Diagram sections — 29 (60 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY CONTROL MODULES COMPUTER DATA LINES COOLING FAN CRUISE CONTROL DEFOGGERS ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS 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 Compressor Wiring Diagram for Chevrolet Impala 2003 List of elements for Compressor Wiring Diagram for Chevrolet Impala 2003: 21 +5v reference A/c compressor clutch A/c compressor relay A/c press signal A/c refrigerent pressure sensor (left side of engine compt, on liquid line) A/c rly fuse 10a Comp control Computer data lines system E11 F11 G113 (3.8l) g117 (3.4l) (on transaxle stud, near starter) Hot at all times Hot in run Low reference Nca Pnk Powertrain control module (left front side of engine compt, in air cleaner assembly) S158 Serial data Underhood junction block (bottom) (forward of right front strut tower) Underhood junction block (top) (forward of right front strut tower) Manual A/C Wiring Diagram for Chevrolet Impala 2003 List of elements for Manual A/C Wiring Diagram for Chevrolet Impala 2003: 86 (forward lamp harn, near right headlamp) (fuel inj jumper harn, midway between fuel inj no 3 breakout and (map) sensor breakout) (fwd lamp harn, 18.5 cm from g101 breakout) (i/p harn, 8 cm from ignition sw breakout) s229 (left side of heater-a/c assembly) air temperature actuator (left) (under center of dash) (under left side of dash) splice pack sp205 +5v reference 3.4l 3.8l A/c blo fuse 20a A/c blo fuse 25a A/c compressor clutch A/c compressor clutch diode (in wiring harn, 10 cm from a/c compressor clutch) A/c compressor relay A/c cruise fuse 10a A/c press signal A/c refrigerent pressure sensor (left side of engine compt, on liquid line) A/c request A/c request sig A/c rly fuse 10a Air temperature actuator (right) (right side of heater-a/c assembly) B10 Battery Blower motor Blower motor relay Blower motor resistor assembly (on hvac module, below blower motor) Body control module (behind left side of dash) C1 f6 C10 Comp control D4 c1 Data link connector (under dash, right side of steering column) Defog rly ctrl Defogger system Dic/ rke fuse 10a E11 Ect ground Ect signal Engine controls (map sensor) Engine coolant temperature (ect) sensor (left rear of engine) F11 F5 c1 Fan cont 1 fuse 25a Fan cont 2 & 3 fuse 25a Fan control 1 relay Fan control 2 relay Fan control 3 relay G101 (top left front of radiator support) G113 (3.8l) g117 (3.4l) (on transaxle stud, near starter) G201 (right side of steering column) G202 G202 (under center of dash) Gnd High speed Hot at all times Hot in run Hvac control module I/p junction block (left) (behind left side of dash) I/p junction block (right) (behind right side of dash) I/p lamp sply volt Ign Ign 3 volt Interior lights system Left cooling fan Lft temp dr ctrl Low reference Low speed Nca Nca nca Off Off blwr mtr ctrl Pnk Pos Powertrain control module (left front side of engine compt, in air cleaner assembly) Right cooling fan Rt temp dr ctrl S121 S148 S158 S175 S216 Serial data Tan Underhood junction block (bottom) (right side of engine compt, forward of strut tower) Underhood junction block (top) (forward of right front strut tower)
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram for Chevrolet Impala 2003 List of elements for Anti-lock Brakes Wiring Diagram for Chevrolet Impala 2003: 70 (below driver door opening, rear of left "a" pillar) (under dash, to right of steering column) (under dash, to the right of steering column) A10 A11 A12 Above parking brake lever) Abs ind Abs/pcm fuse 10a B10 B11 Battery Body control module (bcm) (behind left side of dash, Brake fluid level switch (in master cylinder reservoir) Brake ind Brake pressure modulator valve Brk sw fuse 15a C10 C11 Data link connector (dlc) (below left side of dash, right of steering column) Delivered torque Desired torque E12 Electronic brake control module (ebcm) (in left rear of eng compt, on abs G151 (on top left frame rail) G201 G201 (under dash, to right of steering column) G203 G301 Ground Hot at all times Hot in on or start Hydraulic modulator) Ignition Impala Instrument cluster Interior lights system Left front wheel spd (hi) Left front wheel spd (lo) Left front wheel speed sensor Left i/p junction block (left side of dash, behind access panel) Left rear wheel spd (hi) Left rear wheel spd (lo) Left rear wheel speed sensor Monte carlo Nca Pnk Powertrain control module (pcm) (in air cleaner box) Pump motor Red Right front wheel spd (hi) Right front wheel spd (lo) Right front wheel speed sensor Right i/p junction block (right side of dash, behind access panel) Right rear wheel spd (hi) Right rear wheel spd (lo) Right rear wheel speed sensor S169 S190 S236 S253 S320 Serial data signal Splice pack sp205 (taped to harn, next to left i/p accessory wiring junction block) Stop lamp sw out Stoplamp switch (on brake pedal support) Tan Trac off ind Traction control switch Vent tube
ANTI-THEFT Anti-theft Wiring Diagram for Chevrolet Impala 2003 List of elements for Anti-theft Wiring Diagram for Chevrolet Impala 2003: 81 470 ohms A10 A11 A12 Accy sig in Ajar switch B11 B12 Backup lps rly ctrl Bcm b+ Bcm fuse 10a Body control module (behind left side of dash) C420 Class 2 data line Class 2 serial data Clstr/bcm fuse 10a D12 Data Data link connector (below left side of dash, right of steering column) Dk lk fuse 20a Door ajar in Door locks b+ Driver door ajar in Exterior lamp system Exterior lights system G201 (under dash, to right of steering column) G203 (under dash, to right of steering column) G302 (below passenger front door opening, rear of right "a" pillar) Gnd Headlamps rly ctrl Headlights system Horn relay ctrl Horns system Hot at all times Hot in accy or on Hot in accy, on or start Hot in on or start Ign 0 sig in Ign 1 sig in Ignition lock cylinder Instrument cluster Key switch signal Keyless entry data Keyless entry serial data Left door lock cylinder switch Left door lock switch Left front side door lock Left i/p junction block Left rear side door lock Lh htd st/bcm fuse 15a Load b+ Lock Lock/unlock in Nca Passlock b+ Passlock data in Passlock gnd Passlock sensor (part of ignition switch) Pcm/bcm clstr fuse 10a Pnk Power distribution system Powertrain control module (in air cleaner box) Rear compartment lid ajar switch Remote control door lock receiver (upper center of dash) Right door lock switch Right front side door lock Right i/p junction block Right rear side door lock S236 S253 S322 S420 S440 S900 Security indicator Splice pack sp205 (next to left accessory wiring junction block) Stop fuse 10a Trunk ajar sw Unlock W/ decklid release W/o entrapment protection
BODY CONTROL MODULES Body Control Modules Wiring Diagram for Chevrolet Impala 2003 List of elements for Body Control Modules Wiring Diagram for Chevrolet Impala 2003: 91 (i/p wiring harn, 7.5 cm from bcm breakout) s217 A/c request sig A/t shift lock sol sup volt A10 A11 A12 Accessory voltage Air conditioning system Anti-lock brakes system Anti-theft system B10 B11 B12 Backup lamp rly ctrl Battery positive voltage Bcm fuse 10a Body control module (bcm) (behind left side of dash, above parking brake lever) Class 2 serial data Clstr/ bcm fuse 10a Computer data lines system Courtesy lamp low ctrl Courtesy lamp rly ctrl Cruise control module (on left strut tower) Defogger system Door key sw sig Door lock actr lock ctrl Door lock actr unlock ctrl Door locks system Door opem sw sig Dr lk fuse 10a Dr lock sw sig Driver dlk actr unlock ctrl Driver door open sw sig Drl ambient light sen lo ref Drl ambient light sen sig Drl rly ctrl Exterior lights system Fog lamp rly ctrl Front fog lamp sw sig G201 (under dash, to the right of steering column) G203 (under dash, to the right of steering column) Ground Headlamp lamp high beam sig Headlamp sw sig Headlights system Hi beam headlamp rly ctrl Horn rly ctrl Horns system Hot at all times Hot in acc or on Hot in acc, on or start Hot in on or start Ignition 0 voltage Ignition 1 voltage Ignition key alarm switch Ignition switch Int lamp defeat sw sig Interior lamp ctrl Interior lights system Key-in ign sw sig Keyless entry serial data Left i/p junction block Left i/p junction block Lh htd st/bcm fuse 15a Load management ctrl Park brake switch (at base of parking brake assembly) Park lamp rly ctrl Park lamp sw sig Pcm/bcm cluster fuse 10a Pnk Power distribution system Power distribution system (rap) Powertrain control module (in air cleaner box) Remote keyless entry circuit S236 S253 Security syst sen sup volt Security system sen low ref Security system sen sig Shift interlock system Stop fuse 10a Surveillance mode switch (emergency vehicle only) Tan Traction ctrl sw sig Trunk ajar sw sig Trunk rel rly ctrl Trunk release sw sig Trunk, tailgate, fuel doors system Vehicle speed sig Vss in Vss out
