Diagram sections — 29 (61 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY COMPUTER COMPUTER DATA LINES CRUISE CONTROL DEFOGGERS ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS MEMORY SYSTEMS POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER SEATS POWER TOP/SUNROOF POWER WINDOWS RADIO SHIFT INTERLOCKS STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION TRUNK, TAILGATE, FUEL DOOR WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Automatic A/C Wiring Diagram for Chevrolet Blazer 2002 List of elements for Automatic A/C Wiring Diagram for Chevrolet Blazer 2002: 105 (at a/c accumulator) a/c low pressure switch (body harness, near blower motor) s118 (body harness, below i/p fuse block) sp201 (dome harness between breakouts to inside air temperature sensor & left sunshade mirror lamp, 5 cm from breakout to sensor) (engine harness, between breakouts to rear heated oxygen sensors connector & body harness connector, 7 cm from breakout to heated oxygen sensor connector) (right rear of cylinder head) g102 5 volt ref 5v ref A/c A/c comp rly ctrl A/c compres- sor clutch A/c compres- sor clutch diode A/c compressor clutch relay A/c compressor high pressure switch (on rear of a/c compressor) A/c cycling sw sig A/c fuse 10a A/c request A/c request sig A10 Air inlet Air temperature actuator (on top right side of heater) Ambient air temperature sensor (center of vehicle, left of hood latch support) B10 Battery Blower motor Blower motor control processor (on evaporator case) Body relay block (behind left side of dash, near i/p fuse block) C10 C11 C12 C13 C14 C15 C16 Class 2 Class 2 data D10 D11 D12 D13 D14 D15 D16 Data link connector (dlc) (partial) (under left side of dash) Defogger system Defrost Elec actuator drive Elec actuator fbck Electric sensor rtn G103 (right rear of cylinder head) G117 (left rear of engine compt) G202 (left side of dash) G203 (right side of dash) Gnd Grd Ground Heater Heater/ defrost Hot at all times Hot in run Hot in run & start Hvac 1 fuse 21 10a Hvac control module (center of dash, below radio) Hvac fuse 30a Hvac vacuum control solenoid valve (lower rear of heater assy) I/p fuse block (on left end of dash) Ign e fuse 10a Ignition Illumination Inside air temperature sensor (in roof over driver's door) Inside temp sens sig Interior lights system Lower disc temp sens Lower discharge air temperature sensor (on left side of floor air outlet) Mode 1 drv Mode 2 drv Mode 3 drv Mode 4 drv Mode 5 drv Mtr feed Mtr ret Nca Outside temp sens sig Power mirrors system (automatic day-night mirrors) Powertrain control module (pcm) (on right front of engine compartment) Pwm signal input Pwm signal output Rdo batt fuse 19 15a Red Rr defog S106 S240 (dash harness, 4 cm from breakout to bcm module connector & breakout to instrument cluster) S288 S302 Sensor gnd Solid state Sp200 (on body harness, center front of dash) Sp203 (dash harness, in front of ashtray) Sun load temp sens Sunload sensor (top center of dash) Tan Underhood fuse block (on top of left front inner wheelwell) Underhood fuse block (on top of left front inner wheelwell) c2 Upper disc temp sens Upper discharge air temperature sensor (on top front center of dash, above radio in duct) Compressor Wiring Diagram, Auto A/C for Chevrolet Blazer 2002 List of elements for Compressor Wiring Diagram, Auto A/C for Chevrolet Blazer 2002: 26 (air jumper harn, between g100 & secondary air injection reactor pump) s104 (at a/c acumulator) a/c low pressure switch (engine harness between breakouts to rear heated oxygen sensors connector & body harness connector, 7 cm from breakout to heated oxygen sensor connector) s106 (right rear of cylinder head) g102 (right rear of cylinder head) g103 A/c comp rly ctrl A/c compresor clutch A/c compressor clutch diode A/c compressor clutch relay A/c compressor high pressure switch (on rear of a/c compressor) A/c cycling sw sig A/c fuse 10a A/c request A/c request sig C11 Class 2 D12 Hot at all times Hot in run & start Hvac control module (center of dash, below radio) Ign e fuse 10a Nca Powertrain control module (vcm) (on right front of engine compartment) S103 (engine harn, 19.5 cm from throttle position sensor) Sp201 (body harness, below i/p fuse block) Underhood fuse block (on top of left front inner wheelwell) Compressor Wiring Diagram, Manual A/C for Chevrolet Blazer 2002 List of elements for Compressor Wiring Diagram, Manual A/C for Chevrolet Blazer 2002: 33 (air jumper harn, between g100 & secondary air injection reactor pump) s104 (engine harness, between breakouts to rear heated oxygen sensors connector & body harness connector, 7 cm from breakout to heated oxygen sensor connector) s106 (right rear of cylinder head) g102 (right rear of cylinder head) g103 A/c A/c comp rly ctrl A/c compresor clutch A/c compressor clutch diode A/c compressor clutch relay A/c compressor high pressure switch (on rear of a/c compressor) A/c fuse 10a A/c low pressure switch (at a/c accumulator) A/c low sw signal A/c request signal Bi-level a/c Blend D12 Defrost Heat Heater & a/c controller Hot at all times Hot in run Hot in run & start Hvac fuse 9 20a I/p fuse block (on left end of dash) Ign e fuse 10a Max a/c Nca Off Powertrain control module (pcm) (on right front of engine compartment) S103 (engine harn, 19.5 cm from throttle position sensor) Underhood fuse block (on top of left front inner wheelwell) Vent Manual A/C Wiring Diagram for Chevrolet Blazer 2002 List of elements for Manual A/C Wiring Diagram for Chevrolet Blazer 2002: 70 (dash harness, between breakouts for radio & bcm connector c3, 8 cm from breakout to radio) s205 (engine harness, between breakouts to rear heated oxygen sensors connector & body harness connector, 7 cm from breakout to heated oxygen sensor