POWER DISTRIBUTION – Cadillac CTS 2003 – SYSTEM WIRING DIAGRAMS

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:

• (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:

• (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:

• (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:

• (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:

• (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:

• (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:

• (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