COMPUTER DATA LINES Computer Data Lines Wiring Diagram for Chevrolet Impala 2003 List of elements for Computer Data Lines Wiring Diagram for Chevrolet Impala 2003: 26 Auxiliary power drop connector (taped to harness, above right kick panel) Body control module (behind left side of dash, above parking brake lever) C1 e8 C2 c8 C3 d8 Cd player- remote play- back device Clstr/bcm fuse 10a Data class 2 Data link connector (dlc) (below left side of dash, right of steering column) Driver information center (dic) (in front center of roof) Electronic brake control module (in left rear of engine compt, on abs hydraulic modulator) Except police vehicle & taxi G201 (on left side of brake pedal bracket) G203 (on right side of brake pedal bracket) Hot at all times Inflatable restraint sensing & diagnostic module (below passenger's seat) Instrument panel cluster (ipc) Left i/p junction block (left side of dash, behind access panel) Onstar module (w/ vehicle commun- ication system) Powertrain control module (in air cleaner box) Radio Right i/p junction block (right side of dash, behind access panel) S236 S253 Splice pack sp205 W/ remote cd wiring provisions
COOLING FAN Cooling Fan Wiring Diagram for Chevrolet Impala 2003 List of elements for Cooling Fan Wiring Diagram for Chevrolet Impala 2003: 26 (fuel inj jumper harn, midway between fuel inj no 3 breakout and (map) sensor breakout) (fwd lamp harn, 18.5 cm from g101 breakout) (fwd lamp harn, 31.5 cm from ambient air temp sensor breakout) 3.4l 3.8l B10 C10 Ect sig Engine controls system (map sensor) Engine coolant temperature (ect) sensor (left rear of engine, near coolant outlet) Fan cont 1 fuse 25a Fan cont 2 & 3 fuse 25a Fan control 1 relay Fan control 2 relay Fan control 3 relay G101 (top left front of radiator support) High spd Hot at all times Left cooling fan Low spd Powertrain control module (in air cleaner assembly) Right cooling fan S121 S148 S175 Underhood junction block (bottom) (right side of engine compt, forward of strut tower)
CRUISE CONTROL Cruise Control Wiring Diagram for Chevrolet Impala 2003 List of elements for Cruise Control Wiring Diagram for Chevrolet Impala 2003: 44 A/c cruise fuse 10a All times Anti-lock brakes system B11 Body control module (behind left side of dash) Brake sig input Brk sw fuse 15a C11 Cruise control module (on left strut tower) Cruise control on/off switch Cruise control release switch (on brake pedal support) Cruise fuse 2a Cruise inhibit Cruise on/off Cruise release sig Cruise set/coast Disable output Engage ouput Engaged input Exterior lights system G113 (lower left of engine, on transaxle stud) Ground Hot at Hot in run Ignition Inflatable restraint steering wheels module coil Left i/p junction block Left steering wheel controls Nca Powertrain control module (pcm) (in air cleaner box) Resume/ accel Resume/accel Right i/p junction block Right steering wheel controls S106 S217 (i/p harness, approx 7.5 cm from the breakout for the body control module) Set/ coast Stoplamp switch (on brake pedal support) Turn signal/ multi-function switch Vehicle speed input Vehicle speed out Vehicle speed sensor (vss) (right rear of engine compt, end of transaxle) Vss high Vss low
DEFOGGERS Defoggers Wiring Diagram for Chevrolet Impala 2003 List of elements for Defoggers Wiring Diagram for Chevrolet Impala 2003: 35 (at base of left "b" pillar) g301 (at base of right "b" pillar) g302 (behind left side of dash, on left side of brake pedal bracket) g201 (on right side of "b" pillar) g313 A/c cruise fuse 10a B10 Body control module (bcm) (behind left side of dash) D10 D11 Driver outside rearview mirror F10 Hot at all times Hot in on Htd mir fuse 10a Hvac control module Left i/p junction block (end of dash, on left door opening) Load management control Nca Passenger outside rearview mirror Power distribution system Radio antenna module (left "c" pillar) Rear defog circuit breaker 30a Rear defog ind Rear defog momentary switch Rear defog relay Rear window Rear window defogger grid Red Right i/p junction block (end of dash, on right door opening) Rt ip 3 fuse 60a S229 S504 S604 Solid state Underhood junction block (bottom) (right side of engine compartment, forward of strut tower)
ENGINE PERFORMANCE
3.4L VIN E 3.4L VIN E, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Impala 2003 List of elements for 3.4L VIN E, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Impala 2003: 80 (left rear of engine, below icm) (on brake pedal support) stoplamp switch (on transaxle stud) (pin 14-15 not used) (pin 2-3 not used) (pin 23-27 not used) (pin 34-37 not used) (pin 39-42 not used) (pin 49-52 not used) (pin 66-67 not used) (pin 74-75 not used) (pin 77-78 not used) 1-2 shift sol 2-3 shift sol 24x ckp sens 3x ref high 3x ref low A/c press sens A/t fluid temp Abs/ pcm fuse 10a Battery Bypass Cmp signal Cooling fans system Crankshaft position sensor (7x) (lower right side of engine) Cruise disable Dfi fuse 15a Ebcm feed Egr control Egr sens Evap purge Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 5 Fuel inj 6 Fuel inj fuse 15a Fuel injectors G113 G117 High speed fan Ho2s 2 low Ho2s low Hot at all times Hot in on or start Iac b high Iat sens Ic control Ignition Ignition control module (top center rear of engine) Iss sens high Iss sens low Knock sens Left i/p junction block (left end of dash) Low ref Low speed fan Maf sens Map 5v ref Map sens Pcm fuse 15a Pcm ground Pcm,bcm/ cluster fuse 10a Pnk Pnk b Powertrain control module (pcm) (in air cleaner box) S106 S109 S158 Serial data Spark plugs Tan Tcc brake sw Tp sens Tr switch b Trans sol fuse 10a Underhood junction block (bottom) (right side of engine compt) Underhood junction block (top) (right side of engine compt) Vss high Vss low Vss output 3.4L VIN E, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Impala 2003 List of elements for 3.4L VIN E, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Impala 2003: 28 (below left side of dash, right of steering column) data link connector (engine harn, below intake plenum) 1-2 shift solenoid valve 2-3 shift solenoid valve A/c refrigerent pressure sensor (below accumulator) Automatic transaxle Automatic transaxle fluid pressure manual valve position switch Automatic transaxle temperature sensor Body control module (left side of dash) C113 Cruise control module (left strut tower) E pnk Electronic brake control module (left rear of engine compt) Engine coolant temperature (ect) sensor (near coolant outlet, left rear of eng) Knock sensor (bank 1) (lower left rear of engine, below exhaust manifold) Manifold absolute pressure sensor (on intake plenum) Pnk Pressure control solenoid valve Red S121 S217 (i/p harn, near bcm breakout) Splice pack sp205 (taped to harn, left end of dash) Tan Tcc Tcc pulse width modulation solenoid Throttle position (tp) sensor (on throttle assembly) Transaxle input shaft speed sensor Vehicle speed sensor (right rear of engine compt, end of transaxle) 3.4L VIN E, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Impala 2003 List of elements for 3.4L VIN E, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Impala 2003: 39 (in exhaust manifold, rear of engine) heated oxygen sensor 1 (in exhaust, behind catalytic converter) heated oxygen sensor 2 (left side of brake pedal bracket) g203 (on transaxle stud) (right end of dash) A tan B12 C10 D pnk D11 Eng devices fuse 10a Engine oil level switch (on oil pan) Engine oil pressure indicator switch (above starter) Evap canister purge solenoid (top rear of engine) F/pmp rly fuse 15a Fuel pump and sender assembly Fuel pump relay Fuel pump/ level sensor Fuel tank pressure sensor G113 G117 G302 (base of Hot at all times Hot in on or start Mass airflow sensor (in air intake plenum) Nca Oxy sen fuse 15a Pnk Pnk a Pnk c Right "a" pillar) Right i/p junction block c1 S106 S157 S158 S174 Tan Underhood junction block (bottom) (right side of engine compt) Underhood junction block (top) (right side of engine compt) 3.4L VIN E, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Impala 2003 List of elements for 3.4L VIN E, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Impala 2003: 82 (left rear wheelwell) (pin 12-15 not used) (pin 20-22 not used) (pin 40-41 not used) (pin 47-48 not used) (pin 51-54 not used) (pin 64-65 not used) (pins 36,38 not used) 5v ref a 5v ref b A/c clutch rly A/c refrig press A/c system Abs/ pcm fuse 10a Automatic transaxle C10 C113 Camshaft position sensor (left front of engine, below intake plenum) Ckp sens Cmp sens Crank rly Crankshaft position sensor (24x) (at end of crankshaft) Cruise status D11 Ebcm feed Ect sens Egr pos signal Egr val cntrl Evap can vent Evap canister vent solenoid Exhaust gas recirculation (egr) valve (top rear rear of engine) Ftp sens Ftp sens Fuel inj 4 Fuel level sens Fuel pump relay G113 Generator Generator l term Ho2s 1 high Ho2s 2 high Ho2s htr low Hot in on or start Hot in start Iac a high Iac valve a low Iac valve b Iat sens Idle air control (iac) valve (on throttle body) Ignition Instrument panel cluster Intake air temperature (iat) sensor (in air intake duct) Left i/p junction block (left end of dash) Low ref Malfunction indicator lamp Map sens Mil control Oil level sw Oil press sw Pc sol high Pc sol low Pcm (crank) fuse 10a Pcm crank pwr Pcm,bcm/ cluster fuse 10a Pnk Powertrain control module (pcm) (in air cleaner box) Red Red b Red e S106 S169 (w/ abs) Starting system Tan Tan b Tcc pwm sol Tcc release sw Tft sens Tp sens Tr switch c Tr switch d Tr switch p Trans- mission internal mode switch