connector) s106 (left rear of engine compartment) g117 (left side of dash) g200 (right rear of cylinder head) g102 (right rear of cylinder head) g103 (right side of dash) g203 0.26 ohms 0.71 ohms 2.10 ohms 87a A/c A/c comp rly ctrl A/c compressor clutch A/c compressor clutch diode A/c compressor clutch relay A/c compressor high pressure switch (on rear of a/c compressor) A/c cycling sw signal A/c fuse 10a A/c low pressure switch (at a/c accumulator) A/c request signal Air temperature actuator (on top right side of heater) Bi-level Bi-level a/c Blend Blower motor (on right rear of engine compartment) Blower motor relay (on center rear of engine compartment) Blower motor resistor (on right rear of engine compartment, on blower module) Blower switch D (not used) D12 Def Heat Heater & a/c controller High Hot at all times Hot in park & head Hot in run Hot in run & start Hvac 1 fuse 21 10a Hvac fuse 30a Hvac fuse 9 20a I/p fuse block (on left end of dash) If equipped Ign e fuse 10a Illum (x4) Illum fuse 12 10a Low Max a/c Med Mode door switch Nca Norm Off Pickup Power mirrors system (automatic day/night mirror) Powertrain control module (pcm) (on right front of engine compartment) Reactor pump) s104 S103 (engine harn, 19.5 cm from throttle position sensor) S118 (body harness, between breakouts to blower motor & blower motor relay) S215 S217 (dash harness, in breakout to heater controller connectors, 6 cm into breakout) Servo amplifier Sp202 (strapped to body harness, at left center of dash) Sp203 (dash harness, in front of ashtray) Tan Temp control Underhood fuse block (on top of left front inner wheelwell) Utility Vent
ANTI-LOCK BRAKES Anti-lock Brake Wiring Diagrams for Chevrolet Blazer 2002 List of elements for Anti-lock Brake Wiring Diagrams for Chevrolet Blazer 2002: 54 (under left side of dash) data link connector (dlc) 2.2l 4.3l A10 A12 Abs fuse 22 10a Abs fuse 60a Anti-lock indicator Axle switch sig Axle switch signal Battery Body control module (bcm) (under dash, on heater case) Brake fluid level switch (on master cylinder) Brake fluid lvl sig Brake warning indicator Class 2 Computer data lines system Cruise control system Electronic brake control module (ebcm) (on left front inner fender) Front axle indicator switch (on front axle, right of differential) G102 (2.2l) (right front of engine) block) G102 (4.3l) (right rear of engine) G106 (behind left headlamp) Ground Hot at all times Hot in run I/p fuse block (on left end of dash) Ignition 3 Instrument cluster Left front wheel speed sensor Lf whl spd sens ref Lf whl spd sens sig Nca Powertrain control module (pcm) (on right front of engine compt) Pump motor Rdo batt fuse 19 15a Red Rf whl spd sens ref Rf whl spd sens sig Right front wheel speed sensor S121 (body harn, near ebcm) S203 S240 Serial data Splice pack sp201 (on body harn, behind left side of dash) Stoplight switch (on brake pedal support bracket) Tan Tcc brake switch sig Underhood fuse block Underhood fuse block (on top of left front fender) Vehicle speed signal Vss W/ electric shift control (2 speed) Wiper/ washer system
ANTI-THEFT Forced Entry Wiring Diagram for Chevrolet Blazer 2002 List of elements for Forced Entry Wiring Diagram for Chevrolet Blazer 2002: 52 (utility) 2 door utility pickup w/ pwr door locks 4 door utility A12 B10 B11 Battery Body control module (under dash, on heater case) C211 Data link connector (under left side of dash) Door sw sig Driver door jamb switch Driver door lock cylinder switch Drv dr switch Fr handle sw Front passenger door jamb switch Front passenger door lock cylinder switch G200 (left side of dash) G202 (left side of dash) G203 (right side of dash) G205 (right side of dash) G450 (left rear body corner) Ground Horn relay Horns system Hot at all times Ignition key alarm switch Instrument panel cluster Key in ign Key sw sig Left door handle switch Left rear side door jamb switch Liftgate sw Pickup Rear window wiper cutout & liftglass ajar jamb switch Right door handle switch Right rear side door jamb switch S305 (body harn, on breakout to right rear door, on pillar) S427 S501 S601 Security indicator Serial data Splice pack sp201 (below i/p fuse block) Splice pack sp202 (left center of dash) Splice pack sp203 (near ashtray) Splice pack sp204 (center of dash) Tan Tbc fuse 10a Underhood fuse block W/ pwr door locks W/o pwr door locks Pass-Key Wiring Diagram for Chevrolet Blazer 2002 List of elements for Pass-Key Wiring Diagram for Chevrolet Blazer 2002: 22 2.2l 4.3l A12 Battery Body control module (under dash, on heater case) Data link connector (under left side of dash) Engine controls system (fuel pump relay) G200 (left side of dash) Ground Hot at all times Passlock sensor (at ignition switch) Powertrain control module (on right front of engine compt) Remote control door lock receiver (behind lower left side of dash) Sensor pwr Sensor ret Sensor sig Serial data Splice pack sp201 (below i/p fuse block) Splice pack sp202 (left center of dash) Tbc fuse 10a Underhood fuse block (on top of left front inner wheelwell) W/ remote keyless entry
