Diagram sections — 27 (45 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY CONTROL MODULES COMPUTER DATA LINES 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 WINDOWS RADIO SHIFT INTERLOCK STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION TRUNK, TAILGATE, FUEL DOOR WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Compressor Wiring Diagram for Chevrolet Astro 2003 List of elements for Compressor Wiring Diagram for Chevrolet Astro 2003: 31 A/c comp fuse 10a A/c comp relay A/c compressor clutch A/c compressor clutch diode (in underhood fuse block) A/c enable relay A/c high pressure switch (rear of a/c comp) A/c low press A/c low pressure switch (on a/c accumulator) A/c request Bi-lv Blend Def G104 (lower left side of evaporative housing) Heat Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (behind left side of dash) Ign-e fuse 10a Max Norm Off Pnk Powertrain control module (below underhood fuseblock, on left side of firewall) S111 (engine harn, 17 cm from underhood fuse block breakout) S124 (engine harn, 11.3 cm from oil pressure switch breakout) S224 (i/p harn. 17 cm from body control module breakout) Underhood fuse block (left side of firewall) Vent Heater Wiring Diagram for Chevrolet Astro 2003 List of elements for Heater Wiring Diagram for Chevrolet Astro 2003: 39 (forward lamp harn, 8 cm from right headlamp breakout) (not used) 17 cm from underhood fuse block breakout) 1995 vftc c A/c relay Air temperature actuator (behind right side of dash, left side of air duct) Auxiliary heater blower motor Auxiliary heater blower motor resistor (left side of vehicle, behind "b" pillar) Auxiliary heater blower motor switch B red Bi-lv Blend Blower motor resistor assembly (behind coolant recovery reservoir, on right front fender) Convenience center (behind left kick panel) Coolant bypass valve solenoid (behind receiver/ drier) Def Front blower motor Frt hvac fuse 30a Fuse block breakout) G100 (right radiator support) G104 (lower left side of evaporative housing) G200 (right front "a" pillar) G301 (above the rear heater, towards rear of vehicle) Heat Hot at all times Hot in run Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (behind left side of dash) Interior lights system Med Off Rr htr a/c fuse 30a S100 S224 (i/p harn. 17 cm from body control module breakout) S229 (i/p harn, 4 cm from air temp actuator breakout) Tan Underhood fuse block (left side of firewall) Vent Manual A/C Wiring Diagram for Chevrolet Astro 2003 List of elements for Manual A/C Wiring Diagram for Chevrolet Astro 2003: 58 11.3 cm from oil pressure switch breakout) 17 cm from underhood fuse block) 1995 vftc c A/c comp fuse 10a A/c comp relay A/c compressor clutch A/c compressor clutch diode (in underhood fuse block) A/c enable relay A/c high pressure switch (rear of a/c compt) A/c low press A/c low pressure switch (on a/c accumulator) A/c relay A/c request Air temperature actuator (behind right side of dash, left side of air duct) Auxiliary a/c blower motor Auxiliary a/c blower motor resistor (left rear of vehicle, near "d" pillar) Auxiliary a/c blower motor switch Auxiliary heater blower motor Auxiliary heater blower motor resistor (left side of vehicle, below "b" pillar) Auxiliary heater blower motor switch B red Bi-lv Blend Blower motor resistor assembly (behind coolant recovery reservoir, on right front fender) C10 Convenience center (behind left kick panel) Coolant bypass valve solenoid (behind receiver/ drier) Def Front blower motor Frt hvac fuse 30a G100 (right radiator support) G104 (lower left side of evap housing) G200 (right front "a" pillar) G301 (above the rear heater, towards rear of vehicle) G404 (below left rear seat- belt retractor) Heat Hot at all times Hot in run Hot in run or start Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (behind left side of dash) Ign-e fuse 10a Interior lights system Max Med Norm Off Pnk Powertrain control module (below underhood fuse block, on left side of firewall) Rr htr a/c fuse 30a S100 (forward lamp harn, 8 cm from right headlamp breakout) S111 (engine harn, 17 cm from underhood fuse block breakout) S224 (i/p harn. 17 cm from body control module breakout) S229 (i/p harn, 4 cm from air temp actuator breakout) Tan Underhood fuse block (left side of firewall) Vent
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram for Chevrolet Astro 2003 List of elements for Anti-lock Brakes Wiring Diagram for Chevrolet Astro 2003: 41 (under left side of dash) data link connector (dlc) Abs fuse 60a Abs ind Brake fluid lvl sw Brake fuse 18 10a Brake ind Brake pressure differential switch (on brake pressure modulator valve assembly) Brake sw output Computer data lines system Cruise control system Electronic brake control module (ebcm) (on left front side of frame left of transmission) Fuse block breakout) Fuse output G101 (on left front radiator support, below main body ground) G106 (left rear of eng, next to knock sensor) Ground Hot at all times Hot in run I/p fuse block (behind left side of dash) Instrument panel cluster Left front wheel speed sensor Lf whl spd sens ret Lf whl spd sens sig Nca Power distribution system Powertrain control module (pcm) (below underhood fuse block, on left side of firewall) Radio batt fuse 19 10a Red Rf whl spd sens ret Rf whl spd sens sig Right front wheel speed sensor S110 S127 Serial data Splice pack sp261 (strapped to i/p harn, behind data link connector) Stop lamp switch (above brake pedal) Tan Tcc brake sw/ cruise ctrl release sig Underhood fuse block (on left side of firewall) Vehicle speed out Vss
ANTI-THEFT Anti-theft Wiring Diagram for Chevrolet Astro 2003 List of elements for Anti-theft Wiring Diagram for Chevrolet Astro 2003: 29 12v ref A12 Body control module (above radio) C201 Class 2 serial data c1 G107 (left rear of engine, next to knock sensor) Gauges fuse 4 10a Ground Hot at all times Hot in run or start I/p fuse block (behind left side of dash) Ignition Instrument panel cluster Low ref Passlock sensor (in steering column, near lock cylinder) Passlock sig Pnk Power distribution system Powertrain control module (below underhood fuse block, on left side of firewall) Radio batt fuse 19 10a S213 S225 S330 Security hall effect sensor Security indicator Serial data Splice pack sp261 (i/p harn, behind data link connector) Tamper hall effect sensor Tbc fuse 15 10a
