, above steering column) Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Tan Twilight sentinal delay signal Underhood fuse block (in engine compartment, in right front corner) Voltage check fuse 10a Warnings system Washer fluid level signal Wiper switch on signal Wiper/washer system Rear Integration Module Wiring Diagram for Cadillac CTS 2003 List of elements for Rear Integration Module Wiring Diagram for Cadillac CTS 2003: 47 5007 (or 5053) A10 A11 A12 Anti-lock brakes system B10 B11 B12 Battery Class 2 serial data Computer data lines system Courtesy lamp control Courtesy lamp ctrl Defogger system Driver heated seat high/low signal Exterior lights system G401 (in rear compartment to rear of right rear shock tower) Ground Hot at all times Hot in on or start Htd seat ctrl module status signal Ignition 1 voltage Interior lights system Pass htd seat ctrl module status signal Passenger heated seat high/low signal Pnk Power distribution system Power tops system Rap relay coil control Rear defog relay ctrl Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel) Reverse relay ctrl Reverse signal (or winter mode signal) Right rear fuse block (in passenger compartment, under right side of rear seat) Rim fuse 10a Rim fuse 15a Seats system Shift interlock system Splice pack sp302 (in passenger compartment, on left frame rail near left side of driver's seat) Sport mode switch signal Tan Traction control switch signal Transmissions system Trunk ajar switch ctrl Trunk release relay ctrl Trunk, tailgate, fuel doors system Vehicle speed signal
COMPUTER DATA LINES Computer Data Lines Wiring Diagram for Cadillac CTS 2003 List of elements for Computer Data Lines Wiring Diagram for Cadillac CTS 2003: 48 (in engine harness, approximately 160 cm (62.9 in) from ecm ground) s114 (in passenger compartment, behind left kick pad) g200 A/t A11 A12 A22 A23 Audio amplifier (in left rear compartment, behind left strut tower) B11 Base Bose Can serial bus + Can serial bus - Class 2 serial data D14 Dash integration module (dim) (under right side of dash above right closeout/ insulator panel) Data link connector (dlc) (in passenger compartment, under dash next to hood release lever) Digital radio receiver Dim/aldl fuse 10a Driver door module (ddm) (on left door, under door trim panel) Driver door switch assembly (ddsa) E10 Electronic brake control module (ebcm) (at right front corner of engine compartment) Engine control module (ecm) (in right front corner of engine compartment) Front passenger door module (fpdm) (on right front door, under door trim panel) Hot at all times Hvac control module (in passenger compartment, on center of dash below radio) If equipped Inflatable restraint sensing & diagnostic module (sdm) (at center of passenger compartment floor, under console) Instrument panel cluster (ipc) Key word 2000 serial data Left rear door module (lrdm) (on left rear door, under door trim panel) M/t Memory seat module (msm) (in passenger's compartment, under driver's seat) Radio Radio antenna module (in rear of passenger compartment, above headliner near rear window) Rear integration module (rim) (under package shelf trim panel) Right rear door module (rrdm) (in center rear of passenger compartment, under package shelf trim panel) Splice pack sp200 (under dash, above steering column) Splice pack sp201 (behind ignition switch near hvac module) Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Splice pack sp203 (in passenger compartment, under left side of dash trim pad) Splice pack sp300 (in passenger compartment, on left frame rail, near left side of driver's seat) Splice pack sp303 (behind passenger's seat, near right rear fuse block) Theft deterrent control module (at top of steering column) Transmission control module (tcm) (a/t) (in right front corner of engine compartment) Underhood fuse block (in right front corner of engine compartment) Vehicle communication interface module (vcim) (in rear compartment, behind right strut tower)
COOLING FAN Cooling Fan Wiring Diagram for Cadillac CTS 2003 List of elements for Cooling Fan Wiring Diagram for Cadillac CTS 2003: 53 (in engine compartment on engine block near starter motor) g100 (in engine compartment, near left front strut tower at bottom of inside fender well) g101 (in engine compartment, on engine block near starter motor) g100 (on right front corner of vehicle, on right body rail near right headlamp) g104 87a After boil coolant pump (in engine compartment, on right side of engine block) After boil fuse 10a After boil relay Coolant by-pass solenoid (at upper right corner of radiator) Coolant level sw Coolant level switch (in left front corner of coolant surge tank) E10 E11 Ect sensor signal Engine control module (ecm) (at right front corner of engine compartment) Engine coolant low level Engine coolant temperature sensor (on top rear of intake manifold) Hi speed fan relay High fan fuse 30a High speed fan relay ctrl Hot at all times Hot in on or start Htr/vlv/cltch fuse 10a Hvac control module Left cooling fan (at front of engine compartment, in left side of fan assembly) Lo speed fan relay Low fan fuse 30a Low reference Low speed fan relay ctrl Main relay Main relay ctrl Pnk R11 R12 R13 R15 R39 R40 R41 R42 R47 R48 R49 R50 Radio Relay control Right cooling fan (at front of engine compartment, in right side of fan assembly) Right rear fuse block (below right rear seat) S/p fan relay S111 (in engine harness, approximately 120 cm (31.5 in) from ho2s bank 2 sensor 1) Serial data Tan Underhood fuse block (at left front of engine compartment)
CRUISE CONTROL Cruise Control Wiring Diagram for Cadillac CTS 2003 List of elements for Cruise Control Wiring Diagram for Cadillac CTS 2003: 47 (in passenger compartment, behind left kick pad) g200 (on right front corner of vehicle, on right body rail near right headlamp) g104 A/t C202 C4 (or c5) Center steering wheel control switch Clutch pedal position switch (in passenger compartment, under dash, on clutch pedal) Cpp switch signal Cruise control switch signal Cruise on led Cruise switch Engine control module (ecm) (in right front corner of engine compartment) Extended travel brake switch (opens when brake pedal is depressed) Extended travel brake switch signal Hot at all times Hot in run Hot in run or crank Htr vlv/ cltch fuse 10a Ign 1 relay Inflatable restraint steering wheel module coil M/t Off Pnk Power distribution system R43 R44 R45 R46 R63 R66 Resume/ accel S118 (in engine harness, approximately 235 cm (98.3 in) from knock sensor 1 connector) Set/ coast Splice pack sp200 (in right front of passenger compartment, under dash above steering column) Splice pack sp203 (in passenger compartment, under left side of dash trim pad) Starter relay Starter relay coil ctrl Starter relay coil voltage Strng ctrls fuse 10a Switch fuse 2a Tcc brake switch/ cruise control release switch Tcc brake switch/cruise release sig Tcc/brake switch/ cruise control release signal Tcc/cruise control release switch (in left front of passenger compartment, near top of brake pedal) Tcc/et fuse 10a Transmission control module (tcm) (in right front corner of engine compartment) Underhood fuse block (in right front corner of engine compartment)
DEFOGGERS Defoggers Wiring Diagram for Cadillac CTS 2003 List of elements for Defoggers Wiring Diagram for Cadillac CTS 2003: 27 (on package shelf, to left of subwoofer) g304 607 (or 628) A12 Class 2 serial data Computer data lines system Driver door module (ddm) (on left front door, under door trim panel) Driver outside mirror Feed Front passenger door module (fpdm) (on right front door, under door trim panel) Heated motor element Hot at all times Hot in run or start Hvac control module Logic Low reference Nca Passenger outside mirror R10 Rear defog fuse 40a Rear defog relay Rear defogger Rear defogger indicator Rear defogger switch Rear integration module (rim) (under package shelf trim panel) Relay control Right rear fuse block (under right side of rear seat) Rtn
ELECTRONIC POWER STEERING Electronic Power Steering Wiring Diagram for Cadillac CTS 2003 List of elements for Electronic Power Steering Wiring Diagram for Cadillac CTS 2003: 12 (in engine compartment, on right frame rail, near abs module) g110 Class 2 serial data Computer data lines system Ebcm fuse 10a Electronic brake control module (ebcm) (at right front corner of engine compartment) Ground High effort control Hot in run Ignition Left rear fuse block (in passenger compartment, under left side of rear seat) Low effort control Variable effort steering actuator (in engine compartment, on power steering gear input shaft)
ENGINE PERFORMANCE