BODY COMPUTER Body Computer Wiring Diagrams for Chevrolet Blazer 2002 List of elements for Body Computer Wiring Diagrams for Chevrolet Blazer 2002: 85 (envoy) (others) 12v ref 5v reference A10 A11 A12 Ambient light sensor (on top left side of dash) Ambient light sensor sig Anti-theft system B10 B11 B12 Battery positive voltage Body control module (under dash, on heater case) Class 2 serial data signal Computer data lines system Courtesy lamp relay ctrl Courtesy lamp sw sig Cruise fuse 3 10a Door lock ctrl Door locks system Door unlock ctrl Driver door key sw sig Drl relay ctrl Engine controls system Exterior lights system Flash-to-pass sw sig Fog lamp relay ctrl Front fog lamp switch sig G200 (left side of dash) Gauges fuse 4 10a Gmcm serial data Ground Headlamp hi beam relay ctrl Headlamp off sig Headlights system Hlp dimmer sw hi beam sig Horn relay ctrl Horns system Hot at all times Hot in run Hot in run or start Hot with headlamp switch in head or park I/p fuse block (left end of dash) Ignition 1 voltage Ignition 3 voltage Ignition key alarm switch (part of ignition switch) Instrument cluster system Interior lamp defeat sw sig Interior lamp relay coil ctrl Interior lights system Key in ignition switch Led dimming signal Left front door open switch sig Left front door unlock relay ctrl Left front turn sw sig Left seat belt switch sig Low ref Park brake switch (at base of park brake assembly) Park brake switch sig Park lamp relay ctrl Park lp fuse 5 10a Pnk Power distri- bution system (w/ remote keyless entry) Power distribution system (rap) Rap relay coil ctrl Rear compt lock mtr unlock Rear doors/lift glass switch Remote keyless entry circuit Right front door latch switch sig Right front turn sw sig S283 Security system sensor sig Sp202 (left center of dash) Splice pack sp200 Tan Tbc fuse 10a Tow/hall switch sig Transmission system Trunk release relay ctrl Trunk, tailgate, fuel doors system Underhood fuse block Vehicle speed sensor sig Warning sytems
COMPUTER DATA LINES Computer Data Lines for Chevrolet Blazer 2002 List of elements for Computer Data Lines for Chevrolet Blazer 2002: 32 class 2 (2.2l) (4.3l) (behind right front kick panel) transfer case shift control module (not used) 2.2l 4.3l A12 Body control module (under dash, on heater case) Body relay block (behind left side of dash, near i/p fuse block) C11 Cigar ltr fuse 2 15a Class 2 Data link connector (dlc) (under left side of dash) Driver information center Driver seat memory module (under left front seat) (if equipped) Electronic brake control module (ebcm) (on left front inner fender, on brake pressure modulator valve) Electronic climate control module (w/ auto a/c) G105 (left rear of cylinder head) G200 (left front of dash) Hot at all times I/p fuse block (on left end of dash) Inflatable restraint sensing & diagnostic module (under console & carpet, between front seats) Instrument panel cluster Powertrain control module (pcm) (on right front of engine compartment) S152 Sp202 (left center of dash) Splice pack sp201 (left side of dash, below i/p fuse block) Transfer case shift control module (w/ 4wd) (behind right front kick panel) Underhood fuse block (on top of left front inner wheelwell) W/ trip computer W/ two speed electronic control
CRUISE CONTROL Cruise Control Wiring Diagram for Chevrolet Blazer 2002 List of elements for Cruise Control Wiring Diagram for Chevrolet Blazer 2002: 56 (on left side of firewall) 2-speed push button control 2.2l 4.3l 4wd only A/t A12 A13 A14 A15 Abs fuse 22 10a Antilock brake system B (2.2l) (4.3l) Bare Body computer system Body relay block (behind left side of dash) Brake cutout 1 Brake/clutch signal C116 (near top right rear of transmission) Clutch pedal position & cruise control Cruise control module Cruise fuse 3 10a Cruise on/off input Cruise status Cut-out switch (clutch pedal support bracket) D (2.2l) (4.3l) Exterior lights system G104 (left rear of cylinder head) G105 (4.3l) (left rear of cylinder head) (2.2l) (right rear of engine) G117 (left rear of engine compt) Ground Hot in run I/p fuse block (left end of dash) Ignition Instrument cluster system M/t Multifunction switch Off Powertrain control module (right front of engine compt) R/a Resume/accel input S134 S138 (body harn, left rear of engine compt) S140 S152 S203 (4.3l) Set sw Set/coast input Sp200 (body harn, center front of dash) Stoplamp switch (brake pedal support bracket) Underhood fuse block (on top of left front inner wheelwell) Vehicle speed input Vehicle speed sensor (vss) (on rear of transmission) Vss Vss high Vss low
DEFOGGERS Defogger Wiring Diagram, with Auto A/C for Chevrolet Blazer 2002 List of elements for Defogger Wiring Diagram, with Auto A/C for Chevrolet Blazer 2002: 29 (left side of dash) g202 (right rear body corner) g420 (right side of dash) g203 (right side of dash) g205 C10 D14 Driver outside rear- view mirror Front passenger outside rearview mirror Ground Hot at all times Hot in run Hot in run & start Htd mirror fuse 10a Hvac 1 fuse 21 10a Hvac control assembly I/p fuse block (on left end of dash) Ign e fuse 10a Ignition 3 voltage Nca Power distribution system Rear defogger relay control Rear window defogger grid Rear window defogger relay Rr defog fuse 30a S501 S601 Solid state Splice pack sp203 (front of ashtray) Underhood fuse block (on top of left front fender) Defogger Wiring Diagram, with Manual A/C for Chevrolet Blazer 2002 List of elements for Defogger Wiring Diagram, with Manual A/C for Chevrolet Blazer 2002: 29 (left side of dash) g202 (right rear body corner) g420 (right side of dash) g203 (right side of dash) g205 Driver outside rear- view mirror Front passenger outside rearview mirror Hot at all times Hot in run Hot in run & start Htd mirror fuse 10a Hvac 1 fuse 21 10a Hvac control assembly I/p fuse block (on left end of dash) Ign e fuse 10a Ill Interior lights system Nca On led Rear window defogger grid Rear window defogger relay Rr defog fuse 30a S217 S501 S601 Splice pack sp203 (front of ashtray) Splice pack sp204 (center of dash) Timer circuit Underhood fuse block (on top of left front fender) Utility vehicles only
ENGINE PERFORMANCE