BODY CONTROL MODULES Body Control Modules Wiring Diagram for Chevrolet Astro 2003 List of elements for Body Control Modules Wiring Diagram for Chevrolet Astro 2003: 86 12v ref 5v ref A10 A11 A12 Acc Ambient light sensor (on top left center of dash) Ambient light sensor sig Anti-theft system B10 B11 B12 B7 right turn signal lmp sup volt Battery positive voltage Body control module (bcm) (above radio) C201 Class 2 serial data Class 2 serial data sig Computer data lines system Courtesy lamp low ctrl Courtesy lamp on sig Courtesy lamp relay ctrl Cruise fuse 6 10a Door lock ctrl Door locks system Door unlock ctrl Driver door jamb switch sig Driver door unlock relay ctrl Drl relay ctrl Exterior lights system G107 (on left rear of eng, next to knock sensor) G110 (next to battery) Gmcm serial data Ground Guages fuse 4 10a Headlamp off sig Headlamp relay coil sup volt Headlamp sw flash-to-pass Headlights system High beam sig Horn relay ctrl Horns system Hot at all times Hot in run Hot in run or start I/p fuse block I/p lamp sullpy voltage Ignition 1 voltage Ignition 3 voltage Ignition switch Instrument cluster system Interior lamp defeat sw sig Interior lights system Key in ignition switch sig Led dimming signal Left turn signal lmp sup volt Lift gate courtesy lamp ctrl Lock Low ref Off Park brake switch (on parking brake assembly) Park brake switch sig Park lamp relay ctrl Pass door jamb switch sig Pnk Power distribution system (rap) Rap relay coil ctrl Remote keyless entry circuit Run S201 S206 S213 S225 S251 (in i/p harn, 22 cm from c201) S330 Seat belt switch sig Security system sensor sig Side door jamb sw sig Start Tbc fuse 15 10a Tow/haul switch sig Transmission system Trunk release relay ctrl Trunk, tailgate, fuel doors system Vehicle speed sensor sig Warning sytems
COMPUTER DATA LINES Computer Data Lines Wiring Diagram for Chevrolet Astro 2003 List of elements for Computer Data Lines Wiring Diagram for Chevrolet Astro 2003: 21 A12 Aux power fuse 7 25a Body control module (above radio) Convenience center (left of i/p fuse block) Data clss 2 Data link connector (dlc) (under left side of dash) Driver information center Electronic brake control module (ebcm) (on left front side of frame, left of transmission) G105 (on thermostat housing) G110 (next to battery) Hot at all times I/p fuse block (behind left side of dash) Inflatable restraint sensing & diagnostic module (under driver's seat) Instrument panel cluster Powertrain control module (below underhood fuse block, on left side of firewall) S117 S204 S206 S210 Splice pack sp261 (strapped on dash harn, behind data link connector) Transfer case shift control module (behind left kick panel)
CRUISE CONTROL Cruise Control Wiring Diagram for Chevrolet Astro 2003 List of elements for Cruise Control Wiring Diagram for Chevrolet Astro 2003: 42 (shown brakes off) A12 A13 A14 A15 Antilock brake system Brake fuse 18 10a C201 Cruise control module (center front of firewall) Cruise engaged Cruise fuse 6 10a Cruise on/off input Exterior lights system G105 (front of engine in thermostat housing) Ground Hot at all times Hot in run I/p fuse block (behind left side of dash) Ignition Instrument cluster system Multifunction turn signal lever Nca Off Powertrain control module (pcm) (left side of engine compt) R/a Resume/accel input S/c S117 S130 (front of dash, 32 cm from forward lamp harness breakout) S200 (i/p harness, 16 cm from i/p fuse block breakout) S201 S204 S221 Set/coast input Stop/haz fuse 1 20a Stoplamp sw input Stoplamp switch (above brake pedal) Tcc brake sw input Vehicle speed sensor (vss) (rear of transmission) Vss high Vss low Vss signal
DEFOGGERS Defoggers Wiring Diagram for Chevrolet Astro 2003 List of elements for Defoggers Wiring Diagram for Chevrolet Astro 2003: 20 (right front "a" pillar, above right door jamb switch) g200 (upper half of right "d" pillar) g403 C1 c Defogger on indicator Hot at all times Hot in run Htd mir/ rr-defog fuse 40a Htr-a/c fuse 12 20a Hvac control assembly I/p fuse block (behind left side of dash) Rear defogger switch Rear defogger timer relay Rear window defogger grid Red Rr defog fuse 5 30a S224 S229 S407 Timer Underhood fuse block (on left side of firewall)
ENGINE PERFORMANCE
4.3L VIN X 4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Astro 2003 List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Astro 2003: 66 (under left side of dash) data link connector 3-2 ss Battery Body control module (above radio) Brake sw Central sequential fuel injection Ckp +12v Ckp low ref Ckp sig Cls 2 data Cmp low ref Cmp sig Crankshaft position sensor (behind and to the right of pulley) Ecm-b fuse 20a Ecm-i fuse 20a Ect +5v Ect low ref Engine coolant temperature sensor (on left side of left cylinder head) Ftp sens +5v G105 (on thermostat housing) G106 (left rear of engine) Ground Ho2s 1,1 hi Ho2s 1,1 lo Ho2s 1,2 hi Ho2s 1,2 lo Ho2s 2,1 hi Ho2s 2,1 lo Hot at all times Hot in run & start I/p fuse block Ignition Injector 1 Injector 2 Injector 3 Injector 4 Injector 5 Injector 6 Knock sensor (left rear of distributor) Ks return Ks sig Map +5v Map low ref Nca Pnk Powertrain control module (on left side of firewall) Prnd a Prnd b Prnd p Range b Range c Red S109 S115 S116 S123 S127 S155 Sens low ref Sp261 (behind data link connector) Tan Tft low ref Tps +5v Tps low ref Trans fuse 20 10a Underhood fuse block 4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Astro 2003 List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Astro 2003: 24 (body harn, 6 cm from courtesy/ reading lamp) (in fuel tank) fuel pump & sender assembly (in fuel tank) fuel tank pressure sensor (not used) Camshaft position sensor (on side of distributor) Eng-1 fuse 20a Fuel pump relay G104 (center of dash) G105 (in thermostat housing) G302 (on the left rear side of frame Heated oxygen sensor (bank 1 sensor 1) (left front exhaust y-pipe) Heated oxygen sensor (bank 1 sensor 2) (on exhaust, between muffler & converter) Heated oxygen sensor (bank 2 sensor 1) (right front exhaust y-pipe) Hot in run & start Nca Park/ neutral position switch (left center of trans) Pnk Red S117 S119 S308 Tan Throttle position sensor (left side of throttle body) Underhood fuse block 4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Astro 2003 List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Astro 2003: 26 1-2 sol 2-3 sol 3-2 sol A/t fluid pressure manual valve position switch Anti-lock brakes system Automatic transaxle Brake fuse 18 10a Evaporative canister purge solenoid (top of engine, near map sensor) Evaporative canister vent valve (underside of vehicle, at fuel filter) G105 (in thermostat housing) Hot in run I/p fuse block Manifold absolute pressure sensor (top of engine, near ign coil) Mass airflow sensor (front