3.2L VIN N 3.2L VIN N, Engine Performance Wiring Diagram (1 of 3) for Cadillac CTS 2003 List of elements for 3.2L VIN N, Engine Performance Wiring Diagram (1 of 3) for Cadillac CTS 2003: 71 (in engine harness, 120 cm from ho2s 21) (in fuel injector harness, near c112) (left rear of intake plenum) intake manifold runner control solenoid (near ignition coils) +5v ref Case ground Ckp hi Ckp low Cmp sig Coil 1 ctrl Coil 2 ctrl Coil 3 ctrl Coil 4 ctrl Coil 5 ctrl Coil 6 ctrl Cpp sw sig Crankshaft position sensor Cruise control system Ect sens Electronic ignition module (bank 1) Electronic ignition module (bank 2) Engine control module (front of right valve cover) Evap purge Fuel inj 1 Fuel inj 2 Fuel inj 4 Fuel inj 5 Fuel inj 6 Fuel injectors G100 (near starter motor) G107 Heated oxygen sensor bank 1 sensor 1 (on right exhaust pipe) Heated oxygen sensor bank 1 sensor 2 (on right catalytic converter) Heated oxygen sensor bank 2 sensor 1 (on left exhaust pipe) Heated oxygen sensor bank 2 sensor 2 (on left catalytic converter) Ho2s 1,1 htr Ho2s 1,1 low Ho2s 1,1 sig Ho2s 1,2 hi Ho2s 1,2 htr Ho2s 1,2 lo Ho2s 2,1 htr Ho2s 2,1 low Ho2s 2,1 sig Ho2s 2,2 hi Ho2s 2,2 htr Ho2s 2,2 lo Iat sig Inj 3 ctrl Intk out 1 Intk out 2 Knock sensor (bank 1) (right side of engine) Knock sensor (bank 2) (left side of engine) Ks1 sig Ks2 sig Lo ref Low ref Maf sig Mass airflow sensor (right side of air cleaner) Nca Oil pres sig Pnk S108 pnk S111 Shld ground Tac mtr ctrl Tan Tan/red To spark plugs Tps sens 1 Tps sens 2 3.2L VIN N, Engine Performance Wiring Diagram (2 of 3) for Cadillac CTS 2003 List of elements for 3.2L VIN N, Engine Performance Wiring Diagram (2 of 3) for Cadillac CTS 2003: 48 (in engine harness, 120 cm from ho2s 21) (in front of underhood fuse box) Camshaft position sensor (left front of engine) Canister vent fuse 10a Ecm fuse 15a Ecm/tcm fuse 10a Engine coolant temperature sensor (top rear of intake manifold) Engine oil pressure sensor (aboe oil filter) Evap canister purge solenoid (right side of engine) Fuel pump relay Fuse a 15a G100 (near starter motor) G104 (near right head- lamp) G401 (rear of right shock tower) Hot at all times Hot in run or start Ign 1 relay Ign mod fuse 15a Inj fuse 10a Intake manifold tuning valve solenoid (rear side of intake duct) Main relay Manifold fuse 10a Pnk Post 02 fuse 15a Pre fuse 15a R36 R37 R38 R40 R43 R44 R45 R46 R47 R48 R49 R50 Right rear fuse block (below right rear seat) S112 Sp102 Tan Tcc/ cruise release switch Tcc/et fuse 10a Tcm/ ipc fuse 15a Theft fuse 7.5a Throttle position sensor (top right front of engine) Under- hood fuse block (left front of eng compt) Vehicle speed sensor (m/t) (near rear of transmission assembly) 3.2L VIN N, Engine Performance Wiring Diagram (3 of 3) for Cadillac CTS 2003 List of elements for 3.2L VIN N, Engine Performance Wiring Diagram (3 of 3) for Cadillac CTS 2003: 87 (engine harn, 160 cm from ecm ground) (in front of underhood fuse box) sp102 (in rear compt lid harn, 237 cm from c401) +5v ref 1786 (or 1035) 2000 ser dat A/c pres A/c rly ctrl A/c system A/t Acc Acc volt Accelerator pedal Anti-lock brakes system App 2 sig App sens1 Automatic transmission manual shift shaft switch assembly Battery Can bus + Can bus - Charging system Class 2 data Computer data lines system Cooling fans system Crank Cruise control system Data bus Data link connector (under left side of dash) Del tor sig Eng spd sig Engine control module (front of right valve cover) Engine speed Evap canister vent solenoid (above rear differential) Evap ctrl Ext brk sig F lev sig Fuel lev sns Fuel level sensor Fuel pump/ sender assembly Fuel tank pressure sensor (in fuel tank) G100 (near starter motor) G401 (rear of right shock tower) Gen on sig Gen signal Gmlan data Hot at all times Ign 1 Ign 1 volt Ign voltage Ignition switch Instrument panel cluster Logic Low red Low ref M/t Main rly ctrl Malfunction indicator lamp Mil ctrl Off/ lock P/n sig Pnk Position sensor (above accelerator pedal) Req torq Res/accel Rly coil ctrl Rly ctrl Run S114 S400 Secondary fuel sender assembly Ser data Sp102 (in front of underhood fuse box) Sp202 (near ipc) Start Starting system Stop lamp switch (top of brake pedal) Stop lp sw fuse 15a Stp lp sw Tan Tcc brk sw Tcc/brk Tnk pres sig Trac ctrl Transmission control module (right front side of engine compt) Under- hood fuse block (left front of eng compt) Vss Vss signal
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Cadillac CTS 2003 List of elements for Back-up Lamps Wiring Diagram for Cadillac CTS 2003: 23 (in engine compartment, on engine block near starter motor) g100 (in rear compartment, to rear of left rear shock tower) g402 A12 C421 Computer data lines system Hot at all times Inside rearview mirror (isrvm) Left back up lamp Left rear fuse block (below left rear seat) M/t R36 R37 R38 R40 Rear integration module (rim) (under package shelf trim panel) Relay control Rev lamp relay Reverse lamp fuse 10a Reverse lamp switch (near shift control assembly) Reverse sw signal Right back up lamp S401 Serial data Exterior Lamps Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Cadillac CTS 2003: 57 (in forward lamp harness, approximately 10 cm (3.2 in) from horn assembly) s115 (in passenger compartment, behind left kick pad) g200 (in rear compartment to rear of left rear shock tower) g402 (on right front corner of vehicle, on right body rail near right headlamp) g104 A11 A12 Auto Battery Computer data lines system Control power output Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel) Drl relay control Drl relay ctrl Ground Hazard sw signal switch Hazard switch Hazard switch output Hazard switch signal Hdlp Headlamp sw on signal Headlamp switch Hot at all times Left front park lamp Left front park/turn signal lamp Left front side marker lamp Left front turn signal Left front turn/drl out Left license lamp Left rear turn lamp Left turn signal voltage Lic/dimming fuse 15a Lt park fuse 10a Off Panel lamp voltage Park lamp relay Park lamp relay ctrl Park lamp sw on signal Pnk R31 R32 R33 R34 Right front park/turn signal lamp Right front turn signal Right front turn voltage Right front turn/drl out Right license lamp Right rear turn lamp S119 S401 S402 Serial data Splice pack sp202 (in passenger compartment, under dash trim pad, near instrument panel cluster (ipc)) Splice pack sp203 (in passenger compartment, under left side of dash trim pad) To underhood fuse block (rt park fuse, 10a) (diagram 2 of 2) Turn signal hazard flasher module (in left front of passenger compartment, under dash) Underhood fuse block (at left front of engine compartment) Exterior Lamps Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Cadillac CTS 2003: 39 (in rear compartment to rear of left rear shock tower) g402 (in rear compartment to rear of right rear shock tower) g401 (in rear compartment, to rear of left rear shock tower) g402 (on right front corner of vehicle, on right body rail near right headlamp) g104 Center high mounted stop lamp (chmsl) Computer data lines system E10 Electronic brake control module (ebcm) (at right front corner of engine compartment) Engine control module (ecm) (at right front corner of engine compartment) Flasher fuse 15a From underhood fuse block (lt park fuse, 10a) (diagram 1 of 2) Hot at all times Hot in run or crank Hvac control module (behind center of dash, below radio) Instrument panel cluster (ipc) Left rear side marker lamp Left rear tail/stop lamp Left turn indicator Lights on indicator Pnk Radio Right front park lamp Right front side marker lamp Right rear side marker lamp Right rear tail/stop lamp Right turn indicator Rt park fuse 10a S315 S316 S318 S401 S402 Serial data Splice pack sp200 (in right front of passenger compartment, under dash, above steering column) Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat) Stop lamp switch (near top of brake pedal) Stop lp sw fuse 15a Strg ctrls fuse 10a Underhood fuse block (at left front of engine compartment)
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 4) for Cadillac CTS 2003 List of elements for Ground Distribution Wiring Diagram (1 of 4) for Cadillac CTS 2003: 37 (in engine compartment, on engine block, near generator) g102 (in engine compartment, on engine near ignition coils) g107 (in engine compartment, on right frame rail, near abs module) g110 (in passenger compartment, on package shelf to left of subwoofer) g304 (in passenger compartment, on right side rear pillar) g303 (in passenger compartment, under center console) g306 (in right side of engine compartment, on inner fender wall, near battery) g105 (no connection) A/c compressor clutch switch A/t A32 After boil coolant pump Automatic transmission B12 Battery Brake fluid level switch Coolant by-pass solenoid Coolant level switch Dash integration module (dim) Electronic brake control module (ebcm) Engine control module (ecm) G100 (in engine compartment, on engine block near starter motor) G101 (in engine compartment, near left front strut tower, at bottom of inside fender well) Headlamp washer fluid pump Ignition control module (icm) bank 1 Ignition control module (icm) bank 2 Inflatable restraint sensing & diagnostic module (sdm) M/t Rear window defogger Reverse switch Transmission control module (tcm) Vehicle speed sensor (vss) W/o high pressure headlamp washer Washer fluid level switch Windshield washer fluid pump Windshield wiper/ washer module With/ high pressure headlamp washer Ground Distribution Wiring Diagram (2 of 4) for Cadillac CTS 2003 List of elements for Ground Distribution Wiring Diagram (2 of 4) for Cadillac CTS 2003: 42 (at left front of engine compartment) fuse block - underhood (w/hid) left headlamp (w/hid) right headlamp A/t Accessory relay Auxiliary cooling fan Auxiliary power outlet B12 Blower motor control processor Cigar lighter Coil Cont- acts Electronic prndl Front passenger door module (fpdm) G104 (on right front corner of vehicle, on right body rail near right headlamp) G201 (in passenger compartment, behind right kick pad) Headlamp leveling sensor-front Horn assembly Hvac control module Ign 1 relay Left cooling fan Left fog lamp Left headlamp Left side marker lamp Left turn signal lamp M/t R16 R35 R46 Right fog lamp Right headlamp Right rear door module (rrdm) Right side marker lamp Right turn signal lamp S/p fan relay S308 Splice pack sp203 (in passenger compartment, under left side of dash trim pad) Traction control switch Trailer provisions W/automatic headlamps control leveling system W/o automatic headlamps control leveling system W/o hid Ground Distribution Wiring Diagram (3 of 4) for Cadillac CTS 2003 List of elements for Ground Distribution Wiring Diagram (3 of 4) for Cadillac CTS 2003: 34 (in passenger compartment, to left to driver's seat, on left frame rail) g307 B12 Connector) Dash integration module (dim) Data link connector (dlc) (partial) Driver door module (ddm) Driver heated seat module Driver seat adjuster switch G200 (in passenger compartment, behind left kick pad) Hazard switch Headlamp switch Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Key-in ignition switch Left rear door module (lrdm) Memory seat module (msm) Nca Passenger heated seat module Passenger seat adjuster switch S119 S120 S121 S305 (in body harness, approximately 180 cm (70.8 in) from left rear fuse block) S307 (in left seat harness, approximately 381 cm (150 in) from seat belt switch) S320 (in right seat harness, approximately 235 cm (92.5 in) from a 14 pin connector under front passenger's seat) Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Splice pack sp203 (in passenger