4.3L 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Blazer 2002 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Blazer 2002: 63 (body harn, near blower motor resistor) (in exhaust, after catalytic converter) (rear of distributor) 12v ref 3-2 sol 5 v ref 5v ref Abs fuse 22 10a Battery C red Camshaft position sensor Ckp sig Class 2 data Clstr fuse 11 10a Clutch pedal position switch (on clutch pedal support bracket) Cmp sens Cpp sw Crankshaft position sensor (front of engine near crankshaft pulley) Ect sens G103 (right rear of cyl head) G105 (left rear of cyl head) Ground H02s low ref Heated oxygen sensor (bank 1 sensor 1) (in left exhaust pipe, front of converter) Heated oxygen sensor (bank 1 sensor 2) Heated oxygen sensor (bank 2 sensor 1) (in right exhaust pipe, front of converter) Ho2s high Ho2s low Hot in off, run or start Hot in run I/p fuse block Ign 1 Inj 1 Inj 2 Inj 3 Inj 4 ctrl Inj 5 Inj 6 Knock sensor (top rear of engine) Ks sig Low ref Nca Off/crk/run P/n Park/neutral position & back-up lamp switch (left side of transmission) Pnk Powertrain control module (right front of engine compt) Red S100 S101 S102 S106 S116 S138 S152 S203 Stoplamp switch (on brake pedal support bracket) Tan Tcc sw Trans sig a Trans sw b Trans sw c Trans sw p 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Blazer 2002 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Blazer 2002: 31 1-2 shift sol 2-3 shift sol 3-2 control sol A10 Automatic transmission Automatic transmission fluid pressure manual valve position switch B10 C10 Central sequential fuel injection D10 D2 sw D3 sw D4 sw E10 Ecm i fuse 15a Eng i fuse 10a Evaporative emission canister purge solenoid (top right center of engine) Evaporative emission canister vent solenoid (rear of fuel tank) Fuel inj Hot in run or start Lo sw Oxygen fuse 20a Pnk Pressure control solenoid valve Red Rev sw Tan b Tcc pwm sol Tcc sol Transmission fluid temperature sensor Under- hood fuse block 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Blazer 2002 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Blazer 2002: 39 (under left side of dash) data link connector 12v in A/c system A11 A12 Body control module (under dash, on heater case) Ecm b fuse 20a Eng spd Engine coolant temperature sensor (left cylinder head, between two rear spark plugs) Fuel pump & sender assembly (on top of fuel tank) Fuel pump prime connector Fuel pump relay Fuel tank pressure sensor (top of fuel tank) G102 (right rear of cylinder head) G114 (left rear of cylinder head) G402 (left rear crossmember) G402 (left rear frame rail) Gnd Hot at all times Instrument cluster Instrument cluster system Intake air temperature sensor (in fresh air intake duct) Maf sig Manifold absolute pressure sensor (top center of engine) Mass airflow sensor (maf) (on air intake assy) Mil input Pick-up Pick-up utility Pnk Red S152 S422 Splice pack 201 (left side of dash) Splice pack 422/423 (rear frame rail) Tan Tan b Throttle position sensor (on throttle body assembly) Underhood fuse block Utility 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Blazer 2002 List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Blazer 2002: 73 (not used) (right rear of cyl head) g103 (top rear of automatic transmission) c116 (m-m) 1-2 shift 12 v ref 2-3 shift 2wd 4wd A/c clu A/c low A/c req A/c system Anti-lock brake system Axle sw Cruise control system Cruise eng Distributor (top rear of engine) Electronic ignition control module (top right side of engine) Engine spd Evap purge Evap vent Fuel lev Fuel pmp rly G104 (left rear of cylinder head) G105 (left rear of cyl head) G117 (left rear of engine compt) Gen f Gen t/o Ground H02s htr low High voltage coil wire Ho2s htr high Ho2s htr low Iac a hi Iac a lo Iac b hi Iac b lo Iat sens Ic timing Idle air control valve (on throttle body assembly) Ign timing sig. Ignition coil (right side of engine) Ignition feed Low ref Maf sig Map sig Mil Nca Pc sol Pnk Pnk a Powertrain control module (right front of eng compt) Red S106 S134 S140 S152 Spark plugs Starting/ charging system Tach. sig. Tan Tank pres Tcc pwm sol Tcc sol Tft sensor Tp sens Trans sig a Trans sig c Transmission system Vehicle speed sensor (rear of transmission) Vss Vss hi Vss low
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Chevrolet Blazer 2002 List of elements for Back-up Lamps Wiring Diagram for Chevrolet Blazer 2002: 28 (a/t) (body harn, near breakout to rear doors) s309 (m/t) a (not used) B/u lp fuse 25a B11 c2 Back-up lamp switch (m/t) (left side of transmission) C b C1 (m/t) C1 f C3 a4 C3 b3 C8 c2 F3 c1 G450 (left rear body corner) Hot in run or start Left backup lamp Mirrors system (automatic day/ night mirror) Park/neutral position & back-up lamp switch (left side of transmission) Pnk Right backup lamp S419 S420 S427 Trailer wiring provision Trl b/u fuse 10a Underhood fuse block (on top of left front fender) Veh b/u fuse 15a Exterior Lamps Wiring Diagram for Chevrolet Blazer 2002 List of elements for Exterior Lamps Wiring Diagram for Chevrolet Blazer 2002: 88 (body harn, near breakout to chmsl lamp) s405 (center of dash) sp204 (on rear crossmember) sp423 A5 c3 A6 c3 B1 haz pwr a1 turn pwr c1 flshr out B12 c1 B2 gnd Body control module (under dash, on heater case) Body relay block (behind left side of dash) C1 a4 C1 a8 C1 c1 C1 d11 C1 e2 C10 c1 C2 c1 C3 e4 Center high mount stop lamp Cruise control system D1 c3 D10 c1 E10 c1 E9 c1 F10 c1 F11 F12 c1 Fr prk fuse 10a G111 (left radiator support) G112 (right radiator support) G205 (right side of dash) G402 (rear of left frame rail) G450 (left rear body corner) Haz lp fuse 20a Hazard Head Headlamp switch Hot at all times Hot in run or start I/p fuse block (left end of dash) Instrument cluster Interior lights system Left Left front marker lamp Left front park/ turn signal lamp Left rear license plate lamp Left rear park/turn signal lamp Left turn in Left turn ind Lr prk fuse 10a Lt trn fuse 10a Lt turn fuse 10a Multi- function switch Nca Normal Off Park Park lamp relay Park lp fuse 20a Park rly ctrl Pnk Prk lp fuse 10a Resistor (510 ohms) Right Right front marker lamp Right front park/ turn signal lamp Right rear license plate lamp Right rear park/turn signal lamp Right turn in Right turn ind Rr prk fuse 10a Rt trn fuse 10a S404 S427 Sp100 (at left radiator support) Sp101 (at right radiator support) Sp423 (on rear crossmember) Stop lp fuse 20a Stoplamp switch (on brake pedal support bracket) Tr chmsl fuse 10a Trailer wiring provisions Trl prk fuse 10a Trl trn 10a Trr trn 10a Turn fuse 20a Turn signal/ hazard flasher module (behind right side of dash) Underhood fuse block (top of left front fender) Veh chmsl fuse 10a
