Diagram sections — 29 (51 total)
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 POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER TOP/SUNROOF POWER WINDOWS RADIO SHIFT INTERLOCK STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION TRUNK, TAILGATE, FUEL DOOR WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Compressor Wiring Diagram for Saturn Ion 3 2004 List of elements for Compressor Wiring Diagram for Saturn Ion 3 2004: 49 (at rear of engine, near coolant overflow container) (2.0l) powertrain control module (pcm) (not used) +5v 2.0l 2.2l A/c compressor clutch (at lower left front of engine) A/c diode A/c fuse 5 10a A/c on led A/c on/off A/c press A/c refrigerant pressure sensor (on lower left side of engine, below generator) A/c relay A/c request A/c switch A10 Aa1 Aa2 Aa3 Aa4 B11 Body control module (bcm) (at lower center of dash) Class 2 data Early production Ect sens Engine control module (ecm) (2.2l) (at left side of engine compt) Engine coolant temperature (ect) sensor (2.0l: on top of engine, near right front corner of camshaft cover) (2.2l (vin f): on right rear side of engine, near exhaust manifold) F10 G101 (behind left front headlamp) G203 (behind lower left side of dash, left of steering column) Hot at all times Hot in run or start Hvac control assembly (at lower center of dash) Hvac fan switch Hvac fuse 7.5a Ign 3 volt Late production Logic Low ref Off Red Run (ign 3) fuse 48 30a Run relay Run relay ctrl Run/ crank relay S101 S233 (in i/p harness, 5 cm from ambient light sensor breakout) Sp101 (in forward lamp harness, near left headlamp) Underhood fuse block (2.2l (vin f): at left rear side of engine compartment) Heater Wiring Diagram for Saturn Ion 3 2004 List of elements for Heater Wiring Diagram for Saturn Ion 3 2004: 21 Aa1 Aa2 Aa3 Aa4 B11 Blower motor (behind lower right side of dash, behind glove compt) Blower motor resistor assembly (behind lower right side of dash, behind glove compt) Body control module (bcm) (at lower center of dash) G203 (behind lower left side of dash, left of steering column) Hot at all times Hvac control assembly (at lower center of dash) Hvac fan switch Logic Off Red Run (ign 3) fuse 48 30a Run relay Run relay cntrl S260 (in i/p harness, 6.5 cm from blower motor breakout) Tan Underhood fuse block (at left rear side of engine compartment) Manual A/C Wiring Diagram for Saturn Ion 3 2004 List of elements for Manual A/C Wiring Diagram for Saturn Ion 3 2004: 70 (behind lower right side of dash, near "a" pillar) recirculation actuator (not used) +5v A/c compressor clutch (at lower left front of engine) A/c diode A/c fuse 5 10a A/c ind A/c press A/c refrigerant pressure sensor (on lower left side of engine, below generator) A/c relay A/c request A/c sig sw A/c switch A10 Aa1 Aa2 Aa3 Aa4 B11 Bi-lvl Blend Blower motor (behind lower right side of dash, behind glove compt) Blower motor resistor assembly (behind lower right side of dash, behind glove compt) Body control module (bcm) (at lower center of dash) Class 2 data Cool fan rel Cooling fan (at front of engine compt, attached to radiator) Cooling fan fuse 45 30a Cooling fan relay Def Early production Ect sens Engine control module (ecm) (at left side of engine compt) Engine coolant temperature (ect) sensor (on right rear side of engine, near exhaust manifold) F10 G101 (behind left front headlamp) G105 (on lower left rear of engine, above starter) G203 (behind lower left side of dash, left of steering column) Hot at all times Hot in run or start Htr Hvac control assembly (at lower center of dash) Hvac fan switch Hvac fuse 7.5a Ign 3 volt Illum Interior lights system Late production Logic Low ref Mode sw sig Mode switch Off Rec dr ctrl a Rec dr ctrl b Rec sw sig Recirc ind Recirc switch Red Run (ign 3) fuse 48 30a Run relay Run relay ctrl Run/ crank relay S101 S233 (in i/p harness, 5 cm from ambient light sensor breakout) S260 (in i/p harness, 6.5 cm from blower motor breakout) Sp101 (in forward lamp harness, near left headlamp) Tan Underhood fuse block (at left rear side of engine compartment) Vent
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram for Saturn Ion 3 2004 List of elements for Anti-lock Brakes Wiring Diagram for Saturn Ion 3 2004: 54 2.2l 2.0l Abs 1 fuse 22 20a Abs 2 fuse 8 10a Abs fuse 40 40a Abs indicator Battery Body control module (bcm) (at lower center of dash) Brake pressure modulator valve Class 2 serial data Electronic brake control module (ecbm) (at left side of engine compartment) Engine control module (ecm) (2.2l) (at left side of engine compartment) powertrain control module (2.0l) (at left side of engine, near coolant overflow container) Engine controls system G109 (at left rear side of engine compartment) G201 (behind lower left side of dash, left of steering column) Ground Hot at all times Hot in run or start Ign 1 Ign timing control Instrument panel cluster Left front wheel speed sensor (part of left front hub & bearing assembly) Left rear wheel speed sensor (part of left rear hub & bearing assembly) Lf inlet solenoid valve Lf outlet solenoid valve Lf wheel speed ref Lf wheel speed sig Logic Lr inlet solenoid valve Lr outlet solenoid valve Lr wheel sen ref Lr wheel sen sig Message center Pnk Red Rf inlet solenoid valve Rf outlet solenoid valve Rf wheel speed ref Rf wheel speed sig Right front wheel speed sensor (part of right front hub & bearing assembly) Right rear wheel speed sensor (part of right rear hub & bearing assembly) Rr inlet solenoid valve Rr outlet solenoid valve Rr wheel sen ref Rr wheel sen sig S221 Stop fuse 15a Stop sw input Tan Traction control indicator control Traction control switch (w/ traction control) (2.2l) Traction control switch signal Traction off indicator Underhood fuse block (2.2l) (at left rear side of engine compartment) Upper stop lamp switch (below left side of dash, attached to brake pedal bracket)
ANTI-THEFT Anti-theft Wiring Diagram for Saturn Ion 3 2004 List of elements for Anti-theft Wiring Diagram for Saturn Ion 3 2004: 56 (2.0l: near coolant overflow container) (2.2l: at left side of engine compt) (2.0l) powertrain control module (pcm) (2.2l (vin f)) engine control module (ecm) (in body harness, 7.5 cm from rear compartment light breakout) s413 (near driver seat belt) (near front left passenger seat belt) 2.0l 2.2l 5v ref Acc Ajar switch B(+) Bcm (pwr) fuse 15a Bcm class 2 serial data Bcm elect fuse 7.5a Body control module (bcm) (at lower center of dash) C2 c2 Cluster fuse 7.5a Dash fuse 7.5a Driver door jamb switch (left front of dash, on outer trim cover) Driver door jamb switch signal Early production Ecm class 2 serial data Engine controls system Exterior lights system Front passenger door jamb switch (right front of dash, on outer trim cover) Fuel injector control G201 (behind lower left side of dash, left of steering column) G301 (under driver's seat) G403 (under center of rear shelf) Gnd Horn relay ctrl Horns system Hot at all times Ignition switch Instrument panel cluster Interior lights system Late production Left rear door jamb switch (sedan) Lock Logic Nca Off Passenger door jamb switch signal Rear compartment lid release actuator (in rear compartment lid) Right rear door jamb switch (sedan) Run S221 S250 S351 S990 Security indicator Security indicator control Sp403 (in body harness, near right rear speaker) Start Start signal Trunk ajar switch signal Turn/ hazard switch power