3.8L VIN K 3.8L VIN K, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Impala 2003 List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Impala 2003: 83 (ign harn, top of eng, near icm) (left rear of engine, below icm) (on brake pedal support) stoplamp switch (pin 14-15 not used) (pin 2-3 not used) (pin 23-27 not used) (pin 35-37 not used) (pin 39-42 not used) (pin 49-52 not used) (pin 66-67 not used) (pin 74-75 not used) (pin 77-78 not used) 1-2 shift sol 18x ref 2-3 shift sol 3x ref A/c press sens A/t fluid temp Abs/ pcm fuse 10a Bank 1 ks sig Bank 2 ks sig Battery Bypass Camshaft position (cmp) sensor (right side of engine) Cmp signal Cooling fans system Crankshaft position (ckp) sensor (at end of crankshaft) Cruise disable Dfi mdl fuse 15a Ebcm feed Ect sens Egr control Egr sens Evap purge Fuel inj 1 Fuel inj 2 Fuel inj 4 Fuel inj 5 Fuel inj 6 Fuel inj fuse 15a Fuel injectors G113 High speed fan Ho2s 1 low Ho2s 2 low Hot at all times Hot in on or start Iac b high Iat sens Ign control Ignition Ignition control module (top left front of eng) Iss sens high Iss sens low Left i/p junction block (left end of dash) Low speed fan Maf sens Map 5v ref Map sens Not used Pcm fuse 15a Pcm ground Pcm,bcm/ cluster fuse 10a Pnk Pnk p Powertrain control module (pcm) (in air cleaner box) Ref low S106 S109 S144 S145 Serial data Spark plugs Tan Tcc brake sw Tp sens Tr switch b Trans sol fuse 10a Underhood junction block (bottom) (right side of engine compt) Underhood junction block (top) (right side of engine compt) Vss high Vss low Vss output 3.8L VIN K, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Impala 2003 List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Impala 2003: 27 (below left side of dash, right of steering column) data link connector (i/p harn, near bcm breakout) s217 1-2 shift solenoid valve 2-3 shift solenoid valve A/c refrigerent pressure sensor (below accumulator) Automatic transaxle Automatic transaxle fluid pressure manual valve position switch Automatic transaxle input shaft speed sensor Automatic transaxle temperature sensor Body control module (left side of dash) C113 Cruise control module (left strut tower) E pnk Electronic brake control module (left rear of engine compt) Engine coolant temperature (ect) sensor (below coolant outlet, left rear of eng) Knock sensor bank 1 (lower left side of engine, near starter) Knock sensor bank 2 (lower right side of engine) Manifold absolute pressure sensor (on intake plenum) Pnk Pressure control solenoid valve Red Splice pack sp205 (taped to harn, left end of dash) Tan Tcc Tcc pulse width modulation solenoid Throttle position (tp) sensor (on throttle assembly) Vehicle speed sensor (right rear of engine compt, end of transaxle) 3.8L VIN K, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Impala 2003 List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Impala 2003: 38 (engine harn, right front of engine near c112) (in exhaust manifold, rear of engine) heated oxygen sensor 1 (in exhaust, post catalytic converter) heated oxygen sensor 2 (left side of brake pedal bracket) g203 (on transaxle stud) A tan B12 C10 D pnk D11 Eng devices fuse 10a Evap canister purge solenoid (top front of engine) F/pmp rly fuse 15a Fuel pump and sender assembly Fuel pump relay Fuel pump/ level sensor Fuel tank pressure sensor G113 G302 (base of Hot at all times Hot in on or start Mass airflow sensor (top of throttle body) Nca Of dash) Oxy sen fuse 15a Pnk Pnk a Pnk c Right "a" pillar) Right i/p junction block (right end c1 S106 S131 S157 S158 S174 Tan Under- hood junction block (bottom) (right side of engine compt) Underhood junction block (top) (right side of engine compt) 3.8L VIN K, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Impala 2003 List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Impala 2003: 79 (on transaxle stud) (pin 12-15 not used) (pin 20-22 not used) (pin 36-38 not used) (pin 40-41 not used) (pin 47-48 not used) (pin 51-54 not used) (pin 64-65 not used) (pin 70-74 not used) 5v ref a 5v ref b A/c clutch rly A/c refrig press A/c system Abs/ pcm fuse 10a Automatic transaxle C10 C113 Crank rly Cruise status D11 Ebcm feed Ect sens Egr pos signal Egr val cntrl Engine oil level switch (on oil pan) Engine oil pressure indicator switch (above starter) Evap can vent Evap canister vent solenoid (left rear wheelwell) Exhaust gas recirculation (egr) valve (top right rear of engine) Ftp sens Ftp sens Fuel inj 3 Fuel level sens Fuel pump relay G113 Generator Generator l term Ho2s 1 high Ho2s 2 high Hot in on or start Hot in start Iac a high Iac valve a low Iac valve b Iat sens Idle air control (iac) valve (on throttle body assembly) Ignition Instrument cluster Intake air temperature (iat) sensor (in air intake duct) Left i/p junction block (left end of dash) Malfunction indicator lamp Map sens Mil control Oil level sw Oil press sw Pc sol high Pc sol low Pcm (crank) fuse 10a Pcm crank pwr Pcm,bcm/ cluster fuse 10a Pnk Powertrain control module (pcm) (in air cleaner box) Red Red b Red e S106 S169 (w/ abs) Starting system Tan Tan b Tcc pwm sol Tcc release sw Tft sens Tp sens Tr switch c Tr switch d Tr switch p Trans- mission internal mode switch
EXTERIOR LIGHTS Accessory Lamps Wiring Diagram for Chevrolet Impala 2003 List of elements for Accessory Lamps Wiring Diagram for Chevrolet Impala 2003: 23 A11 Body control module (behind left side of dash) Dic/ rke fuse 10a Driver information center (front center of roof headliner) Emergency vehicle rear compartment lid lamps relay G302 (at base of right "b" pillar) Hot at all times Interior lights system Left emergency vehicle rear compartment lid lamp Left spot lamp Left spot lmp fuse 15a Nca Rear compartment lid ajar switch (center of rear compartment lid, on latch) Right emergency vehicle rear compartment lid lamp Right i/p junction block Right side of rear compt) Right spot lamp Right spot lmp fuse 15a S900 Tan Underhood junction block W/ driver information display center W/ rear compt lid emergency lamp package Back-up Lamps Wiring Diagram, with Police Or Emergency Vehicle Option for Chevrolet Impala 2003 List of elements for Back-up Lamps Wiring Diagram, with Police Or Emergency Vehicle Option for Chevrolet Impala 2003: 27 (behind left side of dash) body control module (lower left rear of eng, on transaxle stud) Automatic transaxle Automatic transaxle internal mode switch B/u lamp fuse 10a Back-up lamps relay Back-up lp rly ctrl D10 Dic/rke fuse 10a Emergency vehicle rear lamps flasher (under right side of package shelf) G113 G302 (at base of right "b" pillar) Hot at all times Ims sig a Ims sig b L10 Left back- up lamp N10 Nca b/u lmp pwr Powertrain control module (in air cleaner box) Right back- up lamp Right i/p junction block S108 S901 S902 Serial data Splice pack sp205 (next to left i/p accessory wiring junction block, tape to harness) Back-up Lamps Wiring Diagram, without Police Or Emergency Vehicle Option for Chevrolet Impala 2003 List of elements for Back-up Lamps Wiring Diagram, without Police Or Emergency Vehicle Option for Chevrolet Impala 2003: 25 (behind left side of dash) body control module (lower left rear of eng, on transaxle stud) Automatic transaxle Automatic transaxle internal mode switch B/u lamp fuse 10a Back-up lamps relay Back-up lp rly ctrl D10 Dic/rke fuse 10a G113 G302 (at base of right "b" pillar) Hot at all times Ims sig a Ims sig b L10 Left back- up lamp N10 Powertrain control module (in air cleaner box) Right back- up lamp Right i/p junction block S108 S901 S902 Serial data Splice pack sp205 (next to left i/p accessory wiring junction block, tape to harness) Exterior Lamps Wiring Diagram, with Police Or Emergency Vehicle Option for Chevrolet Impala 2003 List of elements for Exterior Lamps Wiring Diagram, with Police Or Emergency Vehicle Option for Chevrolet Impala 2003: 81 (forward lamp wiring harness, left of the right headlamp connector breakout) (not used) (rear body wiring harn, right rear side of rear compt) A10 A11 A12 Abs system Aux pwr fuse 20a B10 B11 Back-up lamps ciruit Body control module (bcm) (behind left side of dash) Brake sw fuse 15a C1 c1 C10 C11 Center high mounted stop lamp (chmsl) Cruise control system E10 Emergency vehicle rear lamps flasher (under right side of package shelf) F12 Front park lp fuse 15a G101 (left radiator support) G201 (behind left side of dash, on left side of brake pedal) G203 (behind left side of dash, on right side of brake pedal) G302 (at base of right "b" pillar) H11 H12 Haz sw fuse 15a Hazard Hazard sig sw out Hazard switch Head Headlamp switch Hot at all times Hot in run or start Instrument panel cluster (ipc) Interior lights K11 K12 Led Left Left emergency vehicle rear window panel lamp Left front park/ turn lamp Left headlamp Left i/p junction block Left license lamp Left tail lamp Left turn ind Nca stop lmp sig nca lr lamp pwr nca rr lamp pwr nca b/u lmp pwr nca ground nca Normal Off Park Park lp relay Pillar) g302 Pnk Rear park lp fuse 15a Red Right Right emergency vehicle rear window panel lamp Right front park/ turn lamp Right headlamp Right i/p junction block Right license lamp Right tail lamp Right turn