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Blazer 2002 List of elements for Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Blazer 2002: 77 (2.2l) (4.3l) (engine harn, between breakout for left rear & right rear eng block ground) (not used) (not used) f (two speed) (active) (w/o trip) (w/ trip) 4.3l A c2 A/c compressor clutch A/c compressor clutch diode A/c low pressure switch A/t A18 Ambient temperature sensor (w/ overhead console) Bare Battery Body relay block Brake fluid level switch Breakout to a/c comp and cutoff switch) C1 c1 Cruise control module D12 Data link connector (dlc) Daytime running lamps (drl) relay Daytime running lamps (drl) relay (zr2) Driver information center (dic) (utility) E16 c16 Electronic brake control module Fuel pump relay G100 (lower right radiator support) G101 G102 (2.2l) (right front of engine block) (4.3l) (right rear of cylinder head) G103 (2.2l) (right front of engine block) (4.3l) (right rear of cylinder head) G104 (left rear of cylinder head (4.3l) G105 (2.2l) (right rear of engine block) (4.3l) (left rear of cylinder head) G106 (right side frame rail, in front of right front wheel) G107 (right front of engine block) G108 (right of radiator support) G110 (near windshield washer pump) G111 (left of radiator support) G112 (right of radiator support) Headlamp power relay Heated oxygen sensor (ho2s) (bank 1 sensor 1) shield Heated oxygen sensor (ho2s) (bank 1 sensor 2) Ignition control module Inflatable restraint sensing & diagnostic module Instrument panel cluster (ipc) Left front fog lamp Left front park/ turn signal lamp Left horn M/t Mass airflow (maf) sensor Nca Park/ neutral position (pnp) switch Powertrain control module (pcm) Rear window washer pump motor Remote control door lock receiver Right front fog lamp Right front park/ turn signal lamp Right horn S106 (4.3l: eng harn, 7 cm from ho2s breakout 2.2l: eng harn, 25 cm from pcm breakout) S140 (engine harn, near end of vss connector) S152 Secondary air injection reactor (air) pump Sp100 (left rear of radiator support) Sp101 (right of radiator support) Starter relay Transfer case shift control module Underhood fuse block Utility Vehicle speed sensor (vss) shield Vehicle speed sensor shield W/ a/c W/ k18 W/ rke Windshield washer fluid pump Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Blazer 2002 List of elements for Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Blazer 2002: 92 (2.2l) (4.3l) (fleetside) (fleetside) right license lamp (not used) (sportside) (fleetside) (sportside) license lamp 4 door utility 4wd Air temperature actuator Ashtray lamp Automatic shift lock transmission control solenoid Automatic transmission shift level indicator lamp Automatic transmission shift lock solenoid B12 Bare Blower motor (man a/c) Blower motor control processor (auto a/c) Blower motor relay (man a/c) Body control module Body relay block C10 Cigar lighter Courtesy lamp relay Crew cab only Data link connector (dlc) Door lock relay Door unlock relay Driver door handle switch Driver door jamb switch Driver door unlock relay Driver seat belt switch Ex 4 door utility w/ liftgate Extention harn, 10 cm from vss breakout) Fog lamp switch From s427 (diagram 3 of 3) Front passenger door jamb switch Fuel pump & sender G117 (left rear of engine compartment) G200 (left front of dash) G201 (left front of dash) G203 (right side of dash) G204 (right side of dash) G207 (on right side of steering column) G402 (center of second crossmember from rear) G402 (rear of left side frame rail) G422 G475 (rear of left frame rail) Headlamp ground relay Headlamp switch Hvac control module I/p compartment lamp Ignition key alarm switch Inflatable restraint i/p module disable switch Instrument panel cluster (ipc) Left back-up lamp Left license lamp Left rear marker lamp Left rear park/turn signal lamp Motor relay) Nca Park lock solenoid Park switch Pickup Pickup & utility w/o auto a/c Radio Rear wiper/ washer switch & endgate/ liftgate window release switch Right back-up lamp Right license lamp Right rear marker lamp Right rear park/turn signal lamp S134 S335 (floor shift extension harn, between in-line connector & lamp breakout) Sp202 (left center of dash) Sp203 (near ashtray) Sp401 (rear of right frame rail) Sp402 (rear of left frame rail) Sp423 (top of rear crossmember) Sportside pickup Steering wheel controls Tan Trailer wiring provision Transfer case front propshaft speed sensor shield Transfer case rear propshaft speed sensor shield Transfer case shift control switch Utility Utility w/ auto a/c Utility w/ radio controls Utility w/o radio controls Vehicle speed sensor (vss) shield W/ column shift W/ floor shift Windshield wiper motor Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Blazer 2002 List of elements for Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Blazer 2002: 95 (8-way pwr seat) (auxiliary power tray harn, near in-line i/p connector) (left door harn, near door speaker) (left power seat harn, under left front seat) (utility) (pickup) (w/ mem) h d (6-way pwr seat) 4 door 4 door only Audio amplifier Auxiliary power outlet B a Breakout to inside air