BODY CONTROL MODULES Body Control Modules Wiring Diagram (1 of 2) for Saturn Ion 3 2004 List of elements for Body Control Modules Wiring Diagram (1 of 2) for Saturn Ion 3 2004: 77 (sedan) mirrors system (coupe) power tops & mirrors systems 5v ref A/c request sig A10 Acc pwr Acc voltage Air conditioning system Anti-lock brakes system Anti-theft system B(+) B11 Bcm class 2 ser data Body control module (bcm) (at lower center of dash) Computer data lines system Defogger system Drl amb light sen ref Drl amb light sen sig Drv dr jamb sw sig Engine controls system Exterior lights system Fog lp rly ctrl Fog lp sw sig Fuel pump pwr Fuel pump rly ctrl G101 (behind left front headlamp) G201 (behind lower left side of dash, left of steering column) Ground Headlamps off sig Headlights system High beam sig Horn rly ctrl Horns system Hot at all times Ign 1 pwr Ign 3 pwr Interior lights system Ip batt 1 fuse 39 30a Ip batt 1a fuse 47 30a Ip batt 2 fuse 41 40a Low beam pwr Low beam sig Low ref Lp dim ctrl Lt turn sig pwr Off/run/crank pwr Panel lp pwr Park brake sw sig Park lp pwr Pass dr jamb sw sig Pnk Power distribution system Power distribution system (ignition switch) Power windows system Pwr window sw lockout ctrl (sedan) Rear defog rly ctrl Rear defog sw sig Red Rt turn sig pwr Run (ign 3) fuse 48 30a Run/ crank fuse 38 30a Run/ crank relay Run/crank pwr S250 Security ind ctrl Shift interlock system Shift lk sol pwr Sound systems Sp101 (in forward lamp harness, near left headlamp) Stop lp sw sig Trac ctrl ind Trac ctrl sw sig Turn/haz sw pwr Underhood fuse block (2.2l: at left rear side of engine compt) Warning system Washer pump ctrl Wiper sw sig 1 Wiper/washer system Body Control Modules Wiring Diagram (2 of 2) for Saturn Ion 3 2004 List of elements for Body Control Modules Wiring Diagram (2 of 2) for Saturn Ion 3 2004: 61 Acc voltage Air conditioning system Anti-theft system B(+) Bcm class 2 ser data Blower motor pwr Body control module (bcm) (at lower center of dash) Brake fluid lev sen sig Class 2 serial data Computer data lines system Courtesy lp low ctrl Cruise control system Cruise control system & electronic power steering system Cruise control/engine controls systems Defogger system Door lk act lk ctrl Door lk act unlk ctrl Door locks system Engine controls system Exterior lights system Fog lp rly ctrl G301 (under driver's seat) Ground Ground (sedan) Headlights system High beam sig Horn rly ctrl Horns system Ign 1 voltage Ign 3 voltage Inadvertent pwr Instrument cluster system Interior lights system Left turn sig lp pwr Lf dr lk act unlk ctrl Lo coolant lev ind sig Low beam sig Mirrors system Park lp pwr Pass dr jamb sw sig Pnk Power distribution system (aux power outlet) Power distribution system (ignition switch) Rear defog rly ctrl Red Right turn sig lp pwr Run/crank voltage S351 Shift interlock system Sound systems Starting/charging system Stop lp sw sig Tan Trunk ajar ind ctrl Trunk rel motor pwr Trunk, tailgate, fuel doors system Warning system Washer pump ctrl Wiper mtr park sw sig Wiper sw sig 2 Wiper/washer system
COMPUTER DATA LINES Computer Data Lines Wiring Diagram for Saturn Ion 3 2004 List of elements for Computer Data Lines Wiring Diagram for Saturn Ion 3 2004: 42 (i/p harness, 5cm from data link connector (dlc) breakout) s205 (not used) 2.0l 2.2l 5 speed transmission A11 A12 B10 Bcm class 2 serial data Body control module (bcm) (at lower center of dash) Class 2 serial data Continuously variable ratio transmission Data link connector (dlc) (under lower left side of dash) Ebcm class 2 serial data Electronic brake control module (ebcm) (w/ anti-lock brakes) (at left side of engine compartment) Engine control (2.2l) powertrain control (2.0l) (2.2l: at left side of engine compartment) (2.0l: at rear of engine, near coolant overflow container) Eps class 2 serial data G201 (behind lower left side of dash, left of steering column) G203 (behind lower left side of dash, left of steering column) High speed gm lan serial data bus + High speed gm lan serial data bus - Hot at all times Inflatable restraint sensing & diagnostic module (sdm) (under center console, behind emergency brake) Instrument panel cluster Ipc class 2 serial data Lighter fuse 15a Logic Low speed gm lan serial data Module (ecm) Module (pcm) Power steering control module (pscm) Radio Resistor (in i/p harness, lower left side of dash, 6 cm from data link connector (dlc)) S215 (i/p harness, 6cm from data link connector (dlc) breakout) S221 S233 Sdm class 2 serial data Steering column assembly Tan Transmission control module (tcm) (2.2l) (at left rear of engine compartment, near strut tower) Vcim class 2 serial data Vehicle communication interface module (vcim) (if equipped) (at center of rear package shelf, between rear speakers)
COOLING FAN Cooling Fan Wiring Diagram for Saturn Ion 3 2004 List of elements for Cooling Fan Wiring Diagram for Saturn Ion 3 2004: 27 (not used) B6 c2 Body control module (bcm) (at lower center of dash) Class (bcm) Class 2 serial data Coolant level switch (at left side of engine compt, attached to over flow container) Cooling fan fuse 45 30a Cooling fan motor Cooling fan relay Cooling fan relay control E1 c1 Ect sensor sig Engine control module (ecm) (at left side of engine compt) Engine coolant temperature (ect) sensor (on right rear side of engine, near exhaust manifold) Engine coolant temperature gage Erls fuse 10 10a G105 (on lower left rear of engine, above starter) Hot at all times Hot in acc or run Ign Instrument panel cluster (ipc) Logic Low coolant level ind sig Low ref Message center Pnk Underhood fuse block (at left rear side of engne compt)
CRUISE CONTROL Cruise Control Wiring Diagram for Saturn Ion 3 2004 List of elements for Cruise Control Wiring Diagram for Saturn Ion 3 2004: 51 (2.0l) (2.2l) (early production) (in i/p harness, 6 cm from breakout for c235) (late production) 2.0l 2.0l 2.2l 2.2l 2.2l All times Body control module (bcm) (at lower center of dash) Clutch pedal position (cpp) switch (2.0l) Clutch/brake cruise fuse 7.5a Cpp sw sig Cruise control module (ccm) (behind lower left side of dash, above brake pedal) Ecm class 2 serial data Engine control module (ecm) (2.2l) powertrain control module (pcm) (2.0l) (2.2l: at left side of engine compt) (2.0l: at rear of engine, near coolant overflow container) Engine controls system Eps fuse 2a G203 (behind lower left side of dash, left of steering column) Ground Hot at Hot in acc or run Ign 1 Inflatable restraint steering wheel module coil (behind steering wheel) Instrument cluster Ipc class 2 serial data Left steering wheel controls Logic Lower stop lamp switch (below left side of dash, attached to brake pedal bracket) Message center Off Pnk Resume/ accel Right steering wheel controls S227 S233 S239 Servo clutch control Servo move control signal Servo move direction signal Set/ coast Set/coast resume/ accelerate signal Stop fuse 15a Stop lamp signal Tcc brake sw/cruise Underhood fuse block at left rear side of engine compt) Upper stop lamp switch (below left side of dash, attached to brake pedal bracket) Vehicle speed sensor (vss) (at rear of engine, on transaxle) Vss high Vss low