of air intake duct) Pc sol valve Pnk Pnk a Red Rev S112 (engine harn 15 cm from fuse block breakout) S117 Stop- light switch (above brake pedal) Tan Tcc pmw sol Tcc sol Tft sensor 4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Astro 2003 List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Astro 2003: 71 (in thermostat housing) g105 1-2 ss 2-3 ss A/c clu A/c req A/c system Abs system (speed signal) Air intake duct) Cmp +12v Coil driver Coil wire Cruise control system Cruise control system (speed signal) Cruise eng Cyc sw in Distributor Evap purge Evap vent Ftp sens sig Fuel lev Fuel pmp G106 (left rear of engine) G107 (left rear of engine) Gen f duty sig Gen l Gnd Ground Ho2s 1,1 htr Ho2s 1,2 htr Ho2s 2,1 htr Hot at all times I/p fuse block Iac coil a hi Iac coil a lo Iac coil b hi Iac coil b lo Iat low ref Iat sig Ic timing ctrl Idle air control valve (left rear of throttle body) Ign Ignition coil Ignition control module (top of engine) front of coil) Instrument panel cluster Intake air temperature sensor (top of Logic Maf sens sig Malfunction indicator lamp Map sig Mil ctrl Pc sol hi Pc sol lo Pnk Powertrain control module (left side of firewall) Prnd c Radio batt fuse 19 10a Red S127 S155 Starting/charging system Tan Tcc pwm Tcc sol Tft sens sig Timing Tp sig Trans rng a Vehicle speed sensor (rear of transmission) Vss high Vss low Vss out
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Chevrolet Astro 2003 List of elements for Back-up Lamps Wiring Diagram for Chevrolet Astro 2003: 12 (body harn, near g400 breakout) s321 G400 (upper half of left "d" pillar) G401 (upper half of right "d" pillar) Hot in run or start I/p fuse block Left back-up lamp Park/neutral position switch (left center of transmission) Pnk Right back-up lamp S319 S403 Turn b/u fuse 16 20a Exterior Lamps Wiring Diagram for Chevrolet Astro 2003 List of elements for Exterior Lamps Wiring Diagram for Chevrolet Astro 2003: 78 (body harn, near right rear door breakout) s401 (i/p harn, near instrument cluster conn breakout) A11 Auto Back-up lamps circuit Body control module (above radio) C201 Center high mounted stop lamp (chmsl) Chmsl resistor (on left kick panel) Convenience center (near left kick panel) Cruise control system G100 (right front radiator support) G101 (left front radiator support) G105 (front of engine, near thermostat housing) G110 (left side of firewall, above battery) G116 (left side of firewall, above battery) G400 (upper half of left "d" pillar) G401 (upper half of right "d" pillar) Haz sw Hazard Head Headlamp & panel dimmer switch Hot at all times Hot in run or start I/p fuse block Instru- ment panel cluster Interior light system Left front marker lamp Left front park/ turn signal lamp Left rear marker lamp Left tail/ stop/ turn signal lamp Left turn ind. Left turn switch License lamp Lt turn sig in Multi- function turn signal lever Nca Normal Off Park Park lamp relay (in conven- ience center) Park lps fuse 9 20a Pl input Pl rly enable Pnk Red Right front marker lamp Right front park/ turn signal lamp Right rear marker lamp Right tail/ stop/ turn signal lamp Right turn ind. Right turn switch Rt turn sig in S101 (forward lamp harn, 4 cm from right park/ turn lamp breakout) S102 (forward lamp harness, 4 cm from left headlamp breakout) S103 (forward lamp harn, 3 cm from left headlamp breakout) S104 S204 S206 S211 (i/p harn, 6 cm from instrument cluster conn breakout) S212 (i/p harn, 11.5 cm from i/p to steering column conn breakout) S217 S250 S256 S303 S319 S320 (body harn, near g400 breakout) S400 (body harn, near chmsl breakout) S402 (body harn, near right rear door breakout) S403 Sound systems Stop lamp switch (above brake pedal) Stop/ haz fuse 1 20a Tn sw Turn signal/ hazard flasher module (in convenience center) Turn- b/u fuse 16 20a Underhood fuse/relay center (on left side of firewall) Upfit- bat maxi fuse p8 30a
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 2) for Chevrolet Astro 2003 List of elements for Ground Distribution Wiring Diagram (1 of 2) for Chevrolet Astro 2003: 61 (vanity mirror harness, 8 cm from left vanity mirror breakout) A/c compressor clutch A/c low pressure switch A/c relay A/t shift lock control solenoid A16 Ambient air temperature sensor Blower motor switch- a/c auxiliary Blower motor switch- heater auxiliary Body control module (bcm) C10 C201 C303 Center high mounted stop lamp (chmsl) resistor Convenience center Coolant bypass valve solenoid Cruise control module (ccm) Data link connector (dlc) Diode 1 Door lock switch- driver Driver information center (dic) Driver seat adjuster switch E15 E16 Fuel pump relay G104 (behind receiver drier) G105 (front of engine, in thermostat housing) G107 (left rear of engine block) G110 (left side of firewall, behind battery) Headlamp & panel dimmer switch Ignition control module (icm) Ignition key alarm switch Ignition switch Instrument panel cluster (ipc) Left "b" pillar breakout, toward top of vehicle) s315 Mass air flow (maf) sensor Nca Outside rearview mirror switch Park/neutral position (pnp) switch Powertrain control module (pcm) Rear seat audio (rsa) controller (if equipped) Relay block 1 Relay block 2 S111 (engine harness, 17 cm from fuse block-underhood breakout) S155 (engine harness, 25 cm from fuse block- underhood breakout) S204 (i/p harness, 9.5 cm from c201 in lower half of steering column) S206 (i/p harness, 4 cm from c201, in lower half of steering column) S225 S236 S325 Starter enable relay Steering column ground- molded Tow/ haul switch Transfer case shift control module Turn signal/ hazard flasher module Underhood fuse block Upfitter accy relay Vanity mirror lamp- left Vanity mirror lamp- right Window master switch- driver Windshield wiper motor & module Ground Distribution Wiring Diagram (2 of 2) for Chevrolet Astro 2003 List of elements for Ground Distribution Wiring Diagram (2 of 2) for Chevrolet Astro 2003: 97 (behind bottom of left "b" pillar) (front of left rear wheelwell) (left kick panel) (left rear of vehicle) (on the left rear side of frame) (right front radiator support) (right kick panel) (upper half of left "d" pillar) (upper half of right "d" pillar) 15 cm from vehicle speed sensor) Air temperature actuator Audio amplifier Auxiliary power- outlet- front 1 Auxiliary power- outlet- front 2 Battery Blower motor resistor assembly Blower motor- a/c auxiliuary Blower motor- heater auxiliuary Brake pressure differential switch C112 C302 C333 Center high mounted stop lamp (chmsl) Cigar lighter Conven- ience center Courtesy reading lamp- center