temperature sensor & left visor mirror) C10 Center high mount stop lamp Center high mount stop lamp resistor Crew cab D12 D13 Dome lamp Driver door lock & side window switch Driver door lock cylinder switch Driver heated seat assembly Driver lumbar switch Driver memory seat module Driver outside rear view mirror Driver seat adjuster switch Driver seat belt switch Front passenger door lock & side window switch Front passenger door lock & window switch Front passenger door lock cylinder switch Front passenger heated seat assembly Front passenger outside rear view mirror Front passenger seat adjuster switch Front passenger seat belt switch Front passenger seat lumbar switch G202 (left front of dash) G204 (right side of dash) G205 (right side of dash) G420 (utility) (right rear body corner) (pickup) (rear of right frame rail) G450 (left rear body corner) Inside air temperature sensor assembly Inside rear view mirror Left back-up lamp Left door handle switch Left rear door jamb switch Left rear park/ turn signal lamp Left rear tail/ stop lamp Left vanity mirror lamp Liftgate release actuator Nca Outside rear view folding mirror switch Outside rear view mirror switch Overhead console Pickup except crewcab Pickup w/ power door locks w/o keyless entry Rear window defogger grid Rear window wiper cutout & liftglass ajar jamb switch Rear window wiper motor controller Right back-up lamp Right door handle switch Right rear door jamb switch Right rear park/ turn signal lamp Right rear tail/ stop lamp Right vanity mirror lamp S269 S302 S313 S320 (right power seat harn, under right front seat) S404 (body harn, 10 cm from high mount stop lamp breakout) S419 (left tail lamp jpr harn, 8 cm from grommet) S420 (right tail lamp jpr harn, 8 cm from grommet) S427 (lr body harn, near left rear taillamp breakout) S501 Sp204 (center of dash) Sunroof module To sp202 (diagram 2 of 3) Transfer case shift control module (np1) Transfer case shift control module (np8) Turn signal/ hazard flasher module Utility Utility & crew cab Utility & crewcab Utility w/ c25 Utility w/ zm8 Utility w/o power door locks Utility, crew cab & maxi-cab W/ enhanced performance audio W/ foldilng power mirrors W/ heated seats W/ mirror lamps W/ power door locks except pickup w/o keyless entry W/ vehicle communication system W/o mirror lamps W/o vehicle communication system Window lockout switch
HEADLIGHTS Headlight Wiring Diagram, with ZR2 for Chevrolet Blazer 2002 List of elements for Headlight Wiring Diagram, with ZR2 for Chevrolet Blazer 2002: 76 (2.2l) (4.3l) (body harn, 130 cm from 48-pin conn near strng col) s202 (left radiator support) (left radiator support) g111 (right radiator support) (right radiator support) g112 (right side of dash) g203 5v ref A11 Ambient light sensor (top left side of dash) Auto B10 B12 Battery fuse 175a Body control module (under dash, on heater case) Body relay block (left side of dash) C1 d9 Daytime running lamps relay (taped to body harness, near breakout for rear washer hose) Drl relay ctrl E10 E11 E12 E13 Exterior lights system Fog lamp relay Fog lamp switch Fog lp fuse 15a Fog lp ind Fog rly ctrl Fog sw in Ftp Ftp in G102 (right front of engine block, under generator) G102 (right rear of engine) Hdlp sw fuse 7 10a Head Headlamp ctrl Headlamp power relay Headlamp switch High High beam in High beam/ flash-to- pass switch Hot at all times Hot in run I/p fuse block Ign e fuse 10a Illum Information not available Interior lights system Left fog lamp Left high beam headlamp Left low beam headlamp Light sensor Low Lt hdlp fuse 15a Multifunction switch Nca Park Park brake sw Park brake switch (base of park brake assembly) Park lamp relay Park lp fuse 20a Park rly ctrl Pnk Red Right fog lamp Right high beam headlamp Right low beam headlamp Rt hdlp fuse 15a Splice pack sp100 Splice pack sp101 Splice pack sp203 (near ashtray) Tbc fuse 10a Underhood fuse block Underhood fuse block (top of left front fender) Headlight Wiring Diagram, without ZR2 for Chevrolet Blazer 2002 List of elements for Headlight Wiring Diagram, without ZR2 for Chevrolet Blazer 2002: 76 (2.2l) (4.3l) (left radiator support) (left radiator support) g111 (right radiator support) (right radiator support) g112 (right side of dash) g203 5v ref 87a A11 Ambient light sensor (top left side of dash) Auto B10 B12 Battery fuse 175a Body control module (under dash, on heater case) Body relay block (left side of dash) C1 b12 C11 Daytime running lamps relay Drl relay ctrl E10 E11 E12 E13 Exterior lights system Fog lamp relay Fog lamp switch Fog lp fuse 15a Fog lp ind Fog rly ctrl Fog sw in Ftp Ftp in G102 (right front of engine block, under generator) G102 (right rear of engine) G200 (left side of dash) Hdlp Hdlp sw fuse 7 10a Headlamp ctrl Headlamp grounding relay Headlamp power relay Headlamp switch High High beam in High beam/ flash-to- pass switch Hot at all times I/p fuse block Illum Interior lights system Left fog lamp Left high beam headlamp Left low beam headlamp Light sensor Low Lt hdlp fuse 15a Multifunction switch Nca Park brake sw Park brake switch (base of park brake assembly) Park lamp relay Park lp fuse 20a Park rly ctrl Pklp Red Right fog lamp Right high beam headlamp Right low beam headlamp Rt hdlp fuse 15a Splice pack sp100 Splice pack sp101 Splice pack sp202 (left center of dash) Splice pack sp203 (near ashtray) Tbc fuse 10a Underhood fuse block Underhood fuse block (top of left front fender)
HORN Horn Wiring Diagram for Chevrolet Blazer 2002 List of elements for Horn Wiring Diagram for Chevrolet Blazer 2002: 20 (right of radiator support) Battery fuse 175a Body control module (under dash, on heater case) C1 c1 E3 b2 Except e09 e09 only Fuse holder (engine compt, right of radiator) G111 (left of radiator support) G112 (right of radiator support) Horn fuse 15a Horn relay Horn relay control Hot at all times Left horn (left fender wall) Red Right horn (right fender wall) Splice pack sp100 (left rear of radiator support) Splice pack sp101 Steering column Underhood fuse block (top of left front fender)