ind Rt i/p 1 fuse 60a S150 S176 S229 S253 S400 S900 Stop light switch Timer Turn Turn sig sw out Turn signal fuse 15a Turn signal multi- function switch Turn/ stop Underhood junction block Exterior Lamps Wiring Diagram, without Police Or Emergency Vehicle Option for Chevrolet Impala 2003 List of elements for Exterior Lamps Wiring Diagram, without Police Or Emergency Vehicle Option for Chevrolet Impala 2003: 70 (forward lamp wiring harness, left of the right headlamp connector breakout) (rear body wiring harn, right rear side of rear compt) s400 A10 A11 Abs system B10 B11 Body control module (bcm) (behind left side of dash) Brake sw fuse 15a C11 Center high mounted stop lamp Cruise control system E10 F12 Front park lp fuse 15a G101 (left radiator support) G201 (behind left side of dash, on right side of brake pedal) G203 (behind left side of dash, on right side of brake pedal) G302 (at base of right "b" pillar) H11 H12 Haz sw fuse 15a Hazard Hazard sig sw out Hazard switch Head Headlamp switch Hot at all times Hot in run or start Instrument panel cluster (ipc) Interior lights K11 K12 Led Left Left front park/ turn lamp Left headlamp Left i/p junction block Left license lamp Left tail lamp Left turn indicator Normal Off Park Park lp relay Pnk Rear park lp fuse 15a Red Right Right front park/ turn lamp Right headlamp Right i/p junction block Right license lamp Right tail lamp Right turn indicator Rt i/p 1 fuse 60a S150 S176 S229 S253 S401 S900 Stop light switch Timer Turn Turn sig sw out Turn signal fuse 15a Turn signal multi- function switch Turn/ stop Underhood junction block
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Impala 2003 List of elements for Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Impala 2003: 55 3.4 l 3.4l 3.8 l 3.8l A/c compressor A12 Audio amplifier Automatic transaxle Battery Blower motor resistor assembly Brake pressure modulator valve C113 C122 Cruise control module (ccm) Digital radio receiver Drl relay Electronic brake control module (ebcm) Emergency vehicle headlamps flasher Engine oil indicator switch Engine oil level switch Fan cont 2 relay G100 (right side of engine compartment, on frame rail) G101 (left radiator support) G111 (lower left rear of engine, below ignition control module) G113 (lower left of engine, on transaxle stud) G117 (lower left of engine, on transaxle stud) G151 (lower left rear of engine, on transaxle stud) G171 (top of left frame rail, forward of left front strut tower) G202 (behind center of dash) Heated oxygen sensor (ho2s) 1 Heated oxygen sensor (ho2s) 2 Horn assembly Ignition control module (icm) Left air temperature actuator Left cooling fan Left front fog lamp Left headlamp Mass air- flow (maf) sensor Nca Powertrain control module (pcm) Radio Right air temperature actuator Right front fog lamp Right headlamp Right i/p junction block S106 (3.8l: engine harn, below left side of radiator) (3.4l: engine harn, on left side of engine compt, above transaxle) S216 (i/p harn, behind center of instrument cluster) S360 (main body harn, near right "b" pillar) Underhood junction block (bottom) Underhood junction block (top) Vehicle communication interface module W/o emergency vehicle handlamps flasher Windshield washer solvent container Windshield washer solvent level switch Windshield washer solvent pump Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Impala 2003 List of elements for Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Impala 2003: 63 (not used) Ambient air temperature sensor Ashtray lamp Auxiliary power drop connector Auxiliary power outlet Body control module (bcm) Brake fluid level indicator switch C12 C201 C420 Cigar lighter Data link connector (dlc) Driver door lock Driver door lock cylinder switch Driver door lock switch Driver information center (dic) E11 Fog lamp switch Front passenger door lock Front passenger door lock switch Fuel pump relay G201 (behind left side of dash, on left side of brake pedal bracket) G203 (behind left side of dash, on right side of brake pedal bracket) Hazard switch Headlamp dimmer switch Headlamp relay Headlamp switch Hvac control module I/p compartment lamp Ignition relay Ignition switch Impala w/trac- tion control Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Left i/p junction block Left rear door lock (impala) Left steering wheel controls (cruise) Left steering wheel controls (radio) N/a seo Nca Radio Rear compartment lid release switch Remote control door lock receiver (rcdlr) Retained accessory pwr relay Right i/p junction block Right rear door lock (impala) Right steering wheel controls (cruise) Right steering wheel controls (radio) S174 (forward lamp harn, near left headlamp) S229 (i/p harn, behind right center of instrument cluster) S236 (i/p harn, behind right side of instrument cluster) S253 (i/p harn, behind lower right side of instrument cluster) S322 (impala: main harn, behind left side of passenger compt) (monte carlo: main harn, below driver seat) Seo Seo fuse block Steering column Surveillance mode switch Traction control switch Traction control switch (impala) Underhood junction block (bottom) Underhood junction block (top) W/o console Windshield wiper system module Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Impala 2003 List of elements for Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Impala 2003: 74 (impala w/ console) ashtray lamp (impala) left courtesy reading lamp (impala) right courtesy reading lamp (monte carlo) traction control switch (w/ console) cigar lighter (w/ head- lamp flasher) auxiliary dome lamp A18 Auxiliary power outlet C (impala) (monte b C311 Carlo) Center high mounted stoplamp Driver door lock switch Driver heated seat back element Driver heated seat relay Driver heated seat switch (monte carlo) Driver heated seat thermistor Driver outside rearview mirror Driver seat Driver seat adjuster switch Driver window switch Emergency vehicle rear lamps flasher Front passenger door lock switch Front passenger heated seat back element Front passenger heated seat relay Front passenger heated seat switch (monte carlo) Front passenger heated seat thermistor Front passenger seat adjuster switch Front passenger window switch Fuel pump G301 (at base of left "b" pillar) G302 (at base of right "b" pillar) G309 (on right side of "b" pillar) Harn, right front side of roof) Impala Inflatable restraint sensing & diagnostic module (sdm) Inside rearview mirror Left backup lamp (impala) Left backup lamp (monte carlo) Left license lamp (impala) Left seat belt switch Left tail lamp assembly Left vanity mirror lamp License lamp (monte carlo) Logic Monte carlo Nca Of rear compt) Outside rearview mirror switch Passenger outside rearview mirror Passenger seat Rear compartment lid ajar switch Rear compartment lid release actuator Rear window defogger grid Right backup lamp (impala) Right backup lamp (monte carlo) Right license lamp (impala) Right tail lamp assembly Right vanity mirror lamp S330 S333 S504 (left front door harn, in door) S604 (right front door harn, in door) S900 (impala: rear deck lid harn, left side of lid) (monte carlo: rear compt lid harn, near center high mounted stoplamp connector breakout) S902 Seat belt switch Seo Sunroof module W/ gps w/o gps W/ headlamp flasher W/ heated seat W/o headlamp flasher W/o heated seat W/o seo
HEADLIGHTS Headlights Wiring Diagram, with Police Or Emergency Vehicle Option for Chevrolet Impala 2003 List of elements for Headlights Wiring Diagram, with Police Or Emergency Vehicle Option for Chevrolet Impala 2003: 56 (forward lamp harn, near left headlamp) s172 (foward lamp harn, 4 cm from outside air temp sensor breakout) s173 (on front of right strut tower) Al sens ref Al sens sig Ambient light sensor (top right of dash) B10 Body control module (behind left side of dash) Computer data lines system Drl relay Drl/ext lts fuse 15a E10 c1 E11 Emergency vehicle headlamps flasher Ext lts fuse 10a F11 F12 Fog lamp switch Fog light relay Fog lp relay Fog lp sw Fog rly fuse 10a G pnk G101 (left radiator support) G201 (behind left side of dash) G202 (behind left side of dash) G203 (behind left side of dash) Head Headlamp dimmer switch Headlamp relay Headlamp rly Headlamp sw Headlamp switch High beam High beam in Hot at all times Interior lights system Left fog lamp Left headlamp assembly Left i/p junction block Left i/p junction block (left side of dash) Low beam Nca Off On indicator Park Park brake in Park brake switch (base of parking brake assembly) Pnk Right fog lamp Right headlamp assembly S150 S236 S253 Serial data Underhood junction block (top) Headlights Wiring Diagram, without Police Or Emergency Vehicle Option for Chevrolet Impala 2003 List of elements for Headlights Wiring Diagram, without Police Or Emergency Vehicle Option for Chevrolet Impala 2003: 54 (foward lamp harn, 4 cm from outside air temp sensor breakout) s173 (on front of right strut tower) Al sens ref Al sens sig Ambient light sensor (top right of dash) B10 Body control module (behind left side of dash) Computer data lines system Drl relay Drl/ext lts fuse 15a E10 c1 E11 Ext lts fuse 10a F11 F12 Fog lamp switch Fog light relay Fog lp relay Fog lp sw Fog rly fuse 10a G pnk G101 (left radiator support) G201 (behind left side of dash) G202 (behind left side of dash) G203 (behind left side of dash) Head Headlamp dimmer switch Headlamp relay Headlamp rly Headlamp sw Headlamp switch High beam High beam in Hot at all times Interior lights system Left fog lamp Left headlamp assembly Left i/p junction block Left i/p junction block (left side of dash) Low beam Off On indicator Park Park brake in Park brake switch (base of parking brake assembly) Pnk Right fog lamp Right headlamp assembly S150 S172 S236 S253 Serial data Underhood junction block (top)