DEFOGGERS Defoggers Wiring Diagram for Saturn Ion 3 2004 List of elements for Defoggers Wiring Diagram for Saturn Ion 3 2004: 30 Body control module (bcm) (at lower center of dash) C2 a C2 a10 C2 a12 C3 a10 Early production G101 (behind left front headlamp) G203 (behind lower left side of dash, left of steering column) G403 (under center of rear shelf) Hot at all times Hvac control assembly (at lower center of dash) Late production Logic Rear defog indicator Rear defog relay Rear defog rly ctrl Rear defog sw sig Rear defog switch Rear window defogger grid Rr defog fuse 30a S101 S233 S403 Sp101 (near left headlamp) Sp403 (near right rear speaker) U10 U12 Underhood fuse block (2.2l): at left rear side of engine compt) V10 V12
ELECTRONIC POWER STEERING Electronic Power Steering Wiring Diagram for Saturn Ion 3 2004 List of elements for Electronic Power Steering Wiring Diagram for Saturn Ion 3 2004: 25 (2.2l) (2.0l) - c3 B(+) Body control module (bcm) (at lower center of dash) Class 2 serial data Computer data lines system Cruise control system Electric power steering (eps) motor Eps 1 fuse 43 30a 60a Eps 2 (2.2l) fuse 42 30a Eps fuse 2a G109 (at left rear side of engine compartment) Ground Hot at all times Hot in run or start Ignition 1 Logic Pnk Power steering control module (pscm) Red S227 Steering column assembly Torque sensor Underhood fuse block (at left rear side of engine compartment) W/ cruise control
ENGINE PERFORMANCE
2.2L VIN F 2.2L VIN F, Engine Performance Wiring Diagram (1 of 4) for Saturn Ion 3 2004 List of elements for 2.2L VIN F, Engine Performance Wiring Diagram (1 of 4) for Saturn Ion 3 2004: 53 (at left rear of engine compt, attached to master cylinder) (in i/p harn, 6 cm from data link connector breakout) s215 (w/ abs) (w/ electronic automatic cruise control) 5 volt ref A/c comp rly A/c system A10 Acc Acc volt Battery Body control module (bcm) Class 2 data Computer data lines system Cruise control module (ccm) (w/ electronic automatic cruise control) (behind lower left side of dash, above brake pedal) Cruise control system Cruise set sw Crz srvo cltch Crz srvo move Data class 2 Data link connector (dlc) (partial) (under lower left side of dash) Ecm fuse 9 10a Ecm/tcm fuse 1 10a Engine control module (at left side of engine compt) Evap vent sol Ftp sens sig Fuel lev sens Fuel pmp rly G101 (behind left front headlamp) Hot at all times Hot in run or start Ign 1 Ign sw fuse 1 2a Ignition switch Instrument cluster Logic Low ref Malfunc- tion indicator lamp Mil ctrl Off Pnk Resistor r201 (121 ohms) Run Run/ crank relay 28 Run/crank fuse 38 30a S205 (in i/p harn, 5 cm from data link connector breakout) S239 Ser data bus + Ser data bus - Start Stop lmp sw Tan Underhood fuse block (at left rear side of engine compt) 2.2L VIN F, Engine Performance Wiring Diagram (2 of 4) for Saturn Ion 3 2004 List of elements for 2.2L VIN F, Engine Performance Wiring Diagram (2 of 4) for Saturn Ion 3 2004: 43 (at left rear of engine compt, attached to master cylinder) (at left side of engine compt) electronic brake control module 1-4 coil ctrl A/c refrigerant pressure sensor (w/ man a/c) (on lower right side of engine, below generator) Ba1 Ba2 Ba3 Ba4 Body control module (bcm) Cam sig out Class 2 data Cruise fuse 7.5a Csi pickup Fuel pump Fuel pump & sender assembly (inside fuel tank) Fuel pump fuse 15a Fuel pump relay Fuel sender Fuel tank pressure (ftp) sensor (mounted on top of fuel pump & sender assembly) G105 (lower left rear of engine) G301 (under driver's seat) Ground Hot at all times Hot in acc or run Hot in run or start Ic 1-4 Ic 2-3 Ign fuse 11 10a Ign volt Ignition Ignition coil Ignition control module (at top rear of engine, near oil fill cap) Inter connect Lower stop lamp switch (below left side of dash, attached to brake pedal bracket) Nca Nca 2-3 coil ctrl Pnk Red/pnk S351 Stop fuse 15a Underhood fuse block (at left rear side of engine compt) Upper stop lamp switch (below left side of dash, attached to brake pedal bracket) Vehicle speed sensor (vss) (w/ getrag 5 speed m/t) (at rear of engine transaxle) 2.2L VIN F, Engine Performance Wiring Diagram (3 of 4) for Saturn Ion 3 2004 List of elements for 2.2L VIN F, Engine Performance Wiring Diagram (3 of 4) for Saturn Ion 3 2004: 22 (at left side of engine compt) evaporative emission canister purge solenoid (at rear of engine compt, in exhaust manifold) heated oxygen sensor 1 (at rear of engine compt, in exhaust near catalytic convertor) heated oxygen sensor 2 (coupe) (sedan) (under rear of vehicle, behind fuel tank) evaporative emission canister vent solenoid Crankshaft position sensor (on lower rear of engine, below oil filter) Engine coolant temperature sensor (on right rear side of engine, near exhaust manifold) Engine oil pressure (eop) switch (on lower left side of engine, above starter) Erls fuse 10 10a Hot in run or start Intake air temperature sensor (at left front of engine, attached to air cleaner outlet) Knock sensor (on lower left side of engine, below throttle body) Manifold absolute pressure sensor (on top rear of engine, behind throttle body) Nca Pnk Ser data + Ser data - Tan Throttle position sensor (mounted to throttle body) Transmission control module (at left rear of engine compt, near strut tower) Underhood fuse block (at left rear side of engine compt) 2.2L VIN F, Engine Performance Wiring Diagram (4 of 4) for Saturn Ion 3 2004 List of elements for 2.2L VIN F, Engine Performance Wiring Diagram (4 of 4) for Saturn Ion 3 2004: 52 (in fuel inj harn, at breakout for manifold absolute pressure sensor) (w/ a/t) 5 volt ref A/c press sens Ckp sig Cmp sens sig Cool fan rly Cooling fans system Ect sig Engine control module (at left side of engine compt) Evap purge sol Fuel injectors G105 (lower left rear of engine) Gen f term Gen l term Ground Ho2s 1 htr hi Ho2s 2 htr lo Ho2s sen 1 hi Ho2s sen 1 lo Ho2s sen 2 hi Ho2s sen 2 lo Hot in run or start Iac coil a hi Iac coil a lo Iac coil b hi Iac coil b lo Iat sens Ic tim ctrl Idle air control valve (at top left front of engine, near throttle body) Inj 1 ctrl Inj 2 ctrl Inj 3 ctrl Inj 4 ctrl Injectors fuse 16 10a Knock sens Low ref Map signal Oil press sw Pnk Pnp/clutch sig Red S139 Ser data + Ser data - Start rly ctrl Starting/ charging system Tan Tp signal Underhood fuse block (at left rear side of engine compt) Vss sig hi Vss sig lo
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Saturn Ion 3 2004 List of elements for Back-up Lamps Wiring Diagram for Saturn Ion 3 2004: 26 (5 spd a/t) (cvt) (premium) s401 A/t Back-up fuse 15 10a Backup lamp switch (at left side of engine compartment, on top of transaxle) C12 C2 b12 Early production Exterior lamps circuit F11 G401 (under center of rear shelf) G403 (under center of rear shelf) Hot in run or start Inside rearview mirror Late production Left backup lamp M/t Park/ neutral position switch (on top of transaxle) Pnk Right backup lamp S335 (in body harness, 15 cm from auxiliary power outlet breakout) S403 Sp401 (in body harness, near left rear speaker) Sp403 (in body harness, near right rear speaker) Underhood fuse block (2.2l (vin f): at left rear side of engine compt) Exterior Lamps Wiring Diagram, Early Production for Saturn Ion 3 2004 List of elements for Exterior Lamps Wiring Diagram, Early Production for Saturn Ion 3 2004: 64 (coupe) (sedan) a (sedan) b (sedan) g Alc/ park relay Anti-lock brakes system Auto Bb1 Bb2 Bb3 Bb4 Body control module (bcm) (at lower center of dash) C2 f12 C3 a12 Center high mounted stop lamp (chmsl) (6 bulbs) D11 E12 Engine controls/ transmissions system G101 (behind left front headlamp) G201 (behind lower left side of dash, left of steering column) G203 (behind lower left side of dash, left of steering column) G401 (under center of rear shelf) G403 (under center of rear shelf) Hazard switch Head Headlamp switch Hot at all times Instrument panel cluster (ipc) Interior lights system Left Left backup lamp Left front marker lamp (coupe) Left front park/ turn signal lamp Left tail/ stop lamp Left tail/ turn signal lamp Left turn signal ind Left turn signal input License lamp Logic Off Park Park fuse 15a Park lamp relay ctrl Right Right backup lamp Right front marker lamp (coupe) Right front park/ turn signal lamp Right tail/ stop lamp Right tail/ turn signal lamp Right turn signal ind Right turn signal input S221 S260 S270 (in i/p harness, 5.5 cm from body control module (bcm) breakout) S375 S990 Sp101 (in forward lamp harness, near left headlamp) Sp401 (in body harness, near left rear speaker) Sp403 (in body harness, near right rear speaker) Stop fuse 15a Turn signal/ multi- function switch Turn switch Underhood fuse block (2.2l (vin f): at left rear side of engine compt) Upper stop lamp switch (below left side of dash, attached to brake pedal bracket) Exterior Lamps Wiring Diagram, Late Production for Saturn Ion 3 2004 List of elements for Exterior Lamps Wiring Diagram, Late Production for Saturn Ion 3 2004: 64 (behind left front headlamp) g101 (coupe) (sedan) a (sedan) b (sedan) g Alc/ park relay Anti-lock brakes system Auto Bb1 Bb2 Bb3 Bb4 Body control module (bcm) (at lower center of dash) C2 f12 C3 a12 Center high mounted stop lamp (chmsl) (6 bulbs) D11 E12 Engine controls/ transmissions system G201 (behind lower left side of dash, left of steering column) G203 (behind lower left side of dash, left of steering column) G401 (under center of rear shelf) G403 (under center of rear shelf) Hazard switch Head Headlamp switch Hot at all times Instrument panel cluster (ipc) Interior lights system Left Left backup lamp Left front marker lamp (coupe) Left front park/ turn signal lamp Left tail/ stop lamp Left tail/ turn signal lamp Left turn signal ind Left turn signal input License lamp Logic Off Park Park fuse 15a Park lamp relay ctrl Right Right backup lamp Right front marker lamp (coupe) Right front park/ turn signal lamp Right tail/ stop lamp Right tail/ turn signal lamp Right turn signal ind Right turn signal input S101 S221 S260 S270 (in i/p harness, 5.5 cm from body control module (bcm) breakout) S375 S401 (premium) S403 S990 Stop fuse 15a Turn signal/ multi- function switch Turn switch Underhood fuse block (2.2l (vin f): at left rear side of engine compt) Upper stop lamp switch (below left side of dash, attached to brake pedal bracket)
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 4) for Saturn Ion 3 2004 List of elements for Ground Distribution Wiring Diagram (1 of 4) for Saturn Ion 3 2004: 43 (coupe) (not used) (sedan) A/c compressor clutch A/c diode A10 A11 Battery Coupe D11 E17 Electronic brake control module (ebcm) F10 Fog lamp relay 26 G101 (early production) (behind left front headlamp) G101 (late production) (behind left front headlamp) G109 (at left rear side of engine compartment) G12 G502 (at right rear side of trunk) Horn L10 L11 Left front fog lamp Left front marker lamp Left front park/turn signal lamp Manual a/c Power steering control module (pscm) Q11 Rear defog relay 34 Right front fog lamp Right front marker lamp Right front park/turn signal lamp Run/crank relay 28 S101 Sp101 (in forward lamp harness, near left headlamp) Steering column assembly Underhood fuse block (at left rear side of engine compartment) V10 W/ abs Windshield washer fluid pump Windshield wiper motor assembly Wiper 1 relay 32 Wiper 2 relay 32 Ground Distribution Wiring Diagram (2 of 4) for Saturn Ion 3 2004 List of elements for Ground Distribution Wiring Diagram (2 of 4) for Saturn Ion 3 2004: 60 (behind lower left side of dash, left of steering column) g201 (if equipped) (if equipped) cruise control module (ccm) (in i/p harness, 10 cm from electronic power steering (eps) assembly breakout) s221 (in i/p harness, 5 cm from ambient light sensor breakout) (not used) (sedan) (under driver's seat) g301 (w/ cruise control) left steering wheel controls 2.2l A/t A/t shift lock solenoid A11 A12 Automatic transmission (a/t) shift indicator lamp Ba4 Blower motor Body control module (bcm) Brake fluid level switch Coupe Data link connector (dlc) Driver door Driver door lock switch Driver window switch Fog lamp switch Front auxiliary power outlet Front passenger door jamb switch Front passenger door lock switch Fuel pump & sender assembly Fuel pump (fp) Fuel pump relay G203 (behind lower left side of dash, left of steering column) Hazard switch Headlamp relay Horn switch Hvac control assembly Ignition lock cylinder control switch Inflatable restraint sensing & diagnostic module (sdm) Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Jamb Left rear door jamb switch Left seat belt switch Logic Nca Outside rearview mirror switch Radio Rear auxiliary power outlet Red Right rear door jamb switch S233 S351 (in body harness, 38.5 cm from auxiliary power outlet breakout) S355 S533 (in driver's door harness, 3.5 cm from driver's door lock switch breakout) Sedan Sedan & coupe w/ power windows & power mirrors Sedan w/o power windows & power mirrors Switch Traction control switch Turn signal/ multi-function switch Ground Distribution Wiring Diagram (3 of 4) for Saturn Ion 3 2004 List of elements for Ground Distribution Wiring Diagram (3 of 4) for Saturn Ion 3 2004: 26 (if equipped) inside rearview mirror (if equipped) sunroof module (if equipped) sunroof switch (in headliner harness, 10 cm from dome lamp breakout) s375 (not used) (w/ dual reading lamp) courtesy/ reading lamp (w/ premium sound) audio amplifier Audio amplifier Center high mounted stop lamp (chmsl) Digital radio receiver Dome lamp G401 (early production) (under center of rear shelf) G401 (late production) (under center of rear shelf) Left backup lamp Left tail/ stop lamp Left tail/ turn signal lamp Onstar Onstar/ s-band S-band S401 S415 Sp401 (in body harness, near left rear speaker) U2k Vehicle communication interface module (vcim) W/ premium sound W/o premium sound Ground Distribution Wiring Diagram (4 of 4) for Saturn Ion 3 2004 List of elements for Ground Distribution Wiring Diagram (4 of 4) for Saturn Ion 3 2004: 35 (not used) 5 spd (a/t) A/t After cooler pump Cooling fan Cooling fan 2 Cooling fan s/p relay Cvt Early production Engine control module (ecm) G103 (2.0l) (at lower left front side of engine compt) G103 (2.2l (vin f)) (at lower left front side of engine compartment) G105 (2.0l) G105 (2.2l (vin f)) (on lower left rear of engine, above starter) G403 (under center of rear shelf) Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition control module (icm) Late production License lamp M/t Maf/iat sensor Powertrain control module (pcm) Rear compartment lid release actuator Rear window defogger grid Right backup lamp Right tail/ stop lamp Right tail/ turn signal lamp S175 (in engine harness, 35 cm from engine harness breakout) S403 S990 (in deck lid harn, 10 cm from rear compartment lid release actuator breakout) Sp403 (2.2l (vin f)) (in body harness, near right rear speaker) Transmission control module (tcm)