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram (1 of 2) for Chevrolet Blazer 2002 List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Chevrolet Blazer 2002: 97 (inside endgate) rear window wiper cutout & liftglass ajar jamb switch (on right side of steering column) (w/ trip computer) (w/o trip computer) A10 A11 A12 Air bag ind Air temp Ambient air temperature sensor (front center of vehicle, left of hood latch support) Anti-lock ind B10 B11 B12 Batt Block) Body control module (under dash, on heater case) Body relay block (behind left side of dash, near i/p fuse Body relay block (behind left side of dash, near i/p fuse block) Brake ind Charge ind Check gauges ind Clr Clstr fuse 11 10a Compass sensor (w/ long console: integral to driver information center, w/ short console: in headliner, right of overhead console) Coolant temperature Cruise fuse 3 10a Ctsy lamp fuse 8 10a Driver information center module (in front overhead console) Electronic brake control module (on left front inner fender, on brake pressure module valve) Eng spd Engine oil pressure gauge sensor (2.2l: right side of engine forward of coil pack, 4.3l: top rear of engine, near distributor) Exterior lights system Fuel Fused batt Fused ign G105 (2.2l: right rear of eng block, 4.3l: left rear of cylinder head) G203 (right side of dash) G207 G450 (left rear body corner) Gauges fuse 4 10a Ground High beam ind Hot at all times Hot in accy, run or rap Hot in run Hot in run or start Hot in run, bulb test or start Hot w/headlamp sw in park or head I/p fuse block (left end of dash) Ic logic Ign 1 Ign 3 Illum fuse 12 10a Illumination (6 bulb) Instrument cluster Int lite dim Interior lights system Left turn Low fuel Mil (service engine soon ind) Odometer display Off/run start Oil Over speed alarm ind P r n d 3 2 1 Park sw Park switch (in steering column) Parklamps Pnk Rdo batt fuse 19 15a Rdo ign fuse 24 10a Red Right turn S152 S205 S208 S240 S310 S427 Seat belt ind Security ind Serial data Service 4wd ind Spare Speedometer Splice pack sp201 (left side of dash) Splice pack sp203 (near ashtray) Tachometer Tail gate alarm ind Transfer case shift control module (behind right front kick panel) Trip reset Underhood fuse block (on top of left front inner fender) Upshift ind Volt Vss Vss in Instrument Cluster Wiring Diagram (2 of 2) for Chevrolet Blazer 2002 List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Chevrolet Blazer 2002: 56 (engine harn, near breakout to powertrain control module) (not used) 2.2l 2wd 4.3l 4wd Bare Body control module C116 (m-m) (near top rear of transmission) Cruise control system Ect sens grd Ect sens sig in Ect sensor in Ect sensr grd Engine controls system Engine coolant temperature sensor (in coolant piping, front of engine, Engine coolant temperature sensor (in coolant piping, on front of engine) Fuel level sens grd Fuel level sig in Fuel lvl in Fuel pump/ sender (top of fuel tank) Fuel pump/ sensder (top of fuel tank) G104 (left rear of cylinder head) G105 (left rear of cylinder head) G105 (right rear of engine block) G117 (left rear of eng compt) Mil ind Mil ind ctrl Park/neutral position & back-up lamp switch (left side of transmission) Pickup Powertrain control module (2.2l only) (right front of engine compt) Powertrain control module (4.3l only) (right front of engine compt) Prndl a Prndl a sig Prndl b Prndl b sig Prndl c Prndl c sig Prndl p Prndl p sig Radio (except bravada) S109 S134 S140 S152 S422 Serial data Splice pack sp422 (near transmission) Splice pack sp422/423 (left side of dash) Tach out Utility Vehicle speed sensor (right rear of transmission) Vss high Vss low Vss out Vss sig out
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram (1 of 2) for Chevrolet Blazer 2002 List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Chevrolet Blazer 2002: 55 2-door 4-door Anti-theft system B10 B11 B12 Body control module (under dash, on heater case) Body relay block (left side of dash, right of i/p fuse block) Cargo lamp Courtesy lamp Courtesy lamp relay Ctsy lamp fuse 8 10a Dome lmp Dr handle Dr handle sw input c3 Driver door sw input G200 (left front of dash) G202 (left front of dash) G203 (right side of dash) G205 (right side of dash) G405 (right rear body corner) Hot at all times I/p compartment lamp I/p fuse block Inadvertent power Inadvertent power lamp relay Lamp request Left console courtesy lamp Left door handle switch Left front door jamb switch Left rear door jamb switch Liftgate jamb switch c2 Nca Rear door jamb switch Rear window wiper cutout & liftgate ajar jamb switch Right console courtesy lamp Right door handle switch Right rear door jamb switch S305 (body harn, in right rear door breakout) S427 S501 S601 Sp202 Sp203 Sp204 Tan To dome lamp (diagram 2 of 2) To overhead console (diagram 2 of 2) To splice s300 (diagram 2 of 2) To splice s332 (diagram 2 of 2) Underhood lamp W/ electric lock control W/ overhead console only W/o electric lock control W/o overhead console only Courtesy Lamps Wiring Diagram (2 of 2) for Chevrolet Blazer 2002 List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Chevrolet Blazer 2002: 23 (dome lamp harn, 5 cm from visor vanity mirror lamp left) s310 (w/ ec mirror) (w/o ec mirror) (w/o ec mirror) (w/ ec mirror) C301 Chmsl breakout) Dome lamp Dome light Driver information display module From body relay block (diagram 1 0f 2) From body relay block (diagram 1 of 2) G202 (left front of dash) Inside rearview mirror or driver