HORN Horn Wiring Diagram for Chevrolet Impala 2003 List of elements for Horn Wiring Diagram for Chevrolet Impala 2003: 19 1995 vftc c Body control module (behind left side of dash) C201 G101 (left radiator support) G201 (below left side of dash) Horn (right side of engine compt, below right headlamp) Horn brush Horn relay Horn switch Horn/rly fuse 15a Hot at all times Nca S148 S236 Slip ring Spring Steering column Top underhood junction block Top underhood junction block (right side of engine compartment, forward of strut tower)
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram for Chevrolet Impala 2003 List of elements for Instrument Cluster Wiring Diagram for Chevrolet Impala 2003: 85 (cf5: roof, sun glass, sliding electric) (clear) (or 685) (or 686) (or 686) (or tan) (or tan) -charge indicator -trunk open -change engine oil -traction active -over speed -low oil pressure -hot coolant temp -service traction system -reduce engine power -low tire pressure -intrusion on -intrusion off -door ajar -high beam out -low engine oil level -service vehicle soon -low coolant level -security -low washer fluid -low fuel -low brake fluid A/c- cruise fuse 10a Abs ind Air bag ind Ambient air temperature gauge sensor Ambient temp Battery Brake fluid level switch (in master cylinder reservoir) Brake ind Brake lvl C12 Check (malfunction indicator lamp-mil) Clstr/ bcm fuse 10a Computer data lines system Cool lvl Coolant level switch (right upper of radiator) Cruise ind Data line Dic/ rke fuse 10a Display Driver information center (dic) (in front center Engine coolant temper- ature gauge Engine oil pressure gauge Exterior lights system Fuel gauge G101 (left radiator support) G201 (behind left side of dash, on left side of brake pedal bracket) G203 (behind left side of dash, on left side of brake pedal bracket) G203 (behind left side of dash, on right side of brake pedal bracket) Gnd Ground High beam ind Hot at all times Hot in accy or run Hot in run Ignition Illumination (7 bulbs) Instrument cluster Interior lights system Internal compass sensor (w/o cf5) Left i/p junction block (end of dash in left door opening) Left turn ind Left turn input Logic Message center Mil cntl Nca Odometer/ prndl display Of roof) Pcm/bcm/ clstr fuse 10a Power tops system Powertrain control module (pcm) (in air cleaner box) Red Remote compass sensor (cf5) (integral to headline console) Reset switch Right i/p junction block Right i/p junction block (end of dash in right door opening) Right turn ind Right turn input S150 S174 S229 S236 S253 S322 Seat belt ind Serial data Service engine soon ind Speedo- meter Sunroof close Sunroof open Sunroof sw Tacho- meter Trac off ind Vf display driver Volt- meter W/ dic only Wash lvl Windshield washer fluid level switch
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram (1 of 2) for Chevrolet Impala 2003 List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Chevrolet Impala 2003: 43 (main body harn, right side of rear compt, near breakout to rear junction block) s440 A10 A11 Batt rundown protection relay Body control module (behind left side of dash) Crtsy lmp v D400 Dic/ rke fuse 10a Dome Dome lmp sw G201 (behind left side of dash, on left side of brake pedal bracket) G203 (behind left side of dash, on right side of brake pedal bracket) G302 (at base of right "b" pillar) Ground H10 Headlamp switch Hot at all times I/p brp fuse 10a I/p compartment lamp Inadvrt rly K10 Left footwell courtesy lamp Left i/p junction block Off Police & taxi Rear compartment courtesy lamp Rear compartment lid ajar indicator switch Rear compartment occupant sensor Right footwell courtesy lamp Right i/p junction block S229 S236 S253 S410 S420 S900 Surveillance mode switch (w/ taxi & police packages) Theater dim To splice s391 (diagram 2 of 2) Trk/roof brp fuse 15a Trunk system W/ trap alert system W/o trap alert system Courtesy Lamps Wiring Diagram (2 of 2) for Chevrolet Impala 2003 List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Chevrolet Impala 2003: 35 (roof harn, right front side of roof) s390 (w/ gps) (w/o gps) A1 door ajar A10 A8 door open A8 lmp cntrl Auxiliary dome lamp (police) B11 Body control module (behind left side of dash) C12 Dome lamp (w/o reading lights) Driver door lock Driver door lock switch From right i/p junction block (diagram 1 of 2) Front passenger door lock Front passenger door lock switch G203 (behind left side of dash, on right side of brake pedal bracket) G302 (at base of right "b" pillar) Inside rear view mirror Left i/p junction block Left reading lamp assembly (if equipped) Left rear side door lock (impala) Left vanity mirror lamp (if equipped) Nca Right i/p junction block Right reading lamp assembly (if equipped) Right rear side door lock (impala) Right vanity mirror lamp (if equipped) S253 S322 (body harn, approx 10 cm from inflatable restraint driver seat module breakout) S328 S391 S392 W/o lighted vanity & police Instrument Illumination Wiring Diagram (1 of 2) for Chevrolet Impala 2003 List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Chevrolet Impala 2003: 38 A2 park lamp switch input c3 B11 Body control module (behind left side of dash) Full bright G201 (behind left side of dash, on left side of brake pedal bracket) G203 (behind left side of dash, on right side of brake pedal bracket) Ground H11 H12 Headlamp switch Hot at all times I/p dimming switch Inflatable restraint steering wheel module coil Int dim ctrl K11 K12 Left cruise control switch (set/ cancel) Left i/p junction block Left radio control (seek/ preset) Low dim off Nca Off Park Park lamp relay Rear park lmp fuse 15a Red Relay ctrl Right cruise control switch (resume/ accel) Right i/p 1 fuse 60a Right i/p junction block Right radio control (volume/ mode) S236 S253 Steering column fuse 2a Steering wheel To hvac control module (diagram 2 of 2) To left i/p junction block (diagram 2 of 2) Underhood junction block (top) Instrument Illumination Wiring Diagram (2 of 2) for Chevrolet Impala 2003 List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Chevrolet Impala 2003: 52 (2 door) (4 door) (driver door harn, near outside rearview mirror connector breakout) s550 (front passenger door harn) s650 A10 Ashtray lamp Ashtray lamp (w/o front console) B10 C1 e d C10 C11 C2 c2 Dim input Driver door lock switch Driver seat heater switch Driver window switch Fog lamp switch (if equipped) From left i/p junction block (diagram 1 of 2) From left i/p junction block a (diagram 1 of 2) From left i/p junction block c (diagram 2 of 2) Front passenger door lock switch Front passenger seat heater switch Front passenger window switch G201 (behind left side of dash, on left side of brake pedal bracket) G203 (behind left side of dash, on right side of brake pedal bracket) G301 (at base of left "b" pillar) G302 (at base of right "b" pillar) Hazard & turn signal lamp flasher Hvac control module Impala Instrument cluster K c2 Left i/p junction block Monte carlo Outside rear view mirror switch Prndl lamp Radio Right i/p junction block S229 S229 (i/p harn, behind right center of instrument cluster) S236 S253 S320 S338 (console harn, front area of console) S504 S604 Surveillance mode switch To left i/p junction block (diagram 2 of 2) Traction control switch W/ front console W/ police W/o police