HEADLIGHTS Headlamps & Fog Lamps Wiring Diagram for Saturn Ion 3 2004 List of elements for Headlamps & Fog Lamps Wiring Diagram for Saturn Ion 3 2004: 74 (w/ auto lamps) A10 Ambient light sensor (w/ auto lamps) (on top left side of dash) Auto B+ voltage B11 Body control module (bcm) (at lower center of dash) C pnk C11 C12 C2 f4 C3 a12 Class 2 serial data 2 Cluster fuse 7.5a Computer data lines system Coupe D11 D12 Dimmer switch E10 E12 Early production F12 Flash Fog lamp fuse 17 10a Fog lamp ind Fog lamp relay 26 Fog lamp relay ctrl Fog lamp switch Fog lamp switch signal G10 G101 (behind left front headlamp) G12 G201 (behind lower left side of dash, left of steering column) G203 (behind lower left side of dash, left of steering column) H10 H12 Head Headlamp relay (w/ auto lamps) (behind lower left side of dash, near data link connector (dlc)) Headlamp switch Headlamps off signal High High beam ind High beam sig Hot at all times Instrument panel cluster Interior lights system Ipc class 2 serial data Late production Left front fog lamp b Left front park/turn signal lamp Left headlamp Lh hdlp fuse 18 15a Light sensor low ref Light sensor signal Logic Low Low beam relay control Low beam sig Off Park Pnk Rh hdlp fuse 4 15a Right front fog lamp Right front park/turn signal lamp Right headlamp S101 S221 S233 S260 Sedan Sp101 (in forward lamp harness, near left headlamp) Turn signal/ multi-function switch Underhood fuse block (2.2l: at left rear side of engine compt)
HORN Horn Wiring Diagram for Saturn Ion 3 2004 List of elements for Horn Wiring Diagram for Saturn Ion 3 2004: 19 (behind left front headlamp) Body control module (bcm) (at lower center of dash) Early production G101 G101 (behind left front headlamp) G203 (behind lower left side of dash, left of steering column) Horn (at left front of vehicle) Horn fuse 20 10a Horn relay 25 Horn switch Hot at all times Inflatable restraint steering wheel module (on steering wheel) Inflatable restraint steering wheel module coil (behind steering wheel) Late production Red S101 S233 Sp101 (in forward lamp harness, near left headlamp) Underhood fuse block (2.2l (vin f): left rear side of engine compt)
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram for Saturn Ion 3 2004 List of elements for Instrument Cluster Wiring Diagram for Saturn Ion 3 2004: 54 2.0l 2.2l Abs ind Air bag ind Anti-theft system Body control module (bcm) (at lower center of dash) Brake ind Charge ind Class 2 (bcm) Class 2 (bcm/ecm/ eps/ebcm) Class 2 (ebcm) Class 2 (ecm) Class 2 (sdm) Class 2 serial data Cluster fuse 7.5a Computer data lines system Engine control module (ecm) (2.2l) (at left side of engine compt) powertrain control module (pcm) (2.0l) (at rear of engine, near coolant overflow container) Engine controls system Engine coolant temp gauge Engine oil pressure switch (on lower left side of engine, above starter) Exterior lights system Fuel gauge Fuel level sen signal Fuel pump & sender assembly (under right rear vehicle, inside fuel tank) Fuel sender G201 (behind lower left side of dash, left of steering column) Gauge pointer illumination Ground High beam ind Hot at all times Illumination (6 bulbs) Instrument panel cluster (ipc) Interior lights system Ipc class 2 serial data Left turn signal ind Left turn signal input Logic Low ref bus Malfunction ind Nca Oil pressure ind Pnk Right turn signal ind Right turn signal input S250 Seat belt ind Security ind Security led driver Speedometer Tachometer Trip odometer/ message center Trip/ odometer message center illum Trip/reset switch Up-shift ind
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram for Saturn Ion 3 2004 List of elements for Courtesy Lamps Wiring Diagram for Saturn Ion 3 2004: 49 (in body harness, 7.5 cm from left rear speaker breakout) s411 2.0l 2.2l Ajar switch B(+) Bcm (pwr) fuse 15a Bcm elect fuse 20a Body control module (bcm) (at lower center of dash) Coupe Courtesy lamp low control Courtesy/ reading lamp (w/ dual reading lamp) D401 Dash fuse 7.5a Dome lamp Door Driver door jamb switch (left front of dash, on outer trim cover) Driver door jamb switch signal Early production Front passenger door jamb switch (right front of dash, on outer trim cover) G201 (behind lower left side of dash, left of steering column) G301 (under driver's seat) G401 (under center of rear shelf) G403 (under center of rear shelf) Ground Hot at all times Inadvertent power Late production Left rear door jamb switch (sedan) (near driver seat belt) Logic Map lights Nca Off Passenger door jamb switch signal Rear compartment courtesy lamp Rear compartment lid release actuator (in rear compt lid) Right rear door jamb switch (sedan) (near front left passenger seat belt) S221 S250 S351 S375 S403 S413 (in body harness, 7.5 cm from rear compartment light breakout) S990 Sedan Sp401 (in body harness, near left rear speaker) Sp403 (2.2l) (in body harness, near right rear speaker) W/ remote entry W/o remote entry Warning system Instrument Illumination Wiring Diagram for Saturn Ion 3 2004 List of elements for Instrument Illumination Wiring Diagram for Saturn Ion 3 2004: 39 A12 Alc/ park relay Auto Automatic transmission shift indicator lamp (2.2l) B(+) Bb1 Bb2 Bb3 Bb4 Body control module (bcm) (at lower center of dash) Dash fuse 7.5a Fog lamp switch (deluxe fog lamps) G201 (behind lower left side of dash, left of steering column) G203 (behind lower left side of dash, left of steering column) Gnd Hazard switch Head Headlamp switch Hot at all times Hvac control assembly (at lower center of dash) Illumination Inst panel lamps dim ctrl Inst panel lamps power Instrument panel cluster (ipc) Instrument panel dimmer switch Logic Low ref Off Park Park fuse 15a Park lamp pwr Park lamp rly ctrl Radio S221 S233 S250 S355 Traction control switch (2.2l) Turn signal/ multifunction switch
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 3) for Saturn Ion 3 2004 List of elements for Power Distribution Wiring Diagram (1 of 3) for Saturn Ion 3 2004: 85 (2.2l) (5 spd a/t) (5 spd c1 a/t) (at left rear side of engine compt) underhood fuse block (at lower center of dash) body control module (bcm) (cvt) (cvt) c1 (not used) 5v ref A/c relay 24 A10 A11 Aa2 Aa3 Abs (2.0l) abs 1 (2.2l) fuse 22 20a Abs 2 (2.2l) abs (2.0l) fuse 8 10a Abs fuse 40a Acc Audio amplifier (premium) B1 c2 B11 c2 Ba2 Battery Bcm elect fuse 20a Body control module (bcm) (at lower center of dash) C1 engine control module (ecm) Cluster fuse 7.5a Cooling fan 2 fuse 44 30a Cooling fan 2 relay Cooling fan s/p relay E4 c2 E6 c1 Early production Ecm fuse 1 10a (2.0l) Ecm fuse 9 10a (2.2l) Ecm/tcm Electronic brake control module Electronic brake control module (ebcm) Engine control module (ecm) Fuel pump fuse 15a Fuel pump relay Fuse 1 10a G101 (behind left front headlamp) Generator Ign fuse 11 10a (2.2l) Ign sw fuse 2a Ignition control module Ignition switch Instrument panel cluster (ipc) Ip batt 1 fuse 39 30a Ip batt 1a fuse 47 30a Ip batt 2 fuse 41 40a Key-in switch Late production Left headlamp Lh hdlp fuse 18 15a Lock Lock off Logic Off Park/ neutral position (pnp) switch Pnk Powertrain control module (pcm) Powertrain relay 29 Prem audio (2.2l) radio (2.0l) fuse 21 20a Red Rh hdlp fuse 4 15a Right headlamp Run Run (ign 3) fuse 30a Run relay Run/ crank fuse 38 30a Run/ crank relay S101 S150 (in engine