compartment, under left side of i/p trim pad) Steering wheel controls- center Steering wheel controls- left Steering wheel controls- right Theft deterrent control module Turn/ hazard flasher module W/8-way adjuster power passenger seat, front heater seat) W/o 8-way adjuster power passenger seat, front heater seat) Ground Distribution Wiring Diagram (4 of 4) for Cadillac CTS 2003 List of elements for Ground Distribution Wiring Diagram (4 of 4) for Cadillac CTS 2003: 42 (below left rear seat) left rear fuse block (below right rear seat) right rear fuse block Audio amplifier Avec system, am/fm radio, mcd, dvd, navigation & tv B11 Center high mounted stop lamp (chmsl) Coil Fuel pump & sender assembly Fuel pump relay G401 (in rear compartment, to rear of right rear shock tower) G402 (in rear compartment, to rear of left rear shock tower) If equipped Ign 1 relay Ign 3 relay Inside rearview mirror (isrvm) Left backup lamp Left license lamp Left vanity lamp Left- tail lamp Nca Overhead console courtesy lamp R21 R25 R36 Radio Rear compartment lid release actuator Rear integration module (rim) Right backup lamp Right license lamp Right vanity lamp Right- tail lamp S314 (in headliner harness, approximately 125 cm (49.8 in) from 2 pin connector, near radio antenna module) S401 Splice pack sp300 (in passenger compartment, near left side of driver's seat) Sunroof control switch Sunroof module Traffic information receiver Tv antenna module Vehicle communication interface module (vcim) W/avec system, am/fm radio, icdx, cd rom, navigation, tv, mcd & dvd W/o avec system, am/fm radio, icdx, cd rom, navigation, tv, mcd & dvd W/vehicle communication system, gps1
HEADLIGHTS Headlights Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Headlights Wiring Diagram (1 of 2) for Cadillac CTS 2003: 56 (in passenger compartment, behind left kick pad) g200 (on right front corner of vehicle, on right body rail near right headlamp) g104 A11 A12 Auto Battery Class 2 serial data Computer data lines system Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel) Drl relay control Drl relay ctrl Flash to pass signal Flasher fuse 15a Fog lamp fuse 15a Fog lamp relay ctrl Fog lamp switch signal Fog lp relay Front fog lamp switch Ftp Ground Hazard signal switch Hazard switch Hazard switch output Hazard switch signal Head Headlamp on signal Headlamp relay control Headlamp switch Hi beam relay control High Hot at all times Hot in run or crank Ign 1 voltage Left fog lamp Left front turn signal Left front turn/drl out Left turn signal switch signal Left turn- signal Low Low beam relay control Off Park Pnk Right fog lamp Right front turn signal Right front turn/drl out Right turn signal switch signal Right turn- signal S119 Splice pack sp203 (in passenger compartment, under left side of i/p trim pad) Splice pack sp301 (in passenger compartment, near right side of passenger's seat) Strg cntrls fuse 10a Turn signal switch Turn/hazard flasher module (in left front of passenger compartment, under dash) Twilight sentinal display Underhood fuse block (at left front of engine compartment) Headlights Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Headlights Wiring Diagram (2 of 2) for Cadillac CTS 2003: 45 (on right front corner of vehicle, on right body rail near right headlamp) g104 Ambient light sensor Ambient light sensor sig Ballast Class 2 serial data Data link connector (dlc) (partial) (in passenger compartment, under i/p next to hood release lever) E10 Electronic brake control module (ebcm) (at right front corner of engine compartment) Engine control module (ecm) (at right front corner of engine compartment) F13 F15 Hi beam Hi beam relay Hid lo bm Hot at all times Hvac control module (in passenger compartment, on center of i/p below radio) Instrument panel cluster (ipc) Left headlamp Left headlamp (w/hid) Lo beam Lo beam relay Low reference Lt hi beam fuse 10a Lt low beam fuse 20a Nca R23 R24 R25 R26 R27 R28 R29 R30 Radio Right headlamp Right headlamp (w/hid) Rt hi beam fuse 10a Rt low beam fuse 20a Splice pack sp200 (at right front of passenger compartment under i/p, above steering column) Splice pack sp201 (at right front corner of engine compartment) Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat) Sunload sensor assembly (in front center of passenger compartment on defroster grille) Underhood fuse block (in right front corner of engine compartment) W/high intensity discharge headlamps W/o high intensity discharge headlamps
HORN Horn Wiring Diagram for Cadillac CTS 2003 List of elements for Horn Wiring Diagram for Cadillac CTS 2003: 20 (on right front corner of vehicle, on right body rail near right headlamp) g104 1995 vftc c C203 Dash integration module (dim) (under right side of dash, above right closeout/insulator panel) Fuse 2a High note horn Horn assembly (in left front corner of vehicle, behind front fascia) Horn fuse 15a Horn pan Horn relay Horn relay control Hot at all times Low note horn Nca R10 R11 R12 R13 Tan Underhood fuse block (on right front corner of engine compartment)
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Cadillac CTS 2003: 65 (early production) clock (in passenger compartment, behind left kick pad) g200 (not used) Abs ind signal Abs indicator Backlighting Backlighting control Battery Brake indicator Charge indicator Class 2 (dim) Class 2 (ebcm) Class 2 (ecm) Class 2 (rim) Class 2 (sdm) Clock control Computer data lines system Cruise indicator Ecm/tcm fuse 10a Electronic brake control module (ebcm) (at right front corner of engine compartment) Engine coolant temperature indicator Engine speed signal Exterior lights system Fasten safety belt indicator Front fog lamps indicator Fuel level Ground High beam indicator Hot at all times Hot in run or start Ignition 1 voltage Instrument panel cluster (ipc) Interior lights system Ipc Led dimming signal Left turn indicator Lights on indicator Logic Low engine oil pressure indicator Park brake switch signal Pnk Right turn indicator Security indicator Serial data Service engine soon (early production) mil indicator (late production) Sir indicator Speedometer Speedometer control Splice pack sp200 (in right front of passenger compartment, under dash, above steering column) Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Sport mode indicator Tachometer Tachometer control Tcm/ipc fuse 15a Temperature Tpm indicator (not used) Trac off indicator (early production) traction control off indicator (late production) Trip reset Trip reset switch signal Trip/ odometer Trip/odometer control Underhood fuse block (at left front of engine compartment) Vehicle speed signal Wait to start indicator (not used) Winter mode indicator Instrument Cluster Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Cadillac CTS 2003: 42 (in engine compartment, near left front strut tower, at bottom of inside fender well) g101 (in engine harness, aproximately 120 cm from ho2s bank 2 sensor 1) (in rear compartment to rear of left rear shock tower) g402 2.7 ohms Brake fluid level switch (at rear of engine compartment, on brake fluid reservoir) Class 2 serial data Computer data lines system Driver information center (dic) switch E10 Ect sensor signal Eng/ met Engine compartment module (ecm) (at right front corner of engine compartment) Engine coolant temperature (ect) sensor (on top rear of intake manifold) Engine oil pressure (eop) switch (on front left side of engine, above oil filter) Engine speed signal English/ metric signal Fuel info Fuel info signal Fuel level sensor Fuel pump & sensor assembly (in fuel tank) Gage info Gage info signal Hvac control module (behind center of dash, below radio) If equipped Ign Low reference Mil control Odo/ trip Odometer/ trip signal Ohms Oil press signal Park brake switch (on park brake assembly) Radio Reset Reset signal S111 S400 (in rear compartment lid harness, approximately 237 cm from c401) Secondary fuel sender assembly (under vehicle, in fuel tank) Serial data Splice pack sp202 (in passenger compartment, under dash trim pad, near ipc) Tan Vehicle speed signal
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram for Cadillac CTS 2003 List of elements for Courtesy Lamps Wiring Diagram for Cadillac CTS 2003: 50 (in rear compartment, to rear of left rear shock tower) g402 125 cm from c311) s314 2,000 ohms 40,000 ohms 5v courtesy lamps on signal 5v reference A10 B10 Backlight lamps control Courtesy lamp ctrl Courtesy lp ctrl Courtesy lp relay ctrl Courtesy lp voltage Courtesy lps on signal Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel) Dimmer sw low reference G402 (in rear compartment, to rear of left rear shock tower) Hot at all times I/p lamps dimmer switch Int lamp relay Interior lamp fuse 10a Left courtesy lamp Left footwell courtesy lamp Left front courtesy lamp Left sunshade Left vanity lamps Nca Overhead console courtesy lamp R16 R17 R18 R20 Rear compartment courtesy lamp Rear dome lamp Rear integration module (rim) (under package shelf trim panel) Right courtesy lamp Right footwell courtesy lamp Right front courtesy lamp Right rear fuse block (below right rear seat) Right sunshade Right vanity lamps S311 (in headliner harness, approximately 100 cm from c311) S312 S314 (in headliner harness, approximately 125 cm from c311) S314 (in headliner harness, approximately 125 cm from from c311) S319 Splice pack sp301 (in passenger compartment, on right frame rail, near right side of passenger's seat) Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat) Sunroof control switch Trunk ajar sw signal Instrument Illumination Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Cadillac CTS 2003: 51 (in passenger compartment, behind left kick pad) g200 (in rear compartment, to rear of left rear shock tower) g402 2,000 ohms 40,000 ohms 5 volt reference A11 A12 B11 Backlight lamps ctrl Backlights lamp ctrl Battery Computer data lines system Control power output Courtesy lps on signal Dash integration module (dim) (under right side of dash, above right closeout/insulator panel) Dim/ aldl fuse 10a Dimmer switch signal Driver door lock switch Driver door module (ddm) (on left door, under door