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 5) for Chevrolet Impala 2003 List of elements for Power Distribution Wiring Diagram (1 of 5) for Chevrolet Impala 2003: 56 (dash harness, approximately 16 cm (6 in) from circuit breaker 3) s244 Audio amplifier B10 Battery Circuit breaker 1 30a Circuit breaker 2 30a Circuit breaker 3 50a Cooling fans fuse 60a Crank relay D11 Digital radio receiver Driver outside rearview mirror Electronic brake control module (ebcm) F10 F11 From crank relay o (diagram 2 of 5) From right i/p 3 fuse (diagram 1 of 5) Fuse block- seo (w/9c1/9c3/9c6) Fusible link (10 ga-rust) Fusible link (14 ga-gray) (w/9c1,9c3, 9c6) Fusible link (16 ga-black) (w/anti-lock brakes system) G203 (under dash, to right of steering column, on dash support bracket) Generator Harness, approx 10.5 cm (4 in) from ambient air temperature sensor breakout, toward right headlamp) s174 Htd mir fuse 10a Ign rly relay Ign sw fuse 60a Junction block- left i/p Junction block- rear compartment (seo) Junction block- right i/p Junction block- underhood (bottom) Junction block- underhood (top) Left i/p fuse 60a Passenger outside rearview mirror Pnk Radio Radio antenna module Radio fuse 15a Rear defog circuit breaker 30a Rear defog relay Red Right i/p 1 fuse 60a Right i/p 2 fuse 60a Right i/p 3 fuse 60a S370 (body wiring harness, right side of floor) Seo relay Starter motor To fan cont 1 fuse (diagram 3 of 5) To ignition switch (diagram 2 of 5) To junction block- left i/p (diagram 3 of 5) To junction block- right i/p (diagram 4 of 5) To junction block- right i/p (diagram 5 of 5) To junction block- underhood (top) (diagram 5 of 5) To rear defog relay (diagram 1 of 5) To splice s177 (diagram 3 of 5) U/hood fuse 60a Power Distribution Wiring Diagram (2 of 5) for Chevrolet Impala 2003 List of elements for Power Distribution Wiring Diagram (2 of 5) for Chevrolet Impala 2003: 68 (engine harness, lower left rear side of engine compartment) s169 (not used) A/c cruise fuse 10a A/c fan fuse 20a A10 A11 A12 Abs/pcm fuse 10a Acc Accy Air temperature actuator (manual a/c) left air temperature actuator (optional) Bcm fuse 10a Body control module (bcm) C201 C373 Cig/ aux fuse 10a Crank Crank relay Cruise control module (ccm) Cruise control on/off switch Cruise control release switch Cruise fuse 2a D11 D12 Driver information center (dic) Electronic brake control module (ebcm) Evaporative emissions canister vent solenoid F10 From ign sw fuse (diagram 1 of 5) From ignition switch (diagram 2 of 5) Hvac control module Ign 0 Ign 1 Ign 3 Ignition key alarm switch (closed with key in ignition switch) Ignition switch Ignition switch) Inflatable restraint sensing & diagnostic module (sdm) Inside rearview mirror Instrument panel cluster (ipc) Junction block- left i/p Junction block- underhood (top) Off Pcm (crank) fuse 10a Pcm/bcm clstr fuse 10a Pnk Powertrain control module (pcm) Red Right air temperature actuator (optional) S234 (dash harness, behind center of dash, approximately 32.5 cm (13 in) from red Srs fuse 10a Start Stop fuse 10a Stop lamp switch To auxiliary power drop connector (diagram 5 of 5) To cruise fuse (diagram 2 of 5) To ignition relay (diagram 1 of 5) To pcm (crank) fuse (diagram 2 of 5) To pcm/bcm/ clstr fuse (diagram 2 of 5) Turn signal fuse 15a Turn signal/ hazard flasher module W/ gps W/display driver information center W/o gps Warning systems Windshield wiper system module Windshield wiper/ washer switch Wsw fuse 25a Power Distribution Wiring Diagram (3 of 5) for Chevrolet Impala 2003 List of elements for Power Distribution Wiring Diagram (3 of 5) for Chevrolet Impala 2003: 74 (3.8l-engine harness at egr valve breakout) (3.4l-engine harness, left front of engine compartment, approximately 10.5 cm (4 in) from 24 cavity black in-line connector) s157 (dash harness, behind left side of dash, approx. 4 cm (2 in) from body computer module breakout) s236 (diagram 1 of 5) (engine harn, right front of engine approx 4.7 cm (2 in) from c112) s131 (under dash, to right of steering column, on i/p support bracket) g201 1-2 shift solenoid (1-2 ss) valve 2-3 shift solenoid (2-3 ss) valve 3.4l 3.8l A/c cmpr relay A/c rly (coil) fuse 10a A12 Automatic transaxle Body control module (bcm) C1 b C1 e11 C11 C113 C12 c1 C2 b (3.4l) C311 Clstr/ bcm fuse 10a Data link connector (dlc) Dfi mdl fuse 15a Dr lk fuse 20a Driver heated seat relay Driver seat Driver window switch E1 c2 Eng devices fuse 10a Evaporative emission (evap) canister purge solenoid F11 F12 Fan cont 1 fuse 25a Fan cont 1 relay Fan cont 2 & 3 fuse 25a Fan cont 2 relay Fan cont 3 relay From cooling fans fuse (diagram 1 of 5) From ign rly relay c From left i/p fuse (diagram 1 of 5) Front passenger window switch Fuel inj fuse 15a Fuel injector Head- lamp relay Heated oxygen sensor (ho2s) sensor 1 Heated oxygen sensor (ho2s) sensor 2 If equipped Ignition control module (icm) Impala Instrument panel cluster (ipc) Junction block (underhood (bottom) Junction block- left i/p Junction block- right i/p Junction block- underhood (bottom) Lh htd st/bcm fuse 15a Mass air flow (maf) sensor Monte carlo Nca Outside rearview mirror switch Oxy sen fuse 15a P (3.8l) Pnk Pnk (3.8l: engine harness, engine near iat sensor) s109 (3.4l: engine harn, on left side of engine compt. approx (2 in) from pcm breakout) Pwr mir fuse 2a Red Red s115 Retained accsry power relay Retained accsry pwr brkr circuit breaker 30a S132 (inside underhood junction block (top)) S179 (inside underhood junction block (top)) Sunroof module (if equipped) Torque converter clutch (tcc) solenoid valve Trans sol fuse 10a Power Distribution Wiring Diagram (4 of 5) for Chevrolet Impala 2003 List of elements for Power Distribution Wiring Diagram (4 of 5) for Chevrolet Impala 2003: 82 (rear body harness, right side of rear compartment, approximately (19.5 cm) (7 in) from grommet right rear corner of rear compartment) s400 (roof harness, right side of roof approximately 12.5 cm (5 in) from dome lamp breakout, toward rear of roof) s391 A11 A12 c2 Auxiliary dome lamp B/u lp fuse 10a Backup lp relay Batt rundown protection relay Body control module (bcm) C1 d4 C2 e8 C2 f10 C311 C312 C400 Connector) s176 D10 D9 c2 Dic/rke fuse 10a Dome lamp Driver information center (dic) Driver seat Driver seat adjuster switch E3 c1 E5 c2 Emergency vehicle rear compartment lid lamps relay F1 c1 F12 F4 c1 From junction block- underhood (top) (diagram 1 of 5) Front park lp fuse 15a Front passenger heated seat relay Front passenger seat Front passenger seat adjuster switch H10 H11 H12 Headlamp switch Hvac control module I/p brp fuse 10a I/p compart- ment lamp If equipped Impala Inside rearview mirror Inside rearview mirror (optional) Junction block- right i/p K10 K11 K12 L10 Left backup lamp Left headlamp assembly Left i/p courtesy lamp Left license lamp Left reading lamp assembly (impala) Left tail lamp assembly Left vanity mirror lamp (optional) License lamp Monte carlo N10 Nca Park lp relay Pwr drop fuse 15a Pwr seats circuit breaker 30a Rear compart- ment courtesy lamp Rear compartment occupant sensor Rear prk lp fuse 15a Red Remote control door lock receiver (rcdlr) (if equipped) Rh htd st fuse 15a Right backup lamp Right headlamp assembly Right i/p courtesy lamp Right license lamp Right reading lamp assembly (impala) Right tail lamp assembly Right vanity mirror lamp (optional) To auxiliary power drop connector (diagram 5 of 5) Trk/ roof brp fuse 15a Vehicle communication interface module W/ gps W/o gps Power Distribution Wiring Diagram (5 of 5) for Chevrolet Impala 2003 List of elements for Power Distribution Wiring Diagram (5 of 5) for Chevrolet Impala 2003: 66 (diagram 1 of 5) (not used) (optional) fog lts relay A/c cmpr relay A/c rly (cmpr) fuse 10a Approximately 6.5 cm (2 in) from 8 cavity black connector below driver's seat) s320 Aux pwr fuse 20a Auxiliary power drop connector Auxiliary power outlet (w/o console) Auxiliary power output (w/ console) Blower motor resistor assembly Brk sw fuse 15a C/ltr fuse 15a C122 Cigar lighter (w/ console) Cigar lighter (w/o console) Data link connector (dlc) Drl rly relay Drl/ext lts fuse 15a E10 E11 Emergency vehicle headlights flasher Emergency vehicle rear lamps flasher Ext lts fuse 10a F/pmp rly fuse 15a F11 Fog rly fuse 10a (optional) From cig/aux fuse (diagram 2 of 5) From ignition switch breakout) s229 From pwr drop fuse (diagram 4 of 5) From right i/p 2 fuse h From s178 (diagram 5 of 5) From u/hood 1 fuse (diagram 1 of 5) Fuel pump relay G201 (under dash, to right of steering column, on i/p support bracket) G301 (below driver door opening, rear of left "a" pillar) Generator Haz sw fuse 15a Horn rly fuse 15a Horns relay Hvac blo fuse 25a Junction block- right i/p Junction block- underhood (bottom) Junction block- underhood (top) Left headlamp assembly Left- spot lamp (optional) Nca Pcm fuse 15a Powertrain control module (pcm) Red Right headlamp assembly Right i/p junction block Right- spot lamp (optional) S178 (inside underhood junction block (top)) red Splice pack- sp205 Spot lamp-l fuse 15a Spot lamp-r fuse 15a Stop lamp switch To horn relay fuse (diagram 5 of 5) Turn signal/ hazard flasher module Vehicle interface unit (viu) (in rear compartment, mounted to rear of left rear wheel wheelhouse) W/ headlamp flashers W/ 9c1/9c3/ 9c8 W/9c1/9c3 W/o 9c1/9c3/ 9c8 W/o headlamp flashers
POWER DOOR LOCKS Power Door Locks Wiring Diagram for Chevrolet Impala 2003 List of elements for Power Door Locks Wiring Diagram for Chevrolet Impala 2003: 58 (impala) (under dash, to right of steering column) g201 A10 A11 A12 Acc sig in Ajar B11 B12 Battery Bcm fuse 10a Body control module (behind left side of dash) Closed Clstr/bcm fuse 10a Ctsy D12 Dic/rke fuse 10a Door ajar in Door lock Down Dr lk fuse 20a Dr lk/unlk Driver door lock cylinder switch Driver door lock switch Front passenger door lock switch G203 (under dash, to right of steering column) Ground Hot at all times Hot in on or acc Hot in on or start Ignition 0 Ignition 1 Illum entry Interior lights system Left i/p junction block Lf dr lk/unlk Lf dr open in Lh htd seat/bcm fuse 15a Lk/unlk in Lock Ohms Open Pcm/bcm/ clstr fuse 10a Pnk Power distrib- ution system Power distribution system Remote control door lock receiver (upper center of dash) Right i/p junction block S236 S253 S322 Serial data sig Stop fuse 10a Tan Trunk rel ctrl Trunk/tailgate/ fuel doors system Un- lock Unlock