harness, 5 cm from engine harness, breakout) red S158 (in engine harness, 6 cm from starter solenoid breakout) Sp101 (in forward lamp harness, near left headlamp) Start Starter Stop fuse 15a To eps1 fuse 43, eps fuse 43 (underhood fuse block) (diagram 2 of 3) To park fuse (body control module) (diagram 2 of 3) To trans 2 fuse 13 (underhood fuse block) (diagram 3 of 3) Trans- mission control module (tcm) Upper stop lamp switch Power Distribution Wiring Diagram (2 of 3) for Saturn Ion 3 2004 List of elements for Power Distribution Wiring Diagram (2 of 3) for Saturn Ion 3 2004: 77 (at left rear side of engine compt) underhood fuse block (at lower center of dash) body control module (bcm) (coupe) (not used) (sedan) c1 (w/ deluxe fog lamps) 2.0l 5 spd a/t or cvt A/c fuse 5 10a A/c relay 24 Ab1 Ab2 Ab3 Ab4 Acc relay Acc relay control Alc/park relay B11 Bb1 Bb3 Bcm (pwr) fuse 15a Cooling fan (2.2l) cooling fan 1 (2.0l) relay 30 Cooling fan 1 (2.0l) cooling fan (2.2l) fuse 45 30a Crank fuse 46 30a D12 Dash fuse 7.5a Data link connector (dlc) Digital radio receiver (w/ digital audio system s-band) Driver window switch E10 E12 Eps 1 fuse 43 30a (2.2l) Eps 2 Eps fuse 43 60a (2.0l) Evaporative emission (evap) canister vent solenoid F12 Fog fuse 17 10a Fog lamp relay 26 From ip batt 1a fuse 47 & ip batt 1 fuse 48 (underhood fuse block) (diagram 1 of 3) From ip batt 2 a fuse 41 (underhood fuse block) (diagram 1 of 3) Front auxiliary power outlet (at front of center console) Front passenger window switch Fuse 42 30a (2.2l) G10 G203 (behind lower left side of dash, left of steering column) G301 (under driver's seat) Horn fuse 20 10a Horn relay 25 Ignition lock cylinder control actuator Inside rearview mirror (w/ dual reading lamp) Lighter fuse 15a Logic Onstar fuse 10a Park fuse 15a Pcm cont (2.2l) ecm cont (2.0l) relay 31 Power steering control module (pscm) Pwr outlet fuse 15a Pwr windows fuse 30a Radio Radio (acc) fuse 10a Radio (batt 1) fuse 10a Rear auxiliary power outlet (at rear of center console) Rear compartment lid release switch Rear defog relay 34 Red Rr defog fuse 23 30a S417 (w/ digital audio system s-band) Steering column assembly Sun roof fuse 15a Sunroof switch Turn signal/ multi-function switch V12 Vehicle communication interface module (vcim) Windshield wiper/ washer switch Wiper 1 relay 32 Wiper fuse 19 25a Wiper sw fuse 10a Power Distribution Wiring Diagram (3 of 3) for Saturn Ion 3 2004 List of elements for Power Distribution Wiring Diagram (3 of 3) for Saturn Ion 3 2004: 58 (2.0l) (2.2l) (5 spd a/t) (5 spd a/t) c1 (at left rear side of engine compt) underhood fuse block (cvt) (cvt) c1 (not used) 2.0l 2.2l 2.2l a/t A10 Air bag fuse 10a Automatic transmission (cvt) B10 Back-up fuse 15 10a Back-up lamp switch Body control module (bcm) (at lower center of dash) Boost fuse 14 10a (2.0l) C1 pnk C10 C100 C2 pnk Clutch pedal position (cpp) switch Clutch start switch (m/t) Clutch/brake cruise fuse 7.5a Coolant level switch Cruise control module (ccm) (w/ cruise control) Electronic power steering (eps) assembly Eps fuse 2a Erls fuse 10 10a (2.2l) Evaporative emission (evap) canister purge solenoid Evaporative emission (evap) canister vent solenoid From ign d fuse 11 (underhood fuse block) (diagram 1 of 3) Fuel injector Fuse 16 10a Heated oxygen sensor (ho2s) 1 Heated oxygen sensor (ho2s) 2 Inflatable restraint sensing & diagnostic module (sdm) Inflatable restraint steering wheel module coil Injectors Left steering wheel controls Lower stop lamp switch M/t Module leadframe Nca Park/ neutral position (pnp) switch Pnk Pnk (in i/p harness, 22 cm from turn signal/ multi-function switch breakout) s227 Pnk a Powertrain control module (pcm) S139 (in fuel injectors harness, at breakout for manifold absolute pressure (map) sensor) Super charger boost control solenoid (2.0l) Trans 1 fuse 14 10a (2.2l) Trans 2 (2.2l) ecm (2.0l) fuse 13 10a Transmission control module (tcm) W/ cruise control W/o cruise control
POWER DOOR LOCKS Power Door Locks Wiring Diagram for Saturn Ion 3 2004 List of elements for Power Door Locks Wiring Diagram for Saturn Ion 3 2004: 40 Ajar switch B(+) Bcm (pwr) fuse 15a Body control module (bcm) (at lower center of dash) Courtesy lamp low control Door lock actuator lock control Door lock actuator unlock control Door lock/ unlock signal Driver door lock actuator (in top rear of driver door, near door latch) Driver door lock actuator unlock control Driver door lock switch Early production Front passenger door lock actuator (in top rear of front passenger door, near door latch) Front passenger door lock switch G301 (under driver's seat) G403 (under center of rear shelf) Gnd Headlamp low beam relay control Headlights system Horn relay ctrl Horns system Hot at all times Interior lights system Late production Left rear door lock actuator (sedan) (2.2l) (in top rear of left rear door, near door latch) Lock Logic Rear compartment lid release actuator (in rear compartment lid) Rear compartment lid release switch Release actuator m Right rear door lock actuator (sedan) (2.2l) (in top rear of right rear door, near door latch) S337 (in body harness, 7.5 cm from auxiliary power outlet breakout) S351 S533 (w/ power windows & mirrors) S990 Sp403 (in body harness, near right rear speaker) Tan Trunk release motor control Unlock Valet switch
POWER MIRRORS Electrochromic Mirror Wiring Diagram for Saturn Ion 3 2004 List of elements for Electrochromic Mirror Wiring Diagram for Saturn Ion 3 2004: 26 Acc volt Ambient air temp sens sig Ambient air temperature sensor (at left front of vehicle, behind grill) Ambient light sensor Automatic day-night mirror element Automatic day-night mirror low ref Automatic day-night mirror sig Bare Body control module (bcm) (at lower center of dash) Cellular Exterior lights system G401 (under center of rear shelf) Ground Headlight sensor Hot at acc or run Inside rearview mirror Keypad green led Keypad red led Keypad signal Logic Low ref Nca Power tops system S375 Sunroof fuse 15a Vehicle communication interface module (vcim) (at center of rear package shelf, between rear speakers) Power Mirrors Wiring Diagram for Saturn Ion 3 2004 List of elements for Power Mirrors Wiring Diagram for Saturn Ion 3 2004: 19 (4cm from outside rear- view mirror switch breakout) s511 Batt Bcm elect fuse 20a Body control module (bcm) (at lower center of dash) Down Driver Driver outside rearview mirror (front outside of driver door) G301 (under driver's seat) Hot at all times Left Left/ right Logic Nca Outside rearview mirror switch Passenger Passenger outside rearview mirror (front outside of right front door) Right S533 Up/ down
POWER TOP/SUNROOF Power Top/Sunroof Wiring Diagram for Saturn Ion 3 2004 List of elements for Power Top/Sunroof Wiring Diagram for Saturn Ion 3 2004: 18 Body control module (bcm) (at lower center of dash) Close Early production G401 (under center of rear shelf) Hot in acc or run Late production Limit switch Mirrors system Off Open S375 Sp401 (in body harness, near left rear speaker) Sunroof fuse 15a Sunroof module (left of sun visor, in headliner) Sunroof switch Vent Vent off W/ automatic day/night mirrors