trim) Driver door switch assembly (ddsa) Driver dr mod fuse 10a Electronic prndl G201 (in passenger compartment, behind right kick pad) Ground Hot at all times Illumination lamp Inc dim Instrument panel cluster (ipc) Led dimming signal Left rear fuse block (below left rear seat) Lic/dimming fuse 15a Low reference Memory seat switch Overhead console courtesy lamp Park i/p switch Park lamp relay Pnk Psgr dr mod fuse 10a R31 R32 R33 R34 Rear dr mod fuse 10a Right rear fuse block (below right rear seat) S308 S314 (in headliner harness, approximately 125 cm (49.8 in) from c311) S501 (in left front door trim harness, approximately 70 cm from driver window/door lock switch) Serial data Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat) Sunroof control switch Underhood fuse block (at left front of engine compartment) Instrument Illumination Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Cadillac CTS 2003: 41 (in headliner harness, approximately 110 cm from c311) s312 (in left rear door trim harness, approximately 160 cm from c701) s701 (in passenger compartment, behind left kick pad) g200 (in passenger compartment, behind right kick pad) g201 (in right front door trim harness, approximately 70 cm from driver window/door lock switch) s600 (in right rear door trim harness, approximately 160 cm from c801) s801 70 cm from driver window/ door lock switch) s600 70 cm from front passenger window switch) s601 A12 Backlight lamps ctrl Battery Computer data lines system Cruise "on" indicator' Front passenger door lock switch Front passenger door module (fpdm) (on right front door, under door trim panel) Front passenger window switch Fuse 2a G200 (in passenger compartment, behind left kick pad) Gnd Hazard switch Illumi- nation lamp Inflatable restraint steering wheel module coil Left rear door module (lrdm) (under door trim panel) Left rear door window switch Left steering wheel controls Nca Off R/a Right rear door module (rrdm) (on right rear door, under door trim panel) Right rear door window switch Right steering wheel controls S/c S119 S120 S314 S315 Serial data Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Splice pack sp203 (in passenger compartment, under left side of dash trim pad) Steering cloumn fuse holder Steering wheel controls center
MEMORY SYSTEMS Memory Mirrors Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Memory Mirrors Wiring Diagram (1 of 2) for Cadillac CTS 2003: 48 5v feed 5v reference 5v rtn A12 B11 B12 Backlight lamps control Battery Class 2 serial data Computer data lines system Driver door module (ddm) (on left front door, under door trim panel) Driver door switch module (ddsm) (driver door switch assembly (ddsa)) Driver dr mod fuse 10a Driver outside rearview mirror Exit (ext) G200 (in passenger compartment, behind left kick pad) Gnd Ground Ground rtn Horiz motor Horiz pos sensor Horiz posit sensor Hot at all times Interior lights system Left Left horiz Left rear fuse block (under left side of rear seat) Logic Low reference Memory 1 switch signal Memory 2 switch signal Memory/personalization function switch (memory seat switch) Mirror mtr down ctrl Mirror mtr left ctrl Mirror mtr right ctrl Mirror mtr up ctrl Mirror switches Nca Right Right horiz S501 (or s502) (in left front door trim harness, approximately 70 cm (27.3 in) from driver window/door lock switch (or ddsa)) Sel left Sel right Vert down Vert motor Vert pos sensor Vert up Vertical posit sensor Memory Mirrors Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Memory Mirrors Wiring Diagram (2 of 2) for Cadillac CTS 2003: 32 (in body harness, approximately 255 cm (100.5 in) from sp303) s303 (in passenger compartment, behind right kick pad) g201 5v feed 5v reference 5v rtn A12 B12 Battery Class 2 serial data Computer data lines system Dr mod pwr c/b 30a Front passenger door module (fpdm) (on right front door, under door trim panel) Ground Horiz motor Horiz pos sensor Horizontal posit sensor Hot at all times Left horiz Low reference Mirror mtr down ctrl Mirror mtr left ctrl Mirror mtr right ctrl Mirror mtr up ctrl Passenger outside rearview mirror Psgr dr mod fuse 10a Right horiz Right rear fuse block (under right side of rear seat) Vert down Vert motor Vert pos sensor Vert up Vertical posit sensor Memory Seat Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Memory Seat Wiring Diagram (1 of 2) for Cadillac CTS 2003: 56 (in body harness, approximately 555 cm (218.5 in) from c700) s304 (in left seat harness, approximately 10 cm (3.2 in) from driver seat horizontal position sensor) s348 5 volt reference Battery positive voltage Class 2 serial data Driver seat adjuster switch E10 E11 E12 E13 E14 E15 E16 F10 F11 F12 F13 F14 F15 F16 Front vertical down Front vertical motor down control Front vertical motor up control Front vertical up G307 (to left of driver's seat, on left frame rail) Ground Horizontal forward Horizontal forward switch signal Horizontal motor forward ctrl Horizontal motor rearward control Horizontal rearward Horizontal rearward switch signal Hot at all times Left rear fuse block (under left side of rear seat) Low reference Mem/adapt seat fuse 10a Memory seat module (msm) (in passenger compartment, under driver's seat) Rear vertical down Rear vertical motor down control Rear vertical motor up control Rear vertical posit sens signal Rear vertical up Recline back switch signal Recline forward Recline forward switch signal Recline motor forward control Recline motor rearward control Recline posit sens signal Recline rearward S320 (in right seat harness, approximately 235 cm (92.5 in) from c307) Seat horiz posit sensor signal Seats circuit breaker 30a Tan Vertical down switch signal Vertical posit sens signal Vertical up switch signal Memory Seat Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Memory Seat Wiring Diagram (2 of 2) for Cadillac CTS 2003: 27 (under driver's seat) driver seat front vertical motor (under driver's seat) driver seat horizontal motor (under driver's seat) driver seat rear vertical motor (under driver's seat) driver seat recline motor Backlight lamps control Class 2 serial data Driver door module (ddm) (on left front door, under door trim panel) Driver door switch assembly (ddsa) Driver seat front vertical position sensor (under driver's seat) Driver seat horizontal position sensor (under driver's seat) Driver seat rear vertical position sensor (under driver's seat) Driver seat recline position sensor (under driver's seat) Exit (ext) Gnd Ground Interior lights system Memory 1 sw signal Memory 1 switch signal Memory 2 sw signal Memory 2 switch signal Memory/personalization function switch (memory seat switch) Nca S348 (in left seat harness, approximately 10 cm (3.2 in) from driver seat horizontal position sensor) S349 (in left seat harness, approximately 150 cm (59.2 in) from driver seat rear vertical position sensor) S502 (in left front door trim harness, approximately 70 cm (27.3 in) from ddsa) Splice pack sp300 (on left frame rail, near left side of driver's seat) Tan
NAVIGATION Navigation Wiring Diagram for Cadillac CTS 2003 List of elements for Navigation Wiring Diagram for Cadillac CTS 2003: 29 (coaxial cable) Audio amplifier (in left of rear compartment, behind left stut tower) Audio fuse 10a Bare Battery Class 2 serial data Computer data lines system Drain wire G303 (on right side rear pillar) G402 (in rear compartment, to rear of left rear shock tower) Gps antenna Ground Hot at all times Left rear fuse block (under left side of rear seat) Mic out feed Mic out return Nav voice in (+) Nav voice out (-) Navigation voice low ref Navigation voice signal Nca Phone antenna Pnk Radio S309 Vehicle communication interface module (vcim) (in rear compartment, behind right strut tower) Voice output (+) Voice output (-) Voice output ground
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 7) for Cadillac CTS 2003 List of elements for Power Distribution Wiring Diagram (1 of 7) for Cadillac CTS 2003: 66 (at left front of engine compartment) underhood fuse block (in engine harness, approximately 200 cm (78.5 in) from ho2s bank 1 sensor 1) s112 (in fuel injector harness, near 7 cavity in-line connector, engine to fuel injector harness, at rear of intake manifold) s108 A/t A12 Air conditioning & cooling fans systems Air conditioning system Battery Blower fuse 40a Blower relay Ccp fuse 10a Coil Dash integration module (dim) Data link connector (dlc) (partial) Dim/ aldl fuse 10a Ebcm fuse 50a Ecm/tcm fuse 10a Electronic brake control module (ebcm) Engine control module (ecm) Engine control module (ecm) (at right front corner of engine compartment) Evaporative emissions (evap) canister purge valve solenoid Flasher fuse 15a Fuel injector Generator Heated oxygen sensor (ho2s) bank 1 sensor 2 Heated oxygen sensor (ho2s) bank 2 sensor 2 Hi fan fuse 30a Hi speed fan relay Hvac control module Inj fuse 10a Instrument panel cluster (ipc) Intake manifold runner control (imrc) solenoid Intake manifold tuning valve (imtv) solenoid Left rear fuse block (below left rear seat) Lo (or low fan) fuse 30a Lo speed fan relay Main relay Main relay control Manifold fuse 10a Mass air flow (maf) sensor Pnk Post 02 fuse 10a Pusher fan relay R14 R19 R20 R39 R40 R47 R48 R49 R50 R51 R52 Red S/p fan relay Spare fuse Starter Stop lamp switch Stop lp sw fuse 15a (or 20a) Theft deterrent module To underhood fuse block (ecm fuse, 15a) (diagram 3 of 7) To underhood fuse block (horn relay) (diagram 2 of 7) Transmission control module (tcm) Turn/ hazard flasher module Volt check fuse 10a Power Distribution Wiring Diagram (2 of 7) for Cadillac CTS 2003 List of elements for Power Distribution Wiring Diagram (2 of 7) for Cadillac CTS 2003: 60 (at left front of engine compartment) underhood fuse block (on right front corner of vehicle, on right body rail near right headlamp) g104 A/t Accessory relay Air conditioning system Comp (clu) clutch relay Comp clutch fuse 10a Drl relay Early production before vin number Elec prndl fuse 10a Electronic prndl Engine control module (ecm) Exterior lights system Fog lamp fuse 15a Fog lamp relay From ignition switch (via splice