POWER MIRRORS Electrochromic Mirror Wiring Diagram for Chevrolet Impala 2003 List of elements for Electrochromic Mirror Wiring Diagram for Chevrolet Impala 2003: 27 (at base of right "b" pillar) g302 A/c cruise fuse 10a B/u lamp fuse 10a B6 c1 Back-up lamps relay Body control module (bcm) (behind left side of dash) C9 c2 D10 Dic/rke fuse 10a E3 c1 Electrochromatic Exterior lights system Hot at all times Hot in run Ign Inside rearview mirror Interior lights system L10 Left i/p junction block (left side of dash, behind access panel) Left mirror switch N10 Rev Right i/p junction block (right side of dash behind access panel) Right mirror switch S392 W/ gps W/o gps Power Mirror Wiring Diagram for Chevrolet Impala 2003 List of elements for Power Mirror Wiring Diagram for Chevrolet Impala 2003: 17 Defogger system (heated mirror) Driver outside rearview mirror G301 (left "b" pillar) Horz Hot at all times Interior lights system Left Left i/p junction block (left side of dash, behind access panel) Nca Off Outside rearview mirror switch Passenger outside rearview mirror Pwr mir fuse 2a Right Right/ left select switch S504 Vert
POWER SEATS 6-Way Power Seat Wiring Diagram for Chevrolet Impala 2003 List of elements for 6-Way Power Seat Wiring Diagram for Chevrolet Impala 2003: 25 Back C2 f8 Driver seat adjuster motor assembly Driver seat adjuster switch Driver seat front vertical motor Driver seat horizontal motor Forward Front down Front passenger seat adjuster motor assembly Front passenger seat adjuster switch Front passenger seat front vertical motor Front passenger seat horizontal motor Front passenger seat rear vertical motor Front up G301 (rear of left "a" pillar) G302 (rear of right "a" pillar) Hot at all times Nca Power seats circuit breaker 30a Rear down Rear up Right i/p junction block S320 S328 Tan Heated Seats Wiring Diagram for Chevrolet Impala 2003 List of elements for Heated Seats Wiring Diagram for Chevrolet Impala 2003: 32 A12 Body control module (behind left side of dash) D11 Driver heated seat back element Driver heated seat cushion element Driver heated seat relay Driver heated seat switch Driver heated seat thermistor Driver seat back Driver seat cushion Front passenger heated seat back element Front passenger heated seat dushion element Front passenger heated seat relay Front passenger heated seat switch Front passenger heated seat thermistor Front passenger seat back Front passenger seat cushion G301 (rear of left "a" pillar) G302 (rear of right "a" pillar) Ground Hot at all times Left i/p junction block Lh htd st/ bcm fuse 15a Lo/hi input Nca On input Pnk Rh htd seat fuse 15a Right i/p junction block S330 S333 Sensor input
POWER TOP/SUNROOF Power Top/Sunroof Wiring Diagram, with DIC for Chevrolet Impala 2003 List of elements for Power Top/Sunroof Wiring Diagram, with DIC for Chevrolet Impala 2003: 20 Close Close sig Driver information center (dic) (front center of roof) G302 (base of right "b" pillar) Ground Hot in accy, on & rap Left i/p junction block (left side of dash behind access panel) Nca Open Open sig Red Retained accessory power circuit breaker 30a S328 Soft stop Stop input Sun roof control module (in roof) Sunroof motor (center left of windshield) Sunroof opening postion switch (above sunroof motor) Vent Vent input Power Top/Sunroof Wiring Diagram, without DIC for Chevrolet Impala 2003 List of elements for Power Top/Sunroof Wiring Diagram, without DIC for Chevrolet Impala 2003: 20 Close Close sig G302 (base of right "b" pillar) Ground Hot in accy, on & rap Left i/p junction block (left side of dash behind access panel) Nca Open Open sig Red Retained accessory power circuit breaker 30a S328 Soft stop Stop input Sun roof switch (front center of roof) Sunroof module (in roof near windshield) Sunroof motor (center left of windshield) Sunroof opening position switch (above sunroof motor) Vent Vent input
POWER WINDOWS Power Windows Wiring Diagram for Chevrolet Impala 2003 List of elements for Power Windows Wiring Diagram for Chevrolet Impala 2003: 31 A6 c2 B6 c2 C1 a4 C2 a9 Down Driver Driver window motor Driver window switch Express down Express down module Front passenger window motor Front passenger window switch G301 (at base of left "b" pillar) G302 (at base of right "b" pillar) Hot w/retained accsry pwr relay energized Illumination lamp Interior lights system Left i/p junction block (left side of dash, behind access panel) Left rear Left rear window motor Left rear window switch Passenger front Retained accsry pwr circuit breaker 30a Right i/p junction block (right side of dash, behind access panel) Right rear Right rear window motor Right rear window switch S504 S604 Tan Window lock out switch
RADIO Radio Wiring Diagram, with Amplifier (1 of 2) for Chevrolet Impala 2003 List of elements for Radio Wiring Diagram, with Amplifier (1 of 2) for Chevrolet Impala 2003: 71 (on right side of "b" pillar) g309 A10 A11 A12 A5 c1 A8 c2 Ant Ant enable Antenna enable sig Aud out- Aud signal Audio amplifier (in luggage compt, beneath center of rear package shelf) B10 B11 B12 Batt C11 C12 C2 e2 Common Computer data lines system Data Defog grid/ am ant F10 F11 c1 G202 (behind left side of dash, left side of brake pedal bracket) G206 (behind center of dash) Ground Hot at all times Illum Interior lights system Left aux Left i/p junct block Left i/p junction block (left side of dash) Lf spkr Lf spkr out+ Lf spkr out- Lf twet spkr out+ Lf twet spkr out- Lr spkr Lr spkr out+ Lr spkr out- Nca Pnk Radio Radio antenna module Radio fuse 15a Rear defog circuit breaker 30a Rear window Red Remote Remote out Rf spkr Rf spkr out+ Rf spkr out- Rf twet spkr out+ Rf twet spkr out- Right aux Right i/p accessory wiring junction block Right i/p junct block c2 Right i/p junction block Right i/p junction block (end of dash, in right door opening) Rr spkr Rr spkr out+ Rr spkr out- S229 S360 S370 Satelite radio circuit Tan Vehicle communication interface module (in rear compartment) Radio Wiring Diagram, with Amplifier (2 of 2) for Chevrolet Impala 2003 List of elements for Radio Wiring Diagram, with Amplifier (2 of 2) for Chevrolet Impala 2003: 15 1.18k 2.37k 6.96k Inflatable restraint steering wheel module coil Left front door speaker Left radio control switches Left rear speaker Nca Pnk Red Right front door speaker Right radio control switches Right rear speaker Steering wheel controls Tan Radio Wiring Diagram, with Police Option for Chevrolet Impala 2003 List of elements for Radio Wiring Diagram, with Police Option for Chevrolet Impala 2003: 64 (end of dash, in left door opening) left i/p junction block (on right side of "b" pillar) g309 1.18k 2.37k 6.96k A10 A11 A12 A5 c1 A8 c2 Ant Ant enable Aud out- Aud signal B10 B11 B12 Batt C11 C12 C2 e2 Common Computer data lines system Data Defog grid/ am ant F10 F11 c1 G202 (behind center of dash) G202 (behind left side of dash, left side of brake pedal bracket) Ground Hot at all times Illum Inflatable restraint steering wheel module coil Interior lights system Left aux Left front door speaker Left radio control switches Left rear speaker Lf spkr Lr spkr Nca Not used Pnk Radio Radio antenna module Radio fuse 15a Rear defog circuit breaker 30a Rear window Remote Remote out Rf spkr Right aux Right front door speaker Right i/p accessory wiring junction block Right i/p junction block Right i/p junction block (end of dash, in right door opening) Right radio control switches Right rear speaker Rr spkr S229 Satelite radio circuit Steering wheel controls Tan Vehicle communication interface module Radio Wiring Diagram, without Amplifier for Chevrolet Impala 2003 List of elements for Radio Wiring Diagram, without Amplifier for Chevrolet Impala 2003: 64 (end of dash, in left door opening) left i/p junction block (on right side of "b" pillar) g313 A10 A11 A12 A5 c1 A8 c3 Ant enable B10 B11 B12 Batt C11 C12 Common Computer data lines system Data Defog grid/ am ant Defogger system F10 F11 c1 Fm ant G202 (behind left side of dash, left side of brake pedal bracket) G206 (behind center of dash) Ground Hot at all times Illum Inflatable restraint steering wheel module coil Interior lights system Left aux Left front door speaker Left front tweeter (uplevel) Left radio control switches Left rear speaker Lf spkr Lr spkr Mode Mute Nca Pnk Preset Radio Radio antenna module Radio fuse 15a Rear window Remote Remote out Rf spkr Right aux Right front door speaker Right front tweeter (uplevel) Right i/p accessory wiring junction block Right i/p junction block (end of dash, in right door opening) Right radio control switches Right rear speaker Rr spkr S229 Satelite radio circuit Seek dn Seek type Seek up Tan Vol dn Vol up Satellite Radio Wiring Diagram, Early Production for Chevrolet Impala 2003 List of elements for Satellite Radio Wiring Diagram, Early Production for Chevrolet Impala 2003: 28 A12 Antenna Aud out - Aud- Bare C1 a7 C2 a6 Coax ant in (sat) Coax ant in (terr) Computer data lines system Digital radio Digital radio receiver Drain wire F11 c1 F2 c3 G202 (under dash, in center) Ground Hot at all times Lf aud + Lt sig Radio Radio fuse 15a Right i/p junction block (behind right side of dash) Rt aud + Rt sig S360 S370 Serial data Satellite Radio Wiring Diagram, Late Production for Chevrolet Impala 2003 List of elements for Satellite Radio Wiring Diagram, Late Production for Chevrolet Impala 2003: 28 A12 Antenna Aud out - Aud sig- Bare C1 a7 C2 a6 Coax ant in (sat) Coax ant in (terr) Computer data lines system Digital radio Digital radio receiver Drain wire F11 c1 F2 c3 G202 (under dash, in center) Ground Hot at all times Lf aud + Lt sig Radio Radio fuse 15a Right i/p junction block (behind right side of dash) Rt aud + Rt sig S360 S370 Serial data