POWER WINDOWS Power Windows Wiring Diagram, Coupe for Saturn Ion 3 2004 List of elements for Power Windows Wiring Diagram, Coupe for Saturn Ion 3 2004: 15 Body control module (bcm) (at lower center of dash) Down Driver switch Driver window motor (in driver door) Driver window switch Express logic Front passenger switch Front passenger window motor (in right front door) Front passenger window switch G301 (under driver's seat) Hot in acc or run Pwr windows fuse 30a S360 S533 Tan Power Windows Wiring Diagram, Sedan for Saturn Ion 3 2004 List of elements for Power Windows Wiring Diagram, Sedan for Saturn Ion 3 2004: 26 Body control module (bcm) (at lower center of dash) C1 d C1 e C2 a C2 h Down Driver switch Driver window motor (in driver door) Driver window switch Express logic Front passenger switch Front passenger window motor (in right front door) Front passenger window switch G301 (under driver's seat) Hot in acc or run Left rear switch Left rear window motor (in left rear door) Left rear window switch Lockout switch Pwr windows fuse 30a Right rear switch Right rear window motor (in right rear door) Right rear window switch S360 S533 Tan
RADIO Radio Wiring Diagram, with Amplifier for Saturn Ion 3 2004 List of elements for Radio Wiring Diagram, with Amplifier for Saturn Ion 3 2004: 77 (2.0l) (2.2l) (at center of rear package shelf, between rear speakers) (if equipped) vehicle communication (in driver's door harness, 19 cm from driver's outside rearview mirror breakout) (in right front passenger's door harness, 13 cm from right front door tweeter speaker breakout) A10 A11 A12 Acc volt Antenna sig Audio amplifier (in trunk, below rear shelf) Audio cmmon Audio out (-) B10 B11 B12 B7 dimming Bare Battery volt Body control module (bcm) (at lower center of dash) Case interior lights dimming Cellular sig Cellular telephone mute sig Cellular telephone voice sig Coax Data link connector (dlc) (under lower left side of dash) Drain wire G201 (behind lower left side of dash, left of steering column) G401 (under center of rear shelf) Ground Hot at all times Hot in acc or run I/p lamp sply volt Interface module (vcim) Interior lights system L audio sig (+) L subwoofer (+) L subwoofer (-) Left front door speaker Left front door tweeter speaker Left rear speaker Lf spkr out (+) Lf spkr out (-) Logic Low reference Low speed gmlan serial data Lr spkr out (+) Lr spkr out (-) Nca Park lamp sply volt Pnk R audio sig (+) R subwoofer out (+) R subwoofer out (-) Radio Radio (acc) fuse 10a Radio (batt 1) fuse 10a Radio antenna Radio on sig Radio prem audio fuse 21 20a Remote radio l audio sig Rf spkr out (+) Rf spkr out (-) Right front door speaker Right front door tweeter speaker Right rear speaker Rr spkr out (+) Rr spkr out (-) S250 S555 S557 (in driver's door harness, 11.5 cm from driver's out side rearview mirror breakout) S656 S658 (in right front passenger's door harness, 5.5 cm from right front door tweeter speaker breakout) Satellite radio circuit Serial data Sp401 (in body harness, near left rear speaker) Tan Underhood fuse block (2.2l: at left rear side of engine compt) Radio Wiring Diagram, without Amplifier for Saturn Ion 3 2004 List of elements for Radio Wiring Diagram, without Amplifier for Saturn Ion 3 2004: 56 (at center of rear package shelf, between rear speakers) (if equipped) vehicle communication interface module (vcim) A10 A11 A12 Acc volt Antenna sig Audio cmmon B10 B11 B12 Bare Battery volt Body control module (bcm) (at lower center of dash) Case Cellular sig Cellular telephone mute sig Cellular telephone voice sig Coax Data link connector (dlc) (under lower left side of dash) Dimming Drain wire G201 (behind lower left side of dash, left of steering column) Ground Hot at all times Hot in acc or run I/p lamp sply volt Interior lights dimming Interior lights system L audio sig (+) Left front door speaker Left rear speaker Lf spkr out (+) Lf spkr out (-) Logic Low reference Lr spkr out (+) Lr spkr out (-) Nca Park lamp sply volt R audio sig (+) Radio Radio (acc) fuse 10a Radio (batt 1) fuse 10a Radio antenna Rf spkr out (+) Rf spkr out (-) Right front door speaker Right rear speaker Rr spkr out (+) Rr spkr out (-) S250 Satellite radio circuit Serial data Serial data low speed gmlan Tan Voice sig cellular telephone Satellite Radio Wiring Diagram for Saturn Ion 3 2004 List of elements for Satellite Radio Wiring Diagram for Saturn Ion 3 2004: 23 Ant in (sat) Ant in (terr) Audio cmmon Audio common Bare Battery volt Body control module (bcm) (at lower center of dash) C5 a Coax Digital radio antenna Digital radio receiver Drain wire G401 (under center of rear shelf) Gm lan serial data Ground Hot at all times L audio sig (+) Low speed b Onstar fuse 10a R audio sig (+) Radio S417 Serial data
SHIFT INTERLOCK Ignition Lock Solenoid Wiring Diagram for Saturn Ion 3 2004 List of elements for Ignition Lock Solenoid Wiring Diagram for Saturn Ion 3 2004: 7 (behind lower left side of dash, left of steering column) g203 Body control module (bcm) (at lower center of dash) Hot in acc or run Ignition lock cylinder control actuator (under top of steering column) Ignition lock cylinder control switch (on steering column, part of ignition lock cylinder) S355 Wiper sw fuse 10a Shift Interlock Wiring Diagram for Saturn Ion 3 2004 List of elements for Shift Interlock Wiring Diagram for Saturn Ion 3 2004: 32 5 speed a/t A/t shift lock control solenoid (under center console, on left side of shifter) Battery Bcm clas 2 serial data Bcm elect fuse 20a Body control module (bcm) (at lower center of dash) Class 2 serial data Computer data lines system Cvt G105 (on lower left rear of engine, above starter) G203 (behind lower left side of dash, left of steering column) Ground Hot at all times Hot in run or start Logic Park brake switch Park/neutral position (pnp) switch (on top of transaxle) Pnk R l S175 S355 Shift lock solenoid Sw sig a Sw sig b Sw sig c Sw sig p Switch signal Tan Tan/ Trans1 fuse 10a Transmission control module (tcm) (at left rear of engine compt) Underhood fuse block (2.2l: at left rear side of engine compt)
STARTING/CHARGING Charging Wiring Diagram for Saturn Ion 3 2004 List of elements for Charging Wiring Diagram for Saturn Ion 3 2004: 24 (in engine harness, 5 cm from engine harness breakout) 2.0l 2.2l Battery Body control module (bcm) (at lower center of dash) Charge indicator Cluster fuse 7.5a Cycle sig Engine control module (ecm) (2.2l (vin f)) powertrain control module (pcm) (2.0l) (2.2l: at left side of engine compartment) (2.0l: at rear of engine, near coolant overflow container) G201 (behind lower left side of dash, left of steering column) G502 (at right rear side of trunk) Gen field duty Gen turn on sig Generator Gnd Hot at all times Instrument panel cluster (ipc) Logic Red S150 S250 Serial data (class ii) Starter (at lower left rear of engine) Underhood fuse block (2.2l: at left rear side of engine compt) Starting Wiring Diagram for Saturn Ion 3 2004 List of elements for Starting Wiring Diagram for Saturn Ion 3 2004: 40 (5 spd (a/t)) (cvt) 5v ref Acc Armature Battery Bcm class 2 serial data Body control module (bcm) (at lower center of dash) Charging circuit Clutch start switch (below left side of dash, on clutch pedal bracket) Crank fuse 46 30a Cruise fuse 7.5a Early production Ecm class 2 serial data Ecm cont relay 31 Engine control module (ecm) (at left side of engine compartment) G502 (at right rear side of trunk) Hold-in windings Hot in acc or run Ign fuse 11 10a Ignition switch Late production Lock Logic M/t Off Off/run/crank voltage Park/neutral position (pnp) switch (on top of transaxle) Pnk Pnp/clutch start switch signal Power distribution system Pull-in windings Red Run Run/ crank fuse 38 30a Run/ crank relay 28 Start Starter Starter relay coil control Underhood fuse block (at left rear side of engine compartment)