pack sp200, pin 21) (diagram 4 of 7) From underhood fuse block a (main relay) (diagram 1 of 7) Hdlp wash circuit breaker 30a Hdlp washer relay Headlamp washer relay Headlights system High (hi) beam relay Horn fuse 15a Horn relay Horns system Ign sw fuse 10a Jumper wire L rear fuse 60a Late production vin 105858 & after Lo beam relay/ hid Park lamp relay R rear fuse 60a R10 R11 R24 R28 R30 R32 R35 R36 R37 R56 R67 R68 Red Spare fuse Theft deterrent control module Theft fuse 7.5a To ignition switch (pin 6) (diagram 4 of 7) To left rear fuse block (driver dr mod fuse, 10a) (diagram 5 of 7) To left rear fuse block (l position relay) (diagram 5 of 7) To right rear fuse block (dr mod pwr circuit breaker, 30a) (diagram 6 of 7) To right rear fuse block (rim fuse, 10a) (diagram 4 of 7) To underhood fuse block (cigar relay) (diagram 3 of 7) Transmission control module (tcm) Windshield wiper/ washer module Windshield wiper/ washer switch Wiper/ washer system Wpr mod fuse 30a Wpr sw fuse 10a Power Distribution Wiring Diagram (3 of 7) for Cadillac CTS 2003 List of elements for Power Distribution Wiring Diagram (3 of 7) for Cadillac CTS 2003: 55 (accessory relay) (diagram 2 of 7) (in passenger compartment, behind right kick pad) g201 (on right front corner of vehicle, on right body rail near right headlamp) g104 A/t Auxiliary power outlet B+ mode Battery saver mode Camshaft position (cmp) sensor Cigar lighter Cigar relay Clutch pedal position (cpp) sensor (m/t) Coil Comp clutch relay Coolant bypass valve Dash integration module (dim) (under right side of dash, above right closeout/insulator panel) Ecm fuse 15a Engine control module (ecm) Fog lamp relay From ignition switch (via splice pack sp201 (pin 8) (diagram 4 of 7) From underhood fuse block (manifold fuse, 10a) (diagram 1 of 7) From underhood fuse block h Heated oxygen sensor (ho2s) bank 1 sensor 1 Heated oxygen sensor (ho2s) bank 2 sensor 1 Htr vlv/ cltch fuse 10a I/p outlet fuse 20a Ign 1 relay Instrument panel cluster (ipc) M/t Outlet fuse 30a Pnk Pre 02 fuse 10a R43 R44 R45 R46 R55 R59 R60 R61 R62 R63 R64 S308 (a/t) Splice pack sp 102 (in front of underhood fuse block) Splice pack sp200 (above steering column) Splice pack sp203 (in passenger compartment, under left side of dash trim pad) Starter fuse 30a Starter relay Starting/charging system Tcc/clutch release switch Tcc/et fuse 10a Tcm/ipc fuse 15a To underhood fuse block (wash noz fuse 10a, (diagram 4 of 7) Transmission control module (tcm) Underhood fuse block (at left front of engine compartment) Power Distribution Wiring Diagram (4 of 7) for Cadillac CTS 2003 List of elements for Power Distribution Wiring Diagram (4 of 7) for Cadillac CTS 2003: 49 (not used) A11 Accessory Battery C202 Center steering wheel control switch Coil Crank Crank voltage Dash integration module (dim) (under right side of dash, above right closeout/insulator panel) Engine control module (ecm) (at right front corner of engine compartment) From underhood fuse block (ign sw fuse, 10a) (diagram 2 of 7) From underhood fuse block (r rear fuse, 60a) (connector c3, pin 1) (diagram 2 of 7) From underhood fuse block (tcc/et fuse, 10a) (diagram 3 of 7) Headlamp switch Ign mod fuse 15a Ignition 1 Ignition coil bank 1 Ignition coil bank 2 Ignition lock cylinder control actuator Ignition switch Inflatable restraint steering wheel module coil Left headlamp Left heated washer nozzle Nca Off/lock Pnk Rear defog relay Red Right headlamp Right heated washer nozzle Right rear fuse block (below right rear seat) Rim fuse 10a Run S200 S318 Spare fuse Splice pack sp200 (in right front of passenger compartment, under dash, above steering column) Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat) Strg ctrls fuse 10a Switch fuse 2a To left rear fuse block (ign 3 relay) (diagram 6 of 7) To right rear fuse block (ign 1 relay) (diagram 7 of 7) To underhood fuse block (accessory relay) (connector c4, pin c7) (diagram 2 of 7) To underhood fuse block (comp clutch relay) (diagram 3 of 7) Underhood fuse block (at left front of engine compartment) W/heated windshield washer nozzle Wash noz fuse 10a Power Distribution Wiring Diagram (5 of 7) for Cadillac CTS 2003 List of elements for Power Distribution Wiring Diagram (5 of 7) for Cadillac CTS 2003: 49 (below left rear seat) left rear fuse block (not used) A12 Amp fuse 30a Audio amplifier Audio fuse 10a (or 15a) Driver door module (ddm) Driver dr mod fuse 10a Driver power seat switch Driver seat heated seat module Exterior lights system F11 From underhood fuse block (l rear fuse, 60a) (connector c2, pin 1) (diagram 2 of 7) From underhood fuse block (l rear fuse, 60a) (connector c2, pin 2) (diagram 2 of 7) L frt htd seat mod fuse 10a L position relay Left rear door module (lrdm) Left rear fuse block (ign 3 relay) (diagram 6 of 7) Mem/adapt seat fuse 10a Memory seat module Position lamp fuse 10a R position relay R13 R15 R18 R20 R26 R27 R29 R31 R32 R36 R37 Radio Rear dr mod fuse 15a Red/ (in left seat harness, approximately 10 cm (3.2 in) from driver seat horizontal position sensor) s348 Rev lamp relay Reverse lamp fuse 10a Right rear door module (rrdm) Spare fuse Spare relay Splice pack sp301 (near right side of passenger's seat) Standing lamp relay Trk dr rel sol relay Trunk dr release fuse 10a Trunk, tailgate & fuel door release system Vehicle communication interface module (vcim) W/ 8 speaker system W/o 8 speaker system Power Distribution Wiring Diagram (6 of 7) for Cadillac CTS 2003 List of elements for Power Distribution Wiring Diagram (6 of 7) for Cadillac CTS 2003: 59 (below right rear seat) right rear fuse block (in body harness, approximately 255 cm (100.5 in) from splice pack sp303 behind passenger's seat, near right rear fuse block) s303 (in body harness, approximately 555 cm (218.5 in) from 14 cavity in-line connector, on left rear door jamb, near door hinges) s304 (in rear compartment, to rear of left rear shock tower) g402 (not used) A/t shift lock control solenoid After boil fuse 10a After boil relay Ccp fuse 10a Cooling fans system Dr mod pwr circuit breaker 30a Driver door module (ddm) Driver heated seat module Driver power seat switch Ebcm fuse 10a Electronic brake control module (ebcm) Engine controls system From ignition switch (via splice pack sp302) (diagram 4 of 7) From left rear fuse block (trk dr rel sol relay) (diagram 5 of 7) From underhood fuse block (r rear fuse, 60a) (connector c3, pin 2) (diagram 2 of 7) Fuel pump motor relay Fuel pump mtr fuse 15a Hdlp leveling fuse 10a Hvac control module Ign 3 fuse 10a Ign 3 relay Left rear door module (lrdm) Left rear fuse block (below left rear seat) Memory seat module (msm) Passenger front door module (pfdm) Passenger heated seat module Passenger power seat switch R frt htd seat mod fuse 10a R11 R12 R21 R22 R25 R33 R37 Rap relay Rap relay coil control Rear headlamp leveling sensor Rear integration module (rim) (under package shelf trim pad) Recirculation actuator Red Right front heated seat module Right rear door module (rrdm) Seat circuit breaker 30a Shift control assembly Spare fuse Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat) Sun roof mod fuse 30a Sunroof module (at rear of sun roof assembly, behind) headliner) Tan Trunk lamp fuse W/ 8-way passenger seat power adjuster W/o 8-way passenger seat power adjuster W/sliding electric roof sun glass Power Distribution Wiring Diagram (7 of 7) for Cadillac CTS 2003 List of elements for Power Distribution Wiring Diagram (7 of 7) for Cadillac CTS 2003: 39 (in rear compartment, to rear of right rear shock tower) g401 A12 Canister vent fuse 10a Defogger system Evaporative emissions (evap) canister vent solenoid From ignition switch (via splice pack sp201, pin 9) (diagram 4 of 7) From right rear fuse block (rim fuse, 10a) (diagram 4 of 7) Front passenger door module (fpdm) Ign 1 relay Inflatable restraint sensing & diagnostic module (sdm) Inside rearview mirror Int lamp relay Interior lamp fuse 10a Interior lights system Nav fuse 10a Not used Pgsr dr mod fuse 10a Pnk R16 R17 R21 R22 R23 R25 R26 R27 Rear defog fuse 10a Rear defog relay Rear integration module (rim) Right rear fuse block (below right rear seat) Rim fuse 10a Sir fuse 10a Spare fuse Spare relay Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat) Traffic information receiver Tv antenna module W/avec system, am/fm radio, icdx navigation, cd-rom & tv W/avec system, am/fm radio, mcd, dvd, navigation & tv
POWER DOOR LOCKS Power Door Locks Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Power Door Locks Wiring Diagram (1 of 2) for Cadillac CTS 2003: 51 (in body harness, approximately 255 cm (100.5 in) from splice pack sp303 behind passenger's seat, near right rear fuse block) (in passenger compartment, behind left kick pad) g200 (in passenger compartment, behind right kick pad) g201 115 cm (45.6 in) from c311) A12 B10 B11 B12 Backlight lamps ctrl Battery Class 2 serial data Computer data lines system Door ajar signal Door ajar sw signal Door ajar switch signal Door key sw unlock sig Door key unlock switch signal Door lock mtr lock ctrl Door lock mtr unlk ctrl Door lock sw lock sig Door lock sw unlock sig Door lock switch signal Door open signal Door open switch signal Dr mod pwr cb 30a Driver door latch assembly (at rear of left front door) Driver door module (ddm) (on left front door, under door trim panel) Driver door switch assembly (ddsa) Driver dr key sw signal Driver dr mod fuse 10a Front passenger door module (fpdm) (on right front door, under door trim panel) Gnd Ground Hot at all times Interior lights system Keyless entry antenna signal Left front door sw sig Left rear fuse block (below left rear seat) Memory seat switch Passenger door latch assembly (at rear of right front door) Psgr dr mod fuse 10a Radio antenna module (in rear of passenger compartment, above headliner near rear window) Rear compartment lid release switch Rear dr mod fuse 15a Rear window glass Rfa grid Right rear fuse block (below right rear seat) S303 S501 (or s502) (in left front door trim harness, approximately 70 cm (27.3 in) from driver window/door lock switch or driver door switch assembly (ddsa)) Tan Trunk dr release fuse 10a Power Door Locks Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Power Door Locks Wiring Diagram (2 of 2) for Cadillac CTS 2003: 33 (in left rear door trim harness, approximately 160 cm (62.9 in) from c701) s701 (in passenger compartment, behind left kick pad) g200 (in passenger compartment, behind right kick pad) g201 A12 Ajar B10 B12 Backlight lamp ctrl Backlight lamps control Backlight lamps ctrl Battery Class 2 serial data Computer data lines system Door act lock ctrl Door ajar switch signal Door lock act lock ctrl Door lock act unlk ctrl Door lock unlock ctrl Door open switch signal Driver door lock switch Ground Interior lights system Left rear door latch assembly (at rear of left rear door) Left rear door module (lrdm) (on left rear door, under door trim panel) Lock Open Passenger door lock switch Passenger window switch Right rear door latch assembly (at rear of right rear door) Right rear door module (rrdm) (on right rear door, under door trim panel) S601 (in right front door trim harness, approximately 70 cm (27.3 in) from front passenger window switch) Tan Unlock