SHIFT INTERLOCK Shift Interlock Wiring Diagram for Chevrolet Impala 2003 List of elements for Shift Interlock Wiring Diagram for Chevrolet Impala 2003: 21 1995 vftc c A/t shift lock control solenoid (in center console) A/t shift lock control solenoid (in steering column) Automatic transaxle Bcm class 2 serial data Body control module (behind left side of dash) C113 D10 G113 (on transaxle stud) Hot in on and start Left i/p junction block (left side of dash) Pnk Powertrain control module (in air cleaner box) S106 Splice pack sp205 (left side of dash) Stop fuse 10a Stoplamp switch (on brake pedal bracket) Tan/ Transmission internal mode switch W/center console W/o center console
STARTING/CHARGING Charging Wiring Diagram for Chevrolet Impala 2003 List of elements for Charging Wiring Diagram for Chevrolet Impala 2003: 22 (not used) A/c rly (cmpr) fuse 10a Battery Charge warning indicator (red) Class 2 serial data Class 2 serial data c1 Computer data lines Fusible link (10 ga- rust) G113 (on transaxle stud, near starter) Generator Generator turn on signal c2 Hot at all times Hot in acc, on or start Instrument panel cluster Left i/p junction block (left side of dash, behind access panel) Pcm/bcm/clstr fuse 10a Power distribution system Powertrain control module (pcm) (in air cleaner box) Red Splice pack sp205 (next to left i/p accessory wiring junction block wiring harness, taped on harness) Starter solenoid Underhood junction block (top) (on front of right strut tower) Starting Wiring Diagram for Chevrolet Impala 2003 List of elements for Starting Wiring Diagram for Chevrolet Impala 2003: 31 Abs/pcm fuse 10a Acc B10 Batt Battery C10 Class 2 serial data Crank relay Crank relay ctrl Crank request Data link connector (dlc) (partial) (below left side of dash, right of steering column) Fusible link (10-ga rust) G113 (on transaxle stud, near starter) Generator Hold- in coil Hot at all times Hot in on or start Ignition switch Left i/p junction block (left side of dash, behind access panel) Off Pcm (crank) fuse 10a Pnk Power distribution system Powertrain control module (in air cleaner box) Pull- in coil Red Splice pack sp205 (next to left i/p accessory wiring junction block, taped on harness) Start Starter motor Starter solenoid Underhood junction block (top) (on front of right strut tower)
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram for Chevrolet Impala 2003 List of elements for Supplemental Restraints Wiring Diagram for Chevrolet Impala 2003: 49 (below driver door opening, rear of left "a" pillar) g301 A10 A11 A12 A13 A14 A15 A16 A17 A18 Air bag indicator C1 a1 C217 a1 Class 2 serial data Data link connector (dlc) (partial) (below left side of dash, right of steering column) F10 G301 (below driver door opening, rear of left "a" pillar) Ground High control Hot in on & start I/p panel fuse block (left side of dash, behind access panel) If equipped Ignition Inflatable restraint front end discriminating sensor Inflatable restraint i/p module Inflatable restraint sensing & diagnostic module (below passenger's seat) Inflatable restraint steering wheel module Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Left front inflatable restraint side impact module Left i/p junction block (left side of dash, behind access panel) Left inflatable restraint side impact sensor (impala: on left "b" pillar) (monte carlo: in driver's door) Left seat belt switch Left signal Logic Low control Nca Pnk Right i/p junction block (right side of dash, behind access panel) Sensor signal Shorting bar Signal Solid state Splice pack sp205 (in i/p harness, to right of park brake lever, taped over completely, between two strips of white tape) Srs fuse 10a Stage 1 Stage 2 Tan Voltage
TRANSMISSION A/T Wiring Diagram for Chevrolet Impala 2003 List of elements for A/T Wiring Diagram for Chevrolet Impala 2003: 61 (3.4l) (3.8l) (below dash, right side of steering column) data link connector (engine harn, below intake plenum) s121 1-2 shift sol 2-3 shift sol 3.8l 3.4l 5v reference a A/t iss sensor hi A/t iss sensor lo Abs/ pcm fuse 10a Automatic transaxle (4t65-e) Automatic transaxle fluid pressure manual valve position switch Automatic transaxle fluid temperature sensor Automatic transaxle input shaft speed sensor Battery in Brake switch in Ect sensor in Engine coolant temperature sensor (left rear of engine, near coolant outlet) G113 (lower left of engine, on transaxle stud) Hot at all times Hot in on or start Ignition in Instrument panel cluter Left i/p junction block (left) (left side of dash) Malfunction indicator lamp Map sensor Mil ctrl Park/neutral position (pnp) switch Pc sol hi Pc sol lo Pcm fuse 15a Pcm ground Pcm/bcm/ cluster fuse 10a Pnk Powertrain control module (in air cleaner box) Pressure control sol Red S106 Sensor ground Sensor return Serial data Splice pack sp205 (taped to harness, left end of dash) Stop lamp switch Tan Tcc pwm sol Tcc release Tcc release in Tcc/ brake switch Tft sensor in Throttle position sensor (on throttle body assembly) Tps in Tr sw in-a Tr sw in-b Tr sw in-c Tr sw in-p Trans sol fuse 10a Underhood junction block (front of right strut tower) Vehicle speed sensor (lower right rear of engine compt, end of transaxle) Vss hi (signal) Vss lo (ground)
TRUNK, TAILGATE, FUEL DOOR Trunk, Tailgate, Fuel Door Wiring Diagram for Chevrolet Impala 2003 List of elements for Trunk, Tailgate, Fuel Door Wiring Diagram for Chevrolet Impala 2003: 26 A11 Batt Body control module (behind left side of dash) Class 2 ser data Computer data lines system D12 Dic/rke fuse 10a G203 (behind left side of dash, on right side of brake pedal bracket) G302 (at base of right "b" pillar) Gnd Hot at all times Input Instrument panel cluster Output Rear compartment lid ajar switch Rear compartment lid release actuator (on center of luggage compartment lid) Rear compartment lid release switch Remote control door lock receiver (on upper center of dash) Rfa link Right i/p junction block Right i/p junction block (end of dash, in right door opening) S253 S440 (in main body wiring harness) S900 Trunk ajar sw Trunk open ind
WARNING SYSTEMS Warning Systems Wiring Diagram for Chevrolet Impala 2003 List of elements for Warning Systems Wiring Diagram for Chevrolet Impala 2003: 63 (under dash to right of steering column) g203 (under dash, to right of steering column) g201 A10 A12 A15 Accessory voltage Ajar Battery Bcm fuse 10a Body control module (bcm) (behind left side of dash, above parking brake lever) Class 2 serial data Closed Clstr/ bcm fuse 10a Data link connector (dlc) (partial) (below left side of dash, right of steering column) Door open switch- driver Dr lk fuse 20a Driver door lock Driver door lock switch Driver door open sw sig Exterior lights system G203 (under dash, to right of steering column) G301 (below driver door opening, rear of left "a" pillar) Gnd Ground Head Headlamp switch Headlamp switch signal Hot at all times Hot in accy & on Hot in accy, on & start Hot in on & start Ignition 0 voltage Ignition 1 voltage Ignition key alarm switch (closed w/key in ignition switch) Ignition switch Inflatable restraint sensing & diagnostic module (sdm) (below passenger's seat) Instrument panel cluster (ipc) Key in ignition switch sig Left i/p junction block (left side of dash, behind access panel) Left seat belt switch Left turn signal indicator Left turn signal lamps voltage Lh htd st/bcm fuse 15a Logic Nca Off Open Park Park brake switch (at base of parking brake assembly) Park lamp switch Park lamp switch signal Pcm/bcm clstr fuse 10a Pnk Power distribution system Radio Right turn signal indicator Right turn signal lamps voltage S236 (i/p wiring harness, behind left side of dash, 4 cm from bcm breakout) S253 (i/p wiring harness, behind lower left side of dash, 24 cm from sp205 breakout) S322 (main body wiring harness, left side of passenger compartment, 10 cm from c311 breakout) Splice pack sp205 (in i/p harness, to right of park brake lever) Stop fuse 10a Tan
WIPER/WASHER Wiper/Washer Wiring Diagram for Chevrolet Impala 2003 List of elements for Wiper/Washer Wiring Diagram for Chevrolet Impala 2003: 26 (behind left side of dash, on left side of brake pedal bracket) g201 (left radiator support) g101 1,000 ohms 10,000 ohms 2,000 ohms 24,000 ohms Hot in accy & on Ign Instrument panel cluster Left i/p junction block (end of dash in left door opening) Message center Mist Nca Off Ohms Park switch Pulse timer circuitry Red S150 Washer switch Windshield washer fluid level switch Windshield washer fluid pump Windshield wiper motor (on left side of firewall, in engine compartment) Windshield wiper/washer switch Wiper switch Wsw fuse 25a