Door lock relay Door lock switch- front passenger Driver door unlock relay Electronic brake control module (ebcm) Engine cover ground Front courtesy reading lamp Fuel pump & sender assembly Fuse block- underhood G100 G101 (left front radiator support) G102 (left side radiator support) G103 (lower right side of engine block) G106 (left rear of engine) G200 G300 G301 G302 G303 G400 G401 G403 G404 Garage door opener Headlamps relay Horn- right Hvac control assembly I/p compartment lamp Inflatable restraint sensing & diagnostic module Knock sensor (ks) shield Left back-up lamp Left front park/turn signal lamp Left horn Left marker lamp Left tail/ stop & turn lamp License lamp Liftglass lock/ unlock relay Liftglass release actuator Nca Overhead console Radio Reading lamps (1 of 4) Rear auxiliary power outlet Rear door jamb switch Rear window defogger grid Rear window washer fluid pump Rear window wiper/ washer module Rear window wiper/ washer switch Relay block 1 Remote control door lock receiver Right backup lamp Right front park/ turn signal lamp Right rear side marker lamp Right tail/stop & turn lamp S100 (forward lamp harness, 8 cm from right head- lamp breakout) S104 (forward lamp harn, 17 cm from left headlamp lamp breakout) S110 (engine harn, 24 cm from fuse block-underhood breakout) S127 (engine harness, 11 cm from park/ neutral position switch) S134 (engine harn, 5 cm from knock sensor breakout) S229 (i/p harness, 4 cm from air temperature actuator motor breakout, toward right side of dash) S234 (i/p cowl harness, 28 cm from cigar lighter connector) S319 (body harn, 10 cm from g400 breakout) S403 (right rear "d" pillar, 5 cm from right rear door breakout) S407 (liftgate body harness, 20 cm from g403 breakout) S601 (right door harness, 4 cm from power door lock switch breakout) Seat belt buckle switch Upfitter connector Vehicle speed sensor (vss) shield W/ overhead console W/o overhead console Window switch- front passenger Windshield washer fluid pump
HEADLIGHTS Headlights Wiring Diagram for Chevrolet Astro 2003 List of elements for Headlights Wiring Diagram for Chevrolet Astro 2003: 62 (fwd lamp harn, 10.5 cm from left headlamp breakout) (fwd lamp harn, 4 cm from left headlamp breakout) 5v ref A11 Ambient light sensor (top center of dash) Auto Body control module (bcm) (above radio) C201 Composite headlamps Daytime running lamps diode (on lower part of left "b" pillar) Daytime running lamps relay Drl relay crtl E10 E11 E12 E13 Flash to pass G101 (left front radiator support) G110 (left side of firewall) G110 (left side of firewall, above battery) Gauges fuse 4 10a Head Headlamp & panel dimmer switch Headlamp relay Headlp enable Headlp req Hi beam sig Hot at all times Hot in run or start I/p fuse block (behind left side of dash) Left headlamp Left high beam headlamp Left low beam headlamp Lh hdlp fuse 15a Lighting fuse 40a Multifunction turn signal lever Off Park Photo cell Pnk Red Relay block 2 (behind left side of dash) Rh hdlp fuse 15a Right headlamp Right high beam headlamp Right low beam headlamp S105 S106 S110 S131 S132 S133 S206 S213 S254 (i/p harn, near lower half of steering column) S255 (i/p harn, near left side front of dash) S257 (i/p harn, 12.5 cm from instrument cluster breakout) S330 Sealed beam headlamps Tan Tbc fuse 15 10a Underhood fuse block (on left side of firewall)
HORN Horn Wiring Diagram for Chevrolet Astro 2003 List of elements for Horn Wiring Diagram for Chevrolet Astro 2003: 16 C1 body control module (above radio) Convenience center (left of i/p fuse block, near left kick panel) G100 (right front radiator support) G101 (left front radiator support) Horn mini fuse 20a Horn relay Horn switch Hot at all times Left horn (center of radiator support) Right horn (center of radiator support) S100 S104 S107 (forward lamp harn, 54cm from left headlamp breakout) S259 (i/p harn, 5cm from radio connectors breakout) S327 Underhood fuse block
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram for Chevrolet Astro 2003 List of elements for Instrument Cluster Wiring Diagram for Chevrolet Astro 2003: 65 (not used) A10 A11 Abs system Air bag ind B10 B11 Batt Brake ind Charge ind Check gauges ind Check oil ind Computer data lines system Coolant temp gauge Cruise fuse 6 10a Door ajar ind Engine controls system Engine oil pressure sensor (on top rear of engine) Exterior lights system Fuel gauge G105 (on thermostat housing) G110 (next to battery) Gauges fuse 4 10a Gnd High beam ind Hot at all times Hot in on Hot in on or start Hot w/ headlamp sw in park or head I/p fuse block (behind left side of dash) I/p illum volt Ign 1 Illum fuse 14 10a Illumination (6 bulbs) Ing 3 Instrument cluster Left turn ind Low fuel ind Mil control Odometer Off/ run/ start Oil gauge Oil press Pnk Powertrain control module (below fuse block, on left side of firewall) Prnd321 Radio batt fuse 19 10a Right turn ind S201 S204 S206 S213 S219 Seat belt ind Security ind Serial data Service 4wd ind Service engine soon ind Spare Speedometer gauge Tow/haul ind Trans fuse 20 10a Trip reset Volts gauge Vss Overhead Console Wiring Diagram for Chevrolet Astro 2003 List of elements for Overhead Console Wiring Diagram for Chevrolet Astro 2003: 21 (i/p harness, 32 cm from i/p fuse block breakout) s130 (overhead console harn, 18 cm from driver information center connector) Ambient air temperature sensor (center of core support, in front of radiator) C303 Computer data lines system Driver information center G105 (front of engine, near thermostat housing) Garage door opener circuit Hot in accy or run I/p fuse block (behind left side of dash) Instrument cluster Interior lights system Radio accy fuse 2 10a Red S117 S204 S246 S315 (w/ rear radio controls only) S328 (w/ rear radio controls) S341 Vss