POWER MIRRORS Automatic Day/Night Mirror Wiring Diagram for Cadillac CTS 2003 List of elements for Automatic Day/Night Mirror Wiring Diagram for Cadillac CTS 2003: 21 (in rear compartment to rear of left rear shock tower) g402 A12 Backup lamp voltage Class 2 serial data Computer data lines system Ground Hot at all times Ignition voltage Inside rearview mirror (isrvm) (in center front of passenger compartment, on windshield) Left rear fuse block (under left side of rear seat) Pnk R36 R37 R38 R40 Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel) Rev lamp fuse 10a Rev lamp relay Reverse lamp ctrl Right rear fuse block (under right side of rear seat) Rim fuse 10a Power Mirrors Wiring Diagram for Cadillac CTS 2003 List of elements for Power Mirrors Wiring Diagram for Cadillac CTS 2003: 41 A12 B11 B12 Battery Class 2 serial data Computer data lines system Down Dr mod pwr c/b 30a Driver door module (ddm) (on left front door, under door trim panel) Driver door switch module (ddsm) Driver dr mod fuse 10a Driver side outside mirror Front passenger door module (fpdm) (on right front door, under door trim panel) G200 (in passenger compartment, behind left kick pad) G201 (in passenger compartment, behind right kickpad) Ground Ground rtn Horiz motor Hot at all times Left Left mirror mtr-down Left mirror mtr-left Left mirror mtr-right Left mirror mtr-up Left rear fuse block (under left side of rear seat) Logic Mirror switches Nca Passenger outside mirror Psgr dr mod fuse 10a Right Right mirror motor-up Right mirror mtr -down Right mirror mtr-left Right mirror mtr-right Right rear fuse block (under right side of rear seat) S303 (in body harness, approximately 255 cm (100.5 in) from sp303) S501 or s502 (in left front door trim harness, approximately, 70 cm (27.3 in) from ddsa or driver window/door lock switch) Sel left Sel right Vert motor
POWER SEATS Heated Seats Wiring Diagram for Cadillac CTS 2003 List of elements for Heated Seats Wiring Diagram for Cadillac CTS 2003: 41 (in passenger compartment, to left of driver's seat, on left frame rail) g307 A11 A12 Battery Class 2 serial data Computer data lines system Dash integration module (dim) (in passenger compartment, under right side of i/p above right closeout/insulator panel) Driver cushion heated seat element Driver heated seat status Driver high/low signal E10 Front passenger cushion heated seat element Ground Heated seat element control Heated seat element voltage Heated seat high/low signal Heated seat module status sig Heated seat module status signal Heated seat sensor low ref Heated seat temp sens signal Heating element Hot at all times Hot in run Hvac control module (includes heated seat switches) Ign 3 fuse 10a Ignition 3 voltage Left front heated seat module (in passenger compartment, under driver's seat) Left rear fuse block (in passenger compartment, under left side of rear seat) Lt frt htd seat mod fuse 10a Nca Passenger high/low signal Pnk Radio Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim pad) Right front heated seat module (in passenger compartment, under passenger's seat) Right rear fuse block (in passenger compartment, under right side of rear seat) Rt frt htd seat mod fuse 10a Seat temp sensor low ref Seat temp sensor signal Splice pack sp303 (in passenger compartment, behind passenger's seat near right rear fuse block) Thermistor Power Seats Wiring Diagram for Cadillac CTS 2003 List of elements for Power Seats Wiring Diagram for Cadillac CTS 2003: 32 (in passenger compartment, to left of driver's seat, on left frame rail) g307 Aft Approximately 180 cm (70.8 in) from left rear fuse block) s305 Battery Down Driver seat adjust switch Driver seat adjuster motor assembly Driver seat front m vertical motor Driver seat horizontal motor Driver seat rear vertical motor Driver seat recline motor Front vertical down Front vertical up Fwd Gnd Horizontal forward Horizontal rearward Hot at all times Left rear fuse block (in passenger compartment, under left side of rear seat) Passenger seat adjuster motor assembly Passenger seat adjuster switch Passenger seat front vertical motor Passenger seat horizontal motor Passenger seat rear vertical motor Passenger seat recline motor Rear vertical down Rear vertical up Recline forward Recline rearward S304 (in body harness, approximately 555 cm (218.5 in) from c700) Seats circuit breaker 30a Tan
POWER TOP/SUNROOF Sunroof Wiring Diagram for Cadillac CTS 2003 List of elements for Sunroof Wiring Diagram for Cadillac CTS 2003: 41 1995 vftc c G401 (in rear compartment, to rear of right rear shock tower) Ground Hall effect sensor 1 Hall effect sensor 2 Hot at all times Illumination + Illumination - Interior lights system Limit switch Motor + Motor - Nca Pnk Rap relay Rap relay coil ctrl Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel) Right rear fuse block (in passenger compartment, under right side of rear seat) S133 Solid state (close) Solid state (open) Sun roof motor (on left front corner of sunroof module) Sunroof control module (in passenger compartment, behind headliner, at rear of sunroof assembly) Sunroof control switch Sunroof limit switch low reference Sunroof limit switch stop signal Sunroof mod fuse 30a Sunroof motor close control Sunroof motor open control Sunroof obstruction sensor 5vref Sunroof obstruction sensor signal Sunroof switch low reference Sunroof switch-data 1 Sunroof switch-data 2 Sunroof switch-data 3 Sunroof switch-data 4 Sunroof switch-data 5 Sunroof switch-data 6 Sunroof switch-low reference Tan Vehicle speed signal
POWER WINDOWS Power Windows Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Power Windows Wiring Diagram (1 of 2) for Cadillac CTS 2003: 49 (in body harness, approximately 255 cm (100.5 in) from sp303) s303 A12 B11 B12 Backlight lamp control Backlight lamps ctrl Backlights lamps ctrl Battery Class 2 serial data Computer data lines system Door locks system Down Dr mod pwr cb 30a Driver door module (ddm) (on left front door, under door trim panel) Driver door switch module (ddsm) Driver dr mod fuse 10a Driver window motor (in driver door assembly, behind water deflector) Front passenger door module (fpdm) (on right front door, under door trim panel) G200 (in passenger compartment, behind left kick pad) G201 (in passenger compartment, behind right kick pad) Ground Hi speed communication Hi speed communications Hot at all times Interior lights system Left front down control Left front up control Left rear fuse block (under left side of rear seat) Low reference Nca Normal speed comm Normal speed communication Normal speed communications Passenger window motor (in front passenger door assembly, behind water deflector) Passenger window switch Pnk Psgr dr mod fuse 10a Rear dr mod fuse 15a Right front down control Right front down signal Right front express signal Right front pwr wdo dn sig Right front pwr wdo express sig Right front pwr wdo up sig sw Right front up control Right front up signal Right rear fuse block (under right side of rear seat) S501 (in left front door trim harness, approximately 70 cm (27.3 in) from driver window/ door lock switch) S600 (or s601) (in right front door trim harness, approximately 70 cm (27.3 in) from front passenger window switch) Power Windows Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Power Windows Wiring Diagram (2 of 2) for Cadillac CTS 2003: 31 (in left rear door trim harness, approximately 160 cm (62.9 in) from c701) s701 (in passenger compartment, behind left kick pad) g200 (in passenger compartment, behind right kick pad) g201 A12 B12 Backlight lamps ctrl Battery Class 2 serial data Computer data lines system Dim Down Express down G200 (in passenger compartment, behind left kick pad) Gnd Ground Left rear door module (lrdm) (on left rear door, under door trim panel) Left rear window motor (on left rear door assembly, behind water deflector) Left rear window switch Pwr wdo left rear dn ctrl Pwr wdo left rear exp signal Pwr wdo left rear sw down Pwr wdo left rear up ctrl Pwr wdo left rear up signal Pwr wdo mtr right rear down ctrl Pwr wdo right rear dn signal Pwr wdo right rear up ctrl Pwr wdo right rear up signal Pwr wdo sw right rear express sig Right rear door module (rrdm) (on right rear door, under door trim panel) Right rear window motor (in right rear door assembly, behind water deflector) Right rear window switch