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram for Saturn Ion 3 2004 List of elements for Supplemental Restraints Wiring Diagram for Saturn Ion 3 2004: 49 (behind lower left side of dash, left of steering column) g201 A10 A11 A12 A13 A14 A15 A16 A17 A18 Air bag fuse 10a Air bag indicator Body control module (lower center of dash, just below hvac control assembly) Case ground Class 2 serial data Coupe Data link connector (lower left dash, near hood latch) Electronic power steering assembly (behind lower left side of dash, attached to steering column) Ground High control Hot in run & start Ignition Inflatable restraint ip module Inflatable restraint sensing & diagnostic module (sdm) (under center console, behind emergency brake) Inflatable restraint steering wheel module Inflatable restraint steering wheel module coil Instrument panel cluster Left front seat belt pretensioner Left inflatable restraint roof rail module (at left rear side of roof bracket, in "c" pillar) Left inflatable restraint side impact sensor (in lower corner of driver's door) Left seat belt switch (open with driver seat belt buckled) (in left seat belt buckle assembly) Logic Low control Nca Pnk Right front seat belt pretensioner Right inflatable restraint roof rail module (at right rear side of roof bracket, in "c" pillar) Right inflatable restraint side impact sensor (in lower corner of passenger's door) Seat belt switch Sedan Serial data Shorting bar Signal Solid state Stage 1 Stage 2 Tan Twisted pair wires Voltage
TRANSMISSION
2.2L VIN F 2.2L VIN F, A/T Wiring Diagram, Coupe (1 of 2) for Saturn Ion 3 2004 List of elements for 2.2L VIN F, A/T Wiring Diagram, Coupe (1 of 2) for Saturn Ion 3 2004: 36 Abs & exterior lights Automatic trans- mission input shaft speed sensor (at iss) Automatic trans- mission output shaft speed sensor (at oss) Automatic transmission Automatic transmission fluid temp (tft) sensor Battery Body control module (at left rear of engine compt, attached to master cylinder) Cruise control E10 Early production Ecm/ tcm fuse 1 10a G105 (lower left rear of eng) Ground Hot at all times Hot in run or start Ign 1 volt Late production Line pressure control solenoid valve Module leadframe Pnk Ratio control motor Red S175 Ser data + Ser data - Stop fuse 15a Stop lmp sw Tan Tcc enable solenoid valve Tcc pressure control solenoid valve Trans 1 fuse 14 10a Trans 2 fuse 13 10a Transmission control module (tcm) (at left rear of engine compt, near strut tower) Transmission fluid pressure sensor Underhood fuse block (at left rear side of engine compt) Upper stop lamp switch (below left side of dash, attached to brake pedal bracket) 2.2L VIN F, A/T Wiring Diagram, Coupe (2 of 2) for Saturn Ion 3 2004 List of elements for 2.2L VIN F, A/T Wiring Diagram, Coupe (2 of 2) for Saturn Ion 3 2004: 36 5 volt ref At iss hi sig At iss lo sig Batt Class 2 data Computer data lines system Engine control module (at left side of engine compt) Instrument cluster Line press hi Line press lo Logic Low ref Message center Oss hi sig Oss low sig Park/neutral position (pnp) switch (on top of transaxle) Pnk Ratio ctrl a1 Ratio ctrl a2 Ratio ctrl b1 Ratio ctrl b2 Ser data + Ser data - Tan Tcc press hi Tcc press lo Tcc sol hi Tcc sol low Tfp sens Tft sens low Tft sens sig Transmission control module (tcm) (at left rear of engine compt, near strut tower) Trs sig a Trs sig b Trs sig c Trs sig p 2.2L VIN F, A/T Wiring Diagram, Sedan for Saturn Ion 3 2004 List of elements for 2.2L VIN F, A/T Wiring Diagram, Sedan for Saturn Ion 3 2004: 48 At iss high At iss low Automatic transmission Automatic transmission fluid temp (tft) sensor Automatic transmission input shaft speed sensor (at iss) (on top of transaxle) Automatic transmission output speed sensor Batt Battery C100 Class 2 data Computer data lines system Ecm/ tcm fuse 1 10a Engine control module (at left side of engine compt) G105 (low left rear of eng) Ground Hot at all times Hot in run or start Ign 1 volt Instrument cluster Line press Line pressure control solenoid (slt) Logic Message center Park/neutral position (pnp) switch (on top of transaxle) Pnk S175 Ser data + Ser data - Shift press Shift pressure control solenoid (sls) Shift sol 1 Shift sol 2 Shift sol 3 Shift sol 4 Shift sol 5 Tan Tcc press Tcc pressure control solenoid (slu) Tft sens Trans 1 fuse 14 10a Transmission control module (tcm) (at left rear of engine compt, near strut tower) Trs sig a Trs sig b Trs sig c Trs sig p Underhood fuse block (at left rear side of engine compt) Vss high Vss low
TRUNK, TAILGATE, FUEL DOOR Trunk Release Wiring Diagram for Saturn Ion 3 2004 List of elements for Trunk Release Wiring Diagram for Saturn Ion 3 2004: 25 Ajar switch B(+) Bcm (pwr) fuse 15a Body control module (bcm) (at lower center of dash) Compartment light breakout) Early production G301 (under driver's seat) G403 (under center of rear shelf) G403 (under center of rear shelf) Gnd Hot at all times Interior lights system Late production Logic Rear compartment lid release actuator (in rear compt lid) Rear compartment lid release switch Release actuator S337 (in body harn, 7.5cm from auxiliary power outlet breakout) S351 S990 Sp403 (in body harn, near right rear speaker) Trunk ajar indicator control Trunk release motor control Valet switch W/ rke
WARNING SYSTEMS Warning Systems Wiring Diagram for Saturn Ion 3 2004 List of elements for Warning Systems Wiring Diagram for Saturn Ion 3 2004: 36 A11 A14 Acc Auto Body control module (bcm) (at lower center of dash) Chime Class 2 (sdm) Class 2 serial data Driver door jamb switch (left front of dash, on outer trim cover) Driver dr jamb sw sig Exterior lights system G201 (behind lower left side of dash, left of steering column) Head Hot at all times Ign sw fuse 2a Ignition switch Inflatable restraint sensing & diagnostic module (sdm) (under center console, behind emergency brake) Instrument panel cluster (ipc) Key-in switch Left seat belt switch (in left seat belt buckle assembly) Left turn sig lp pwr Lock off Logic Nca Off Park Park fuse 15a Park lamps pwr Right turn sig lp pwr Run S221 S250 Seat belt ind Seat belt switch Start Turn signal/ multi- function switch
WIPER/WASHER Wiper/Washer Wiring Diagram for Saturn Ion 3 2004 List of elements for Wiper/Washer Wiring Diagram for Saturn Ion 3 2004: 42 (not used) A10 c3 B11 Body control module (bcm) (at lower center of dash) D10 c2 Early production F10 F11 G101 (behind left front headlamp) High Hot at all times Hot in acc or run Int L10 L11 Late production Low M11 Mist Off Park switch Q10 Q11 R11 Red S101 Sp101 (in forward lamp harness, near left headlamp) Underhood fuse block (2.2l) at left rear side of engine compartment) Wash Windshield washer fluid pump (on bottom of washer fluid reservoir) Windshield washer pump control Windshield wiper motor assembly (at left rear side of engine compartment) Windshield wiper motor park switch signal Windshield wiper switch signal 1 Windshield wiper switch signal 2 Windshield wiper/washer switch Wiper 1 relay Wiper 2 relay Wiper diode Wiper fuse 19 25a Wiper sw fuse 10a X10