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram (1 of 2) for Chevrolet Astro 2003 List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Chevrolet Astro 2003: 40 A2 crtsy lmp sig b2 right dr sw b4 left dr sw b6 lmp def sw c3 A3 courtesy lmp b10 side dr sw b11 rear dr sw b12 b+ lmp rqust b6 park lmp in c2 A8 interior lmp c1 enable rly Body control module (above radio) Breakout) C302 Center courtesy/ reading lamps Courtesy lamp relay Ctsy fuse 3 20a Dome lamp Driver door jamb switch Front courtesy/ reading lamps Front dome/ reading lamps Front passenger door jamb switch G110 (left side of firewall, next to battery) G400 (upper half of left "d" pillar) Hot at all times I/p fuse block (behind left side of dash) Inadvertent power relay Left courtesy lamp Map lights Nca Overhead console Passenger van only Pk lps fuse 9 20a Pnk Reading lamp Reading lamp switches Rear dome lamp Relay block 1 (behind left side of dash, on dlc bracket) Right courtesy lamp Right step- well lamp S206 S220 S301 (body harn, 5 cm from courtesy/ reading lamp center breakout) S307 (body harn, 5.5 cm from courtesy/ reading lamp center breakout) S319 Side door jamb switch W/ console W/o console Courtesy Lamps Wiring Diagram (2 of 2) for Chevrolet Astro 2003 List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Chevrolet Astro 2003: 37 (i/p harn, 2.5 cm from instrument cluster breakout) s217 (left door harn, 10.5 cm from power window motor breakout) s503 (right door harn, 17 cm from power window switch breakout) s605 (vanity mirror harn, 7.5 cm from left vanity mirror breakout) s236 (vanity mirror harn, 7.5 cm from left vanity mirror breakout) s237 Convenience center (left of i/p fuse block, by left kick panel) Cover switch Dome lamp switch Dome lmp defeat switch Driver door lock switch Driver window master switch Exterior lights system Front passenger door lock switch Front passenger window switch G107 (left rear of engine block) G110 (left side of firewall, next to battery) G200 (right kick panel) G400 (upper half of left "d" pillar) Headlamp & panel dimmer switch I/p compartment lamp Left vanity mirror lamp Outside rearview mirror switch Park lamp switch Rear door jamb switch Rear seat audio (rsa) controller (on left side of vehicle, behind left "b" pillar) Right vanity mirror lamp S117 S206 S234 S256 S315 S319 S401 (body harn, 10.5 cm from right rear door breakout) S504 S601 W/ power mirrors W/ rear radio control only Instrument Illumination Wiring Diagram for Chevrolet Astro 2003 List of elements for Instrument Illumination Wiring Diagram for Chevrolet Astro 2003: 42 (6 bulbs) A12 Auxiliary a/c blower motor switch Auxiliary heater blower motor switch Body control module (above radio) C1 a C10 C5 a Convenience center (left of i/p fuse block, by left kick panel) Dim stat Driver information center (dic) G105 (front of engine, on thermostat housing) G107 (left rear of engine block) G110 (left side of firewall, next to battery) G200 (right kick panel) Garage door opener Headlamp & panel dimmer switch Hot at all times Hvac control assembly I/p fuse block I/p fuse block (behind left side of dash) Illum fuse 14 10a Instrument panel cluster Interior lamp dimmer Led dim Led dim sig Park lamps switch Pk lps fuse 9 20a Radio Rear seat audio (rsa) controller (on left side of vehicle, behind "b" pillar) Rear window wiper/ washer switch Red Remote playback device S117 S206 S219 S229 S256 S315 S341 Tan W/ rear radio control only
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 3) for Chevrolet Astro 2003 List of elements for Power Distribution Wiring Diagram (1 of 3) for Chevrolet Astro 2003: 92 (eng harn, 3 cm from fuse block-underhood breakout) (i/p harness, 10 cm from bcm connectors breakout) (i/p harness, 13cm from fuse block-i/p) s209 red (i/p harness, 17 cm from instrument cluster conn breakout) (i/p harness, 28 cm from i/p fuse block) (i/p harness, in left side front of dash) s210 (left door harness, 17 cm from power window switch breakout) (not used) (right door harness, 6 cm from power door lock switch breakout) A/c comp fuse 10a A/c enable relay A12 Abs fuse 60a Atc fuse 20a Audio amplifier Aux pwr fuse 7 25a Auxiliary power outlet-rear Auxiliary power outlets-front 1&2 Auxiliary rear a/c relay Batt fuse 50a Battery Blower motor resistor assembly Body control module (bcm) Cig ltr fuse 13 20a Cigar lighter Convenience center Ctsy fuse 3 20a Data link connector (dlc) Door lock relay Door lock switch- driver Door lock switch- front passenger Ecm-b fuse 20a Electronic brake control module (ebcm) Evaporative emission (evap) canister vent solenoid From abs fuse a (diagram 1 of 3) Frt hvac fuse 30a Fuel pump relay Fuse block- Fuse block- i/p Fuse block- underhood Fusible link G200 (right side of dash) G400 (upper half of left "d" pillar) Generator Headlamp & panel dimmer switch Headlamp dimmer switch Headlamps relay Horn fuse 20a Horn relay Htd mir/ rr defog fuse 40a Hvac control assembly I/p fuse block Inadvertent power relay Instrument panel cluster Liftgate lock/ unlock release switch Lighting fuse 40a Multi- function turn signal lever Nca Outside rearview mirror switch Park lamp relay Passenger van Pk lps fuse 9 20a Powertrain control module (pcm) Pwr accy cb 25a Radio Radio batt fuse 19 10a Rap fuse 40a Red Relay block 1 Remote control door lock receiver (rcdlr) Rr htr/ac fuse 30a S121 S133 S221 S227 S319 S322 (left "b" pillar, 4 cm from break- out toward top of vehicle) S327 S500 S600 Seat adjuster switch- driver Starter solenoid Stop lamp switch Stop/haz fuse 1 20a Tbc fuse 15 10a To illum fuse 14 (diagram 3 of 3) To lighting fuse (diagram 1 0f 3) To rap relay (diagram 3 of 3) To upfitter-batt fuse (diagram 2 of 3) Transfer case shift control module Underhood Underhood fuse block Power Distribution Wiring Diagram (2 of 3) for Chevrolet Astro 2003 List of elements for Power Distribution Wiring Diagram (2 of 3) for Chevrolet Astro 2003: 81 (engine harn, 18 cm from maf sensor breakout) (engine harness, 11 cm from fuse block-underhood breakout) (i/p harn, 17 cm from bcm connectors breakout) (i/p harn, 20 cm from fuse block- i/p) (i/p harness, 28 cm from i/p fuse block) s303 (i/p harness, 38 cm from convenience center) s324 (i/p harness, 41 cm from headlamp switch connector) s213 (i/p harness, 7 cm from conn. at lower left of steering column) (not used) A13 Acc Air bag fuse 10 10a Air temperature actuator Automatic transmission Auxiliary rear a/c relay B10 Body control module (bcm) Body control module (ebcm) Bottom of left "b" pillar) Brake fuse 18 10a C201 Convenience center Crank fuse 8 10a Cruise control module (ccm) Cruise control on/off switch Cruise fuse 6 10a E10 Electronic brake control module (ebcm) From lighting c From upfitter-accy fuse (diagram 2 of 3) Fuse (diagram 1 of 3) Fuse block- i/p Fuse block- underhood G104 (behind center of dash) Gauges fuse 4 10a Heater & a/c control module Htr-a/c fuse 12 20a Ign-a fuse 40a Ign-b fuse 40a Ignition switch Inflatable restraint sensing & diagnostic module (sdm) Instrument panel cluster (ipc) Lock Multi- function turn signal lever Multifunction turn signal lever Nca Off Park/ neutral position (pnp) switch Park/neutral position & (pnp) switch Pnk Power- train control module (pcm) Rear window wiper/ washer switch Red Relay block 2 Rr wiper fuse 23 20a Run S108 S111 S115 S201 S203 (i/p harness, toward right side of dash) S205 S224 S240 (upfitter harn, 30 red cm from convenience center) S242 (in upfitter harn, near pnk Start Starter enable relay Stop lamp switch To ign-e fuse (diagram 3 of 3) To rap relay (diagram 3 of 3) To trailer wiring harness To upfitter accy relay (diagram 2 of 3) Trans fuse 20 10a Transfer case shift control module Turn-b/u fuse 16 20a Upfitter accy relay Upfitter connector Upfitter- accy fuse 30a Upfitter- batt fuse 30a Windshield wiper motor & module Wiper fuse 17 25a Power Distribution Wiring Diagram (3 of 3) for Chevrolet Astro 2003 List of elements for Power Distribution Wiring Diagram (3 of 3) for Chevrolet Astro 2003: 59 (engine harness, 16 cm from breakout to mass airflow sensor) (engine harness, 7 cm from fuel injector harness breakout) s123 (engine harness, 9 cm from a/c low-pressure cut-off switch breakout) s119 (i/p harn, 11 cm from convenience center) s305 (i/p harn, 15 cm from convenience center) s246 (i/p harn, 4 cm from instrument cluster breakout connector) (i/p harness, 14 relay blocks breakout) s253 A/c comp relay Blower motor switch- a/c auxiliary Blower motor switch- heater auxiliary Body control module (bcm) C10 Central sequential fuel injector Convenience center Crankshaft position sensor Driver information center (dic) Ecm-i fuse 20a Eng-i fuse 20a Evaporative emission (evap) canister purge solenoid From headlamp & panel dimmer d switch (diagram 1 of 3) From ignition f switch (diagram 2 of 3) From rap fuse (diagram 1 of 3) From splice s203 (diagram 2 of 3) Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Fuse block- i/p Fuse block- underhood Heated oxygen sensor (ho2s) bank 1 sensor 1 Heated oxygen sensor (ho2s) bank 1 sensor 2 Heated oxygen sensor (ho2s) bank 2 sensor 1 Hvac control assembly Ign-e fuse 10a Ignition coil Ignition control module Illum fuse 14 10a Instrument panel cluster (ipc) Mass airflow (maf) sensor Nca Pnk Powertrain control module (pcm) Radio Radio/ accy fuse 2 10a Rap relay Rear seat audio (rsa) controller Rear window wiper/ washer switch Red Relay block 2 S116 S219 S252 (i/p harn, 20 cm from relay red blocks breakout) Underhood fuse block W/ uk6 only Window master switch- driver Window switch- front passenger Windows circuit breaker 25a
POWER DOOR LOCKS Power Door Locks Wiring Diagram, with Cargo Doors for Chevrolet Astro 2003 List of elements for Power Door Locks Wiring Diagram, with Cargo Doors for Chevrolet Astro 2003: 46 (body harn, 90.5 cm from rear seat audio controller breakout) s316 (i/p harn, 10 cm from radio connectors breakout) s228 (i/p harn, 11.5 cm from c203 breakout) s231 (i/p harn, 5 cm from right kick panel breakout) s232 Battery Body control module (above radio) Cig ltr fuse 13 20a Convenience center (left of i/p fuse block, by left kick panel) Door lock relay (behind right kick panel) Driver door lock actuator Driver door lock switch Driver door unlock relay Front passenger door lock actuator Front passenger door lock switch G200 (right kick panel) G2o0 (right kick panel) Ground Hot at all times I/p fuse block (behind left side of dash) Lf dr unlk rly ctrl Lock Lock signal Not used Pwr accy circuit breaker 30a Rear door lock motor Rear door unlock relay Relay block 1 (behind left side of dash) Remote control door lock receiver (left of instrument cluster) S223 S227 S229 S230 S330 S500 S600 Serial data Side door contact plate Side door lock motor Side dr unlk rly ctrl Srl data Tan Tbc fuse 15 10a Unlock Unlock signal W/ remote keyless entry W/o remote keyless entry Power Door Locks Wiring Diagram, with Liftgate for Chevrolet Astro 2003 List of elements for Power Door Locks Wiring Diagram, with Liftgate for Chevrolet Astro 2003: 50 (i/p harn, 10 cm from radio connectors breakout) s228 (i/p harn, 11.5 cm from c203 breakout) s231 (i/p harn, 5 cm from right kick panel breakout) s232 A tan a Battery Body control module (above radio) Cig ltr fuse 13 20a Convenience center (left of i/p fuse block, by left kick panel) Door lock relay (behind right kick panel) Driver door lock actuator Driver door lock switch Driver door unlock relay Front passenger door lock actuator Front passenger door lock switch G200 (right kick panel) Ground Hot at all times I/p fuse block (behind left side of dash) Lf dr unlk rly ctrl Liftgate lock/ unlock release switch Lock Lock signal Not used Pwr accy circuit breaker 30a Rear door lock motor Rear door unlock relay Rear dr unlk rly ctrl Relay block 1 (behind left side of dash) Release Remote control door lock receiver (left of instrument cluster) S223 S227 S229 S230 S330 S334 S335 S500 S600 Serial data Side door contact plate Side door lock motor Srl data Tan Tbc fuse 15 10a Trunk/tailgate/ fuel doors system Unlock Unlock signal W/ remote keyless entry W/o remote keyless entry
POWER MIRRORS Power Mirrors Wiring Diagram for Chevrolet Astro 2003 List of elements for Power Mirrors Wiring Diagram for Chevrolet Astro 2003: 17 Down Driver outside rearview mirror G110 (left side of firewall, behind battery) Hot at all times I/p fuse block Illumination lamps Interior lights system Left Left/ right motor Nca Outside rearview mirror switch Passenger outside rearview mirror Pwr mir adj fuse 21 5a Right S504 Selector switch Up/down motor
POWER SEATS 6-Way Power Seat Wiring Diagram for Chevrolet Astro 2003 List of elements for 6-Way Power Seat Wiring Diagram for Chevrolet Astro 2003: 19 Back Convenience center (near left kick panel) Convenience center (near left kick panel) c3 Down Driver seat adjuster switch Entire seat For- ward Front height G110 (next to battery) Hot at all times I/p fuse block (behind left side of dash) Pwr accy circuit breaker 25a Rear height S206 S227 Seat horizontal motor Seat rear vertical motor Seat vertical motor Tan
POWER WINDOWS Power Windows Wiring Diagram for Chevrolet Astro 2003 List of elements for Power Windows Wiring Diagram for Chevrolet Astro 2003: 19 (left side of firewall, behind battery) g110 (right kick panel) g200 Auto down module Driver window master switch Driver window motor Front passenger window motor Front passenger window switch Hot in rap I/p fuse block (behind left side of dash) Illum Interior lights system Left front switch Right front switch S305 S504 S601 Solid state Tan Windows circuit breaker 25a