RADIO Radio Wiring Diagram, Base (1 of 2) for Cadillac CTS 2003 List of elements for Radio Wiring Diagram, Base (1 of 2) for Cadillac CTS 2003: 46 (in headliner harness, approximately 115 cm (45.6 in) from c311) (in rear compartment, to rear of left rear shock tower) g402 Am/fm antenna signal Amp fuse 30a Antenna signal Audio fuse 15a Battery Class 2 serial data Coaxial cable Computer data lines system Drain Fm composite signal G308 Ground Hot at all times Hot in run or crank Info down switch signal Information up sw signal Instrument cluster system Joint connector Left audio signal (+) Left audio signal (-) Left front door speaker (midrange) Left front upper speaker (tweeter) Left rear fuse block (in passenger compartment, under left side of rear seat) Nca Pnk Radio Radio antenna module (in passenger compartment, above headliner, near rear window) Radio front glass antenna Radio rear glass antenna Rear speaker (subwoofer) Red Remote radio ctrl voltage Return voice in signal Right audio signal (+) Right audio signal (-) S10 S313 Steering wheel ctrls sig Strg ctrls fuse 10a Tan Trunk dr release fuse 10a Underhood fuse block (in engine compartment, in right front corner) Vehicle speed signal Voice in signal Radio Wiring Diagram, Base (2 of 2) for Cadillac CTS 2003 List of elements for Radio Wiring Diagram, Base (2 of 2) for Cadillac CTS 2003: 74 (in headliner harness, approximately 110 cm (39.8 in) from c311) (in passenger compartment, behind left kick pad) g200 (in rear compartment to rear of left rear shock tower) g402 (midrange) left rear door speaker (midrange) right front door speaker (midrange) right rear door speaker (tweeter) right front upper speaker A10 A11 Audio amplifier (in left rear compartment, behind left strut tower) B10 B11 B12 Battery C203 C203 c3 Cellular telephone voice low ref Cellular telephone voice signal Class 2 serial data Computer data lines system Cruise control switch signal Engine control module (ecm) (in engine compartment, in right front corner) Fuse 2a Ground Inflatable restraint steering wheel module coil Interior lights system Left fnt low level audio sig (+) Left fnt low level audio sig (-) Left front midrange spkr out (+) Left front midrange spkr out (-) Left front tweeter spkr out (+) Left front tweeter spkr out (-) Left rear midrange spkr out (+) Left rear midrange spkr out (-) Left subwoofer spkr out (+) Left subwoofer spkr out (-) Low ref Mic out Mic out rtn Mic out shield Nca On/ off Pnk R/a Rdt1 Rdt2 Right fnt low level audio sig (+) Right fnt low level audio sig (-) Right fnt midrange spkr out (+) Right fnt midrange spkr out (-) Right front tweeter spkr out (+) Right front tweeter spkr out (-) Right rear midrange spkr out (+) Right rear midrange spkr out (-) Right subwoofer spkr out (+) Right subwoofer spkr out (-) S/c S119 S312 S318 Splice pack sp203 (in passenger compartment, under left side of i/p trim pad) Steering wheel control pad Steering wheels controls-center Steering wheels controls-left Steering wheels controls-right Sw1 ent Sw2 back Sw3 Sw4 Sw5 Sw6 Tan Vehicle communication interface module (vcim) (in rear compartment, behind right strut tower) Voice signal Radio Wiring Diagram, Luxury (1 of 2) for Cadillac CTS 2003 List of elements for Radio Wiring Diagram, Luxury (1 of 2) for Cadillac CTS 2003: 59 (in headliner harness, approximately 115 cm (45.6 in) from c311) (in rear compartment, to rear of left rear shock tower) g402 Am/fm antenna signal Amp fuse 30a Antenna signal Audio common Audio fuse 15a Battery Class 2 serial data Coaxial cable Computer data lines system Digital radio antenna Digital radio receiver Drain Drain wire Fm composite signal G308 Ground Hot at all times Hot in run or crank Info down switch signal Information up sw signal Instrument cluster system Joint connector Left audio signal (+) Left audio signal (-) Left rear fuse block (in passenger compartment, under left side of rear seat) Nca Noise compensation microphone Pnk Radio Radio antenna module (in rear of passenger compartment, above headliner, near rear window) Radio front glass antenna Radio rear glass antenna Red Remote radio ctrl voltage Return voice in signal Right audio signal (+) Right audio signal (-) Right front door speaker (tweeter) Right front upper speaker (tweeter) S10 S11 S313 Satellite antenna Satellite antenna signal Splice pack sp301 (in passenger compartment, on right frame rail, near right side of passenger's seat) Steering wheel ctrls sig Strg ctrls fuse 10a Tan Terrestrial antenna Terrestrial antenna signal Trunk dr release fuse 10a Underhood fuse block (in engine compartment, in right front corner) Vehicle speed signal Voice in signal Voice output (+) Voice output (-) Voice output ground Radio Wiring Diagram, Luxury (2 of 2) for Cadillac CTS 2003 List of elements for Radio Wiring Diagram, Luxury (2 of 2) for Cadillac CTS 2003: 77 (in headliner harness, approximately 110 cm (39.8 in) from c311) (in passenger compartment, behind left kick pad) g200 (in passenger compartment, on left frame rail, near left side of driver's seat) splice pack sp300 (in rear compartment to rear of left rear shock tower) g402 (midrange) left rear door speaker (subwoofer) rear speaker A10 A11 A12 Audio amplifier (in left rear compartment, behind left strut tower) B10 B11 B12 Battery C203 C203 c3 Cellular telephone voice low ref Cellular telephone voice signal Class 2 serial data Computer data lines system Cruise control switch signal Drain wire Engine control module (ecm) (in engine compartment, in right front corner) Front center speaker out (+) Front center speaker out (-) Front speaker (mid- range) Fuse 2a Ground Inflatable restraint steering wheel module coil Interior lights system Left front door speaker (tweeter) Left front low level signal (+) Left front low level signal (-) Left front tweeter spkr out (+) Left front tweeter spkr out (-) Left front upper speaker (tweeter) Left rear midrange spkr out (+) Left rear midrange spkr out (-) Low ref Mic out Mic out rtn Mic out shield Navigation voice in (+) Navigation voice out (-) Nca Noise compensation micro voltage On/ off Pnk R/a Rdt1 Rdt2 Right front low level signal (+) Right front low level signal (-) Right front tweeter spkr out (+) Right front tweeter spkr out (-) Right rear door speaker (midrange) Right rear midrange spkr out (-) S/c S119 S312 S318 Splice pack sp203 (in passenger compartment, under left side of i/p trim pad) Steering wheel control pad Steering wheels controls-center Steering wheels controls-left Steering wheels controls-right Subwoofer spkr out (+) Subwoofer spkr out (-) Sw1 ent Sw2 back Sw3 Sw4 Sw5 Sw6 Tan Vehicle communication interface module (vcim) (in rear compartment, behind right strut tower) Voice signal
SHIFT INTERLOCK Ignition Lock Solenoid Wiring Diagram for Cadillac CTS 2003 List of elements for Ignition Lock Solenoid Wiring Diagram for Cadillac CTS 2003: 12 A11 A12 Automatic transmission shift lock actuator Class 2 serial data Computer data lines system Dash integration module (dim) (under right side of dash, above right closeout/insulator panel) Hot at all times Ignition lock cyl ctrl Ignition lock cylinder control actuator Right rear fuse block (under right side of rear seat) Rim fuse 10a Tan Shift Interlock Wiring Diagram for Cadillac CTS 2003 List of elements for Shift Interlock Wiring Diagram for Cadillac CTS 2003: 17 (in rear compartment to rear of left rear shock tower) g402 A/t shift lock control solenoid A12 Class 2 serial data Computer data lines system Hot at all times Hot in run Ign 3 fuse 10a Ign 3 relay Left rear fuse block (under left side of rear seat) R21 R22 R23 R25 Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel) Shift control assembly (in center console) Shift lock solenoid control
STARTING/CHARGING Charging Wiring Diagram for Cadillac CTS 2003 List of elements for Charging Wiring Diagram for Cadillac CTS 2003: 21 (in engine compartment, on engine block, near generator) g102 (in right side of engine compartment, on inner fender wall, near battery) g105 Battery Battery (charge) indicator Class 2 ecm Class 2 serial data Computer data lines system Electronic brake control module (ebcm) (at right front corner of engine compartment) Engine control module (ecm) (at right front corner of engine compartment) Gen f term Gen l term Generator Ground distribution system Ign Instrument panel cluster (ipc) Logic Power distribution system Red Serial data class 2 Splice pack sp200 (in right front of passenger compartment, under dash above steering column) Starter Starting Wiring Diagram for Cadillac CTS 2003 List of elements for Starting Wiring Diagram for Cadillac CTS 2003: 40 (in engine compartment on engine block, near generator) g102 (in right side of engine compartment, on inner fender wall, near battery) g105 (on right front corner of vehicle, on right body rail near right headlamp) g104 A/t Accessory Battery Clutch pedal position (cpp) sensor (m/t only) (in passenger compartment, under i/p on clutch pedal) Computer data lines system Cpp switch signal Crank Crank voltage Engine control module (ecm) (in right front corner of engine compartment) Ground distribution system Hot at all times Hot in run Htr vlv/ cltch fuse 10a Ign 1 relay Ignition switch M/t Off/lock Pnk R43 R44 R45 R46 R63 R64 R65 R66 Red Run Serial data Splice pack sp200 (in right front of passenger compartment, under i/p above steering column) Starter Starter fuse 30a Starter relay Starter relay coil ctrl Starter relay coil voltage Starting/ charging system (charging circuit) Underhood fuse block (in right front corner of engine compartment)
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Cadillac CTS 2003: 66 (at left side of dash, near base of "b" pillar) left inflatable restraint side impact sensor (at right side of dash, near base of "b" pillar) right inflatable restraint side impact sensor (in left front seat belt buckle) left seat belt switch (in seat) A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 A33 A34 A35 A36 A37 A38 A39 A40 A41 A42 Case ground Computer data lines system G306 (in passenger compartment, under center console) Ground High control Hot in run or crank Ignition 1 voltage Inflatable restraint sensing & diagnostic module (sdm) (at center of passenger compartment floor, under console) Inflatable restraint steering wheel module (on steering wheel) Inflatable restraint steering wheel module coil Left inflatable restraint roof rail module (above left "b" pillar) Left inflatable restraint side impact module (on left side of left front seat) Left seat belt pretensioner Left seat belt switch Low control Low reference Nca Pnk Right inflatable restraint side impact module (on right side of left front seat) Right rear fuse block (below right rear seat) Sensor signal Sensor voltage Serial data Shorting bar Shorting clip Sir fuse 10a Stage 1 Stage 2 Tan Supplemental Restraints Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Cadillac CTS 2003: 19 Air bag indicator Class 2 (sdm) Computer data lines system Data link connector (dlc) (under left side of dash) Ign Inflatable restraint front end sensor (on upper radiator support) Inflatable restraint i/p module Instrument panel cluster (ipc) Nca Right inflatable restraint roof rail module (above right "b" pillar) Right seat belt pretensioner Serial data Shorting bar Shorting clip Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Splice pack sp300 (in passenger compartment, on left frame rail, near left side of driver's seat) Stage 1 Stage 2 Underhood fuse block (at left front of engine compartment)