RADIO Base Radio Wiring Diagram for Chevrolet Astro 2003 List of elements for Base Radio Wiring Diagram for Chevrolet Astro 2003: 38 (body harn, 17 cm from rsa controller breakout) (body harn, 23.5 cm from rsa controller breakout) Antenna Body ground Coaxial cable Display dim sig G200 (right side of dash) Grd Hot at all times Hot in acc or run I/p fuse block (behind left side of dash) Ignition voltage Interior lights system Left front door speaker Left rear door speaker Left rear speaker Lf (+) Lf (-) Lr (+) Lr (-) Nca Panel light Radio Radio batt fuse 19 10a Rdo accy fuse 2 10a Rf (+) Rf (-) Right front door speaker Right rear door speaker Right rear speaker Rr (+) Rr (-) S246 S309 (body harn, 4 cm from rsa controller breakout) S311 (body harn, 10.5 cm from rsa contoller breakout) S312 S313 Tan Premium Sound Radio Wiring Diagram, with Rear Controls for Chevrolet Astro 2003 List of elements for Premium Sound Radio Wiring Diagram, with Rear Controls for Chevrolet Astro 2003: 89 (body harn, 33 cm from the audio amplifier) (body harn, 26.5 cm from the audio amplifier) (body harn, 4 cm from rsa controller breakout) (right door harn, 4 cm from front passenger power window breakout) s603 6.5 cm from window motor driver breakout) A10 A11 A12 Antenna Audio amplifier (left center of vehicle, behind trim panel) Audio sig ret Aux pwr fuse 7 25a B10 B11 B12 Batt in Body ground Coaxial cable Dimmer w Display dim sig E&c data Engine controls system Exterior lamps system G105 (left rear of engine block) G200 (right side of dash) G400 (upper half of left "d" pillar) Grd Ground Hot at all times Hot in acc or run I/p fuse block (behind left side of dash) Ign voltage Ignition voltage Interior lights system Left front door speaker Left front door tweeter speaker Left output Left rear speaker Left rear sub-woofer speaker Lf (+) Lf (-) Lr (+) Lr (-) Lr (+) Lr (-) Lr sw spkr (+) Lr sw spkr (-) Nca Panel light Pnk Power grd R14 in Radio Radio batt fuse 19 10a Radio sig on Rdo accy fuse 2 10a Rear seat audio (rsa) controller (left side of vehicle, behind "b" pillar) Rem rdo cntrl Remote cd player Rf (+) Rf (-) Right front door speaker Right front door tweeter speaker Right output Right rear speaker Right rear sub-woofer speaker Rr (+) Rr (-) Rr (+) Rr (-) Rr chnl in (+) Rr sw spkr (+) Rr sw spkr (-) S117 S246 S310 (body harn, 4 cm from from rsa controller breakout) S314 S315 S317 S318 S319 S322 S328 S502 (left door harn, 10.5 cm from window motor driver breakout) S506 (left door harn, tan S602 (right door harn, 10.5 cm from front passenger power window breakout) Shield grd Tan Vss output Premium Sound Radio Wiring Diagram, without Rear Controls for Chevrolet Astro 2003 List of elements for Premium Sound Radio Wiring Diagram, without Rear Controls for Chevrolet Astro 2003: 78 (body harn, 23.5 cm from rsa controller breakout) (left side of vehicle, 4 cm from rsa controller breakout) (right door harn, 4 cm from front passenger power window breakout) s603 6.5 cm from window motor driver breakout) A10 A11 A12 Antenna Audio amplifier (left center of vehicle, behind trim panel) Audio sig ret Aux pwr fuse 7 25a B10 B11 B12 Batt in Body ground Clr Coaxial cable Dimmer w Display dim sig E&c data Engine controls system G200 (right side of dash) G400 (upper half of left "d" pillar) Grd Ground Hot at all times Hot in acc or run I/p fuse block (behind left side of dash) Ignition voltage Interior lights system Left front door speaker Left front door tweeter speaker Left output Left rear speaker Left rear sub-woofer speaker Lf (+) Lf (-) Lr (+) Lr (-) Lr (+) Lr (-) Lr sw spkr (+) Lr sw spkr (-) Nca Panel light Power grd R14 in Radio Radio batt fuse 19 10a Rdo accy fuse 2 10a Remote play- back device Rf (+) Rf (-) Right front door speaker Right front door tweeter speaker Right output Right rear speaker Right rear sub-woofer speaker Rr (+) Rr (-) Rr (+) Rr (-) Rr sw spkr (+) Rr sw spkr (-) S246 S309 S311 (body harn, 10.5 cm from rsa controller breakout) S312 (body harn, 17 cm from rsa controller breakout) S313 S319 S322 S502 (left door harn, 10.5 cm from window motor driver breakout) S506 (left door harn, tan S602 (right door harn, 10.5 cm from front passenger power window breakout) Shield grd Tan Vss output
SHIFT INTERLOCK Shift Interlock Wiring Diagram for Chevrolet Astro 2003 List of elements for Shift Interlock Wiring Diagram for Chevrolet Astro 2003: 11 Automatic transmission shift lock control solenoid (in steering column) Exterior lights system G110 (next to battery) Hot in run & start I/p fuse block (behind left side of dash) Nca Park/neutral position (pnp) switch (left center of transmission) c2 Pnk S206 Stoplight switch (above brake pedal) (closed w/ brake off) Turn b/u fuse 16 20a
STARTING/CHARGING Charging Wiring Diagram for Chevrolet Astro 2003 List of elements for Charging Wiring Diagram for Chevrolet Astro 2003: 30 (not used) (on left side radiator support) g102 (on lower right front side of eng) g103 B+ voltage Battery Battery ind Charge indicator control Class e serial data Fusible link Gauges fuse 4 10a Generator Generator field duty cycle signal Hot at all times Hot in run & start I/p fuse block (behind left side of dash) Ign 1 voltage Ign voltage Instrument panel cluster Ipc class 2 serial data Logic Pnk Power distribution system Powertrain control module (pcm) (below underhood fuse block, on left side of fire wall) Radio batt fuse 19 10a Red S121 S213 Serial data class 2 Splice pack sp261 (strapped to i/p harn, behind data link connector) Starter solenoid Starting Wiring Diagram for Chevrolet Astro 2003 List of elements for Starting Wiring Diagram for Chevrolet Astro 2003: 26 (on left center of transmission) park/neutral position (pnp) switch (on left side of evaporative housing, behind receiver drier) g104 (on left side radiator support) g102 (on lower right front side of eng) g103 Acc Batt Battery Bulb test Crank fuse 8 10a Fusible link Generator I/p fuse block (behind left side of dash) Ign a fuse 40a Ignition switch Lock Off Red Run S108 S111 S121 Start Starter enable relay Starter motor Starter solenoid Underhood fuse block (on left side of firewall)
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram for Chevrolet Astro 2003 List of elements for Supplemental Restraints Wiring Diagram for Chevrolet Astro 2003: 37 (on right front of "a" pillar, above left front door jamb switch) g300 A10 A11 A12 A13 A14 A15 A16 A17 A18 Air bag fuse 10a Air bag ind. Class 2 serial data Data Data link connector (dlc) (partial) (under left side of dash) Gages fuse 10a Ground High control Hot in run & start I/p fuse block (behind left side of dash) Ign Ignition Inflatable restraint front end discriminating sensor (on front frame crossmember) Inflatable restraint i/p module Inflatable restraint sensing & diagnostic module (under driver's seat) Inflatable restraint steering wheel module Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Logic Low control Nca Pnk S213 (in i/p harn, 41 cm from headlamp switch connector) Sensor gnd Sensor signal Shorting bar Splice pack sp261 (strapped to i/p harness, behind data link connector (dlc)
TRANSMISSION
4.3L VIN X 4.3L VIN X, A/T Wiring Diagram for Chevrolet Astro 2003 List of elements for 4.3L VIN X, A/T Wiring Diagram for Chevrolet Astro 2003: 85 (engine harn, near breakout to underhood fuse block) s112 (in the thermostat housing) +5v 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 shift solenoid 3-2 ss A/t fluid pressure manual valve position switch A12 Anti-lock brakes system Automatic transmission Body control module (above radio) Brake fuse 18 10a Brk sw Cls 2 data Convenience center Cruise control system D3, d2 D4, d2 Data link connector (under left side of dash) Ecm b fuse 20a Ecm i fuse 20a Ect sig Electronic brake control module Engine coolant temperature sensor (left side of left cyl head) Fluid temp sensor Fuel pump relay G105 G105 (in the thermostat housing) G106 (left rear of engine block) Gnd Hot at all times Hot in run Hot in run & start I/p fuse block (behind left side of dash) Ign Ignition Ignition coil, ignition control module, fuel injectors Instrument panel cluster (ipc) Lo ref Malfunction indicator lamp Mil ctrl Park/neutral position switch (left center of transmission) Pc sol hi Pc sol lo Pnk Powertrain control module (left side of firewall) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Radio Radio fuse 19 10a Range b Range c Red Red a Red b Rev, lo S109 S115 S116 S117 S127 S155 Sens gnd Splice pack sp261 (behind data link connector) Stoplamp switch (above brake pedal) Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tft sens sig Throttle position sensor (left side of throttle body) Tp sig Trans fuse 20 10a Trans rng a Underhood fuse block (left side of firewall) Vehicle speed sensor (rear of transmission) Vss hi Vss lo 4.3L VIN X, Transfer Case Wiring Diagram for Chevrolet Astro 2003 List of elements for 4.3L VIN X, Transfer Case Wiring Diagram for Chevrolet Astro 2003: 48 Atc Battery Brake C8 convenience center (left of i/p fuse block, by left kick panel) Convenience center (left of i/p fuse block, by left kick panel) Data link connector (dlc) (partial) (under left side of dash) E10 E11 E12 E13 E14 E15 E16 F10 F11 F12 F13 F14 F15 F16 Front propshaft speed sensor (near center of transfer case) Fuse 18 10a Fuse 20a G110 (left side of engine compt, behind battery) Ground Hot at all times Hot in run I/c logic I/p fuse block (behind left side of dash) Ignition Instrument panel cluster (ipc) Radio batt fuse 19 10a Rear propshaft speed sensor (near center of transfer case) Red Rr vss S206 S243 Serial data Service awd ind Sound system (radio) Sp261 (behind data link connector) Stoplamp switch, electronic brake control module) Tc motor Transfer case encoder motor (inside transfer case) Transfer case shift control module (behind left kick panel) Underhood fuse block (on left side of firewall) Voltage regulator Vss
TRUNK, TAILGATE, FUEL DOOR Rear Glass Release Wiring Diagram for Chevrolet Astro 2003 List of elements for Rear Glass Release Wiring Diagram for Chevrolet Astro 2003: 27 (i/p harn, 10cm from radio con- nectors breakout) (i/p harn, 18cm from c205 conn in right kick panel) Cig ltr fuse 13 20a Door lock relay (right kick panel) Door locks system G200 (right kick panel) G403 (upper half of left "d" pillar) Hot at all times I/p fuse block (left side of dash) Liftglass lock/unlock relay (right rear quarter panel) Liftglass lock/unlock release switch Liftglass release actuator Lock Nca Pwr accy circuit breaker 25a Rear door lock motor Release switch S223 S227 S228 S229 S230 S334 (liftgate harn, 49.5 cm from breakout to liftgate lock/ unlock relay) S335 (liftgate harn, 56 cm from breakout to liftgate lock/ unlock relay) S407 Tan Unlock
WARNING SYSTEMS Warning Systems Wiring Diagram for Chevrolet Astro 2003 List of elements for Warning Systems Wiring Diagram for Chevrolet Astro 2003: 52 (i/p harn, behind (i/p harn, behind instrument cluster) (in i/p harness, near breakout from i/p fuse block) (left front radiator support) g101 (next to battery) g110 (upper half of left "d" pillar g400 A12 B10 B11 Body control module (bcm) (above radio) Brake pressure differential switch (on brake pressure modulator valve assy) C201 Dr door ajar sw Driver door jamb switch Electronic brake control module (ebcm) (left side of frame, left of transmission) Exterior lights Head Headlamp & panel dimmer switch Hot at all times I/p fuse block Ignition key alarm switch (closed w/key in ignition) Ignition switch Instrument cluster) Instrument panel cluster (ipc) Key-in ignition sw Left seat belt sw Left turn signal Multi- function turn signal lever Nca Off Park Park brake sw sig Park brake switch (base of park brake lever) Park lamp volt Pk lps fuse 9 20a Right turn signal S110 S130 S206 S211 S212 (i/p harn, behind instrument cluster) S217 S251 (i/p harn, at base of steering column) S256 S319 Seat belt buckle switch (on driver's seat belt buckle) Serial data Splice pack sp261 (strapped to i/p harness, behind data link connector) Start Switch signal Vehicle speed sig Vss signal
WIPER/WASHER Front Wiper/Washer Wiring Diagram for Chevrolet Astro 2003 List of elements for Front Wiper/Washer Wiring Diagram for Chevrolet Astro 2003: 32 150k 240k 30k 430k 68k C201 Delay Delay/ low G100 (right front radiator support) G110 (left side of firewall, above battery) High Hot in run I/p fuse block (behind left side of dash) Inst Inst wipe Mist Mist off Multifunction turn signal lever Nca Off Pnk S100 S206 S324 Solid state Wash Washer switch Windshield washer fluid pump (in windshield washer reservoir) Windshield wiper motor & module (on center of firewall, next to cruise control module) Wipe Wiper fuse 25a Wiper switch Rear Wiper/Washer Wiring Diagram for Chevrolet Astro 2003 List of elements for Rear Wiper/Washer Wiring Diagram for Chevrolet Astro 2003: 21 12v ref Delay Delay/on G100 (right front radiator support) G403 (upper half of right "d" pillar) Ground Hot in run I/p fuse block (behind left side of dash) Interior lights system Off Park sw Park switch Rear window washer motor (in left side of liftgate) Rear window wiper motor (in center of liftgate) Rear window wiper/ washer switch Rear window wiper/washer module (in left side of liftgate) Rr wiper fuse 23 20a S100 S241 (in dash harness 69.5 cm (27.4 in) from right kick panel) S407 Wash