TRANSMISSION
3.2L VIN N 3.2L VIN N, A/T Wiring Diagram for Cadillac CTS 2003 List of elements for 3.2L VIN N, A/T Wiring Diagram for Cadillac CTS 2003: 65 (can) + (can) - (on eng block, near starter motor) 1-2 shift sol 1-2 shift sol vlv 2-3 shift sol 2-3 shift sol vlv 4-5 shift sol 4-5 shift sol vlv A/t iss hi sig A/t iss lo sig Acc volt Battery Data link connector (dlc) (partial) (under left side of dash) Ecm/tcm fuse 10a Engine control module (ecm) (at right front corner of engine compt) G100 G100 (on eng block, near starter motor) G104 (near right head- lamp) Ground Hot at all times Hot in run or start Ign 1 relay Ign volt Oss sens high Oss sens low P/n P/n sig Pc sol vlv hi ctrl Pc sol vlv lo ctrl Pnk Pressure control solenoid R43 R44 R45 R46 Red S114 (in engine harn, approximately 160 cm from ecm ground) S118 (in body harn, approximately 235 cm from knock sensor 1 connector) Ser data Ser data (can) + Ser data (can) - Serial data Sol pwr feed Tcc brake sw sig Tcc sol valve Tcc sol vlv ctrl Tcc sw Tcc/ cruise release switch Tcc/et fuse 10a Tcm/ ipc fuse 15a Tft sens lo ref Tft sens sig Theft fuse 7.5a Transmission Transmission control module (tcm) (at right front side of engine compt) Transmission fluid temperature sensor Transmission input shaft speed sensor Transmission manual shift shaft switch assembly Transmission output shaft speed sensor Trs sig a Trs sig b Trs sig c Trs sig p Under- hood fuse block (left front of eng compt) 3.2L VIN N, M/T Wiring Diagram for Cadillac CTS 2003 List of elements for 3.2L VIN N, M/T Wiring Diagram for Cadillac CTS 2003: 38 (in front of under- hood fuse block) (under dash, above steering column) sp200 Ccp switch Class 2 data Clutch pedal position switch (on clutch pedal bracket) Computer data lines system Engine control module (ecm) (at right front corner of engine compt) G100 (on eng block, near starter motor) G104 (near right head lamp) Hot at all times Hot in run or start Htr/vlv clutch fuse 10a Ign 1 relay Main relay Pnk Pre fuse 10a R43 R44 R45 R46 R48 R49 R63 R64 R65 R66 Rear integration module (rim) (under package shelf trim panel) Rev sw sig Reverse switch Sp102 Start rly ctrl Start rly volt Starter fuse 30a Starter relay Starting/ charging system Under- hood fuse block (left front of eng compt) Vehicle speed sensor (near rear of trans- mission assembly) Vss sig
TRUNK, TAILGATE, FUEL DOOR Trunk Release Wiring Diagram for Cadillac CTS 2003 List of elements for Trunk Release Wiring Diagram for Cadillac CTS 2003: 27 (in rear compartment, to rear of left rear shock tower) g402 A12 Computer data lines system Driver door module (ddm) (on left front door, under door trim panel) Driver door switch assembly (ddsa) Gnd Ground Hot at all times Interior lights system Left rear fuse block (under left side of rear seat) R31 R32 R33 R35 Rear compartment lid release actuator (part of lid release actuator) Rear compartment lid release switch Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel) Relay ctrl Release switch S317 S602 Serial data Switch signal Tan Trk dr rel sol relay Trunk ajar switch signal Trunk release fuse 10a
WARNING SYSTEMS Warning Systems Wiring Diagram (1 of 2) for Cadillac CTS 2003 List of elements for Warning Systems Wiring Diagram (1 of 2) for Cadillac CTS 2003: 63 (in engine compartment, near left front strut tower, at bottom of inside fender well) g101 (in passenger compartment, behind left kick pad) g200 2.7 ohms A11 A12 Accessory Accessory voltage Auto B10 B12 Battery Brake fluid level switch (at rear of engine compartment, on brake fluid reservoir) Brake indicator Class 2 (dim) Class 2 (sdm) Class 2 serial data Computer data lines system Crank Dash integration module (dim) under right side of dash, above right closeout/insulator panel) Dim/ aldl fuse 10a Door ajar signal Door ajar sw signal Door key unlock switch signal Door open signal Driver door latch assembly (at rear of left front door) Driver door module (ddm) (on left front door, under door trim panel) Driver dr key sw signal Fasten safety belt indicator G200 (in passenger compartment, behind left kick pad) G201 (in passenger compartment, behind right kick pad) Gnd Ground Ground distribution system Hdlp Headlamp switch Headlamp switch on signal Hot at all times Ignition 1 voltage Ignition switch Instrument panel cluster (ipc) Key in Key in ignition switch Key in ignition switch signal Left front door sw sig Lights on indicator Logic Off Off/lock Ohms Park brake switch (on park brake assembly) Park brake switch signal Parklamp switch on signal Pnk Run S119 S121 Splice pack sp200 (under dash, above steering column) Splice pack sp201 (behind ignition switch, near hvac module) Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module) Splice pack sp203 (in passenger compartment, under left side of dash trim pad) Tan Underhood fuse block (in right front corner of engine compartment) Voltage check fuse 10a Warning Systems Wiring Diagram (2 of 2) for Cadillac CTS 2003 List of elements for Warning Systems Wiring Diagram (2 of 2) for Cadillac CTS 2003: 37 (in engine compartment, near left front strut tower at bottom of inside fender well) g101 (in engine harness, aproximately 120 cm from ho2s bank 2 sensor 1) A11 A22 A23 Audio amplifier (in left rear compartment, behind left strut tower) B11 Base Bose Class 2 serial data Computer data lines system Coolant level sw Coolant level switch (in left front corner of coolant surge tank) Data link connector (dlc) (partial) (in passenger compartment, under dash next to hood release lever) E10 E11 Ect sensor signal Engine control module (ecm) (at right front corner of engine compartment) Engine coolant temperature (ect) sensor (on top rear of intake manifold) Fuel level sensor Fuel pump & sensor assembly (in fuel tank) Hvac control module (on center of dash, below radio) Inflatable restraint sensing & diagnostic module (sdm) (at center of passenger compartment floor, under console) Left front seat belt switch (in left front seat belt buckle) Left seat belt sw signal Low reference Nca Note: radio generates audio warnings through left front speaker. audio warning chimes are used for: fasten safety belt, key in ignition, lights on warning, park brake warning, hot coolant temperature & low fuel Pnk Radio S111 S400 (in rear compartment lid harness, approximately 237 cm from c401) Secondary fuel sender assembly (under vehicle, in fuel tank) Splice pack sp201 (behind ignition switch, near hvac module) Splice pack sp300 (in passenger compartment, on left frame rail, near left side of driver's seat) Splice pack sp303 (behind passenger's seat, near right rear fuse block) Tan
WIPER/WASHER Wiper/Washer Wiring Diagram, Early Production for Cadillac CTS 2003 List of elements for Wiper/Washer Wiring Diagram, Early Production for Cadillac CTS 2003: 55 (in engine compartment, near left front strut tower, at bottom of inside fenderwell) g101 (not used) 120,000 ohms 24,000 ohms 30,000 ohms 410,000 ohms 43,000 ohms 60,000 ohms Accy voltage B10 B11 B12 C202 Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel) Delay Ground Hdlp wash cb 30a Headlamp washer fluid pump (w/ce4) (inside washer reservoir) Headlamp washer gnd Headlamp washer relay (in underhood bel assembly, near right front corner, under fuse block) Hot at all times Hot in accy or run If equipped Int Jumper wire Layer 1 Layer 2 Layer 3 Lo d5 Logic Mist Nca Off Off d1 R67 R68 Splice pack sp200 (in right front of passenger compartment, under dash, above steering column) Tan Underhood fuse block (in right front corner of engine compartment) Wash Washer fluid level signal Washer pump ctrl Washer switch Washer switch signal Windshield washer fluid level switch Windshield washer fluid pump (near base of washer fluid reservoir) Windshield wiper/washer module (on left rear of engine compartment, near windshield) Windshield wiper/washer switch Wiper mod fuse 30a Wiper mtr high speed Wiper sw fuse 10a Wiper sw on signal Wiper sw signal 1 Wiper sw signal 2 Wiper switch Wiper/Washer Wiring Diagram, Late Production for Cadillac CTS 2003 List of elements for Wiper/Washer Wiring Diagram, Late Production for Cadillac CTS 2003: 56 (in engine compartment, near left front strut tower, at bottom of inside fenderwell) g101 (not used) 120,000 ohms 24,000 ohms 30,000 ohms 410,000 ohms 43,000 ohms 60,000 ohms Accy voltage B10 B11 B12 C202 Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel) Delay Ground Hdlp wshr module circuit breaker 30a Hdlp wshr relay Headlamp washer fluid pump (inside washer reservoir) Headlamp washer gnd Hot at all times Hot in accy or run Int Layer 1 Layer 2 Layer 3 Lo d5 Mist Nca Off Off d1 R67 R68 R69 R70 R71 Solid state timer relay Splice pack sp200 (in right front of passenger compartment, under dash, above steering column) Tan Underhood fuse block (in right front corner of engine compartment) Wash Washer fluid level signal Washer pump ctrl Washer switch Washer switch signal Windshield washer fluid level switch Windshield washer fluid pump (near base of washer fluid reservoir) Windshield wiper/washer module (on left rear of engine compartment, near windshield) Windshield wiper/washer switch Wiper mod fuse 30a Wiper mtr high speed Wiper sw fuse 10a Wiper sw on signal Wiper sw signal 1 Wiper sw signal 2 Wiper switch