information display module Inside rearview mirror or drver information display w/o overhead console Left visor vanity mirror lamp Overhead console w/ sun roof Overhead console w/o sun roof Right visor vanity mirror lamp S300 (dome lamp harn, 4 cm from dome lamp breakout) S302 S310 S332 (dash to dome lamp harn, top of left "a" pillar) S332 (dome lamp harn, 6 cm from sunroof breakout) W/ full trip Instrument Illumination Wiring Diagram for Chevrolet Blazer 2002 List of elements for Instrument Illumination Wiring Diagram for Chevrolet Blazer 2002: 74 (4) bulbs (6) bulbs (left front door harn, 8 cm from radio speaker breakout) s502 (right side of dash) g203 (w/ ctf) (w/ trip) (w/o ctf) (w/o trip) 2wd pickup & utility 4wd pickup A b A12 Ash tray lamp Automatic transmission shift lever position indicator B a B12 Body control module (under dash, on heater case) Body relay block (behind left side of dash) Body relay block (left side of dash, right of i/p fuse block) C1 c1 C10 Dim Dimmer input c3 Dimming control Driver door lock & window switch Driver information center Driver information display module Exterior lamps system Fog lamp switch Front passenger door lock & window switch G200 (left front of dash) G203 (right side of dash) Garage door opener Head Headlamp switch Hot at all times Hvac control assembly I/p fuse block (left side of dash) Illum fuse 12 10a Inflatable restraint i/p module disable switch Input dimmer Instrument cluster Light switch Module breakout) Off Outside rearview mirror switch Park Pickup only Prk lp fuse 20a Prk lp fuse 5 10a Prk lps Radio Rear window defog switch Rear wiper/ washer & endgate/ liftglass window release switch Remote audio player S205 (dash harn, 8 cm from am/fm radio breakout) S282 S335 (floor shift extension harn, 7 cm from lamp breakout) S336 (floor shift extension harn, 7 cm from lamp breakout) S390 (dome lamp harness, 5 cm from console breakout) Sp202 (left center of dash) Sp203 (near ashtray) Steering wheel controls Str whl ill fuse 6 2a Tow/ haul switch Transfer case shift control switch Underhood fuse block (top of left inner wheelwell) Utility Utility w/o ecc only W/ electronic climate control W/ trip W/o electronic climate control a b W/o trip Window lockout switch (4 door)
MEMORY SYSTEMS Memory Seat Wiring Diagram for Chevrolet Blazer 2002 List of elements for Memory Seat Wiring Diagram for Chevrolet Blazer 2002: 43 (pwr seat harn, near breakout to memory module) s315 Battery Body relay box (behind left side of dash) Data link connector (under left side of dash) Drive rec Driver memory seat module (under driver's seat) Driver seat adjuster switch Driver seat front vertical motor Driver seat front vertical position sensor Driver seat horizontal motor Driver seat horizontal position sensor Driver seat rear vertical motor Driver seat rear vertical position sensor Driver seat recliner motor Front Frt vert G450 (left rear body corner) Ground Hall sensor Horiz back Horiz fwd Horiz pos Hot at all times Lateral Mem 1 Mem 2 Mem set Pwr seats circuit breaker 25a Rear Rear vert Recline Recline back Recline bk Recline fwd Red Ref voltage S304 S313 S316 (pwr seat harn, near breakout to memory module) Sens gnd Serial data Splice pack sp201 (left side of dash below i/p fuse block) Tan
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 5) for Chevrolet Blazer 2002 List of elements for Power Distribution Wiring Diagram (1 of 5) for Chevrolet Blazer 2002: 62 (2.2l) (4.3l) (air jumper harn, between ground on right radiator support & breakout to eng harn) (not used) A10 Acc Air fuse 30a Air injection reactor fuse block Air relay Air sol fuse 30a B10 B11 Battery Battery fuse 175a Body control module C10 California only Central sequential fuel injection (4.3l) D10 E10 Ecm 1 fuse 15a Eng 1 fuse 10a Evaporative emissions (evap) canister purge solenoid Evaporative emissions (evap) canister vent solenoid F10 From ecm 1 a fuse diagram 1 of 5) Fuel composition sensor (2.2l) Fuel injectors Fusible link (10 ga-red) Gauges fuse 4 10a Generator Heated oxygen sensor (ho2s) (bank 1 sensor 1) (4.3l) (bank 1 sensor 2) (2.2l) I/p fuse block Ign a fuse 40a Ignition coil (4.3l) Ignition control module (icm) Ignition switch Inflatable restraint i/p module disable switch Inflatable restraint sensing & diagnostic module Instrument panel cluster (ipc) Lock Mass air flow (maf) sensor (4.3l) Multi- function switch Nca Off Oxygen fuse 20a Pickup Pnk Powertrain control module (pcm) Red Run S105 Secondary air injection reactor pump Sir fuse 16 15a Start Starter Starter relay To b/u lp fuse (diagram 2 of 5) To eng 1 fuse (diagram 1 of 5) To ign c fuse (diagram 2 of 5) Turn fuse 10 20a Underhood fuse block Power Distribution Wiring Diagram (2 of 5) for Chevrolet Blazer 2002 List of elements for Power Distribution Wiring Diagram (2 of 5) for Chevrolet Blazer 2002: 71 (body harn, near rear doors breakout) s309 (not used) (w/ automatic day/night mirror) 2 door 4 door A/c compressor clutch relay A/t Abs fuse 60a Acc Air relay Automatic transmission shift lock (btsi) solenoid (w/ floor shift a/t) B/u lp fuse 25a B11 B12 Back-up lamp switch Blower motor relay Blower motor resistor assembly Body relay block Btsi fuse 10a C12 D12 Daytime running lamp (drl) relay Electronic brake control module (ebcm) From b/u lp fuse diagram 2 of 5) From ign a fuse diagram 1 of 5) From oxygen b fuse diagram 1 of 5) Haz lp fuse 20a Headlamp grounding relay Headlamp switch Hvac fuse 30a Ign b fuse 50a Ign c fuse 20a Ign e fuse 10a Ignition switch Inside rear view mirror (utility) Left back-up lamp (pickup) Left back-up lamp (utility) Lock M/t Multi- function switch Off Park lamp relay Park lp fuse 20a Park/ neutral position (pnp) switch Pnk Rear defogger relay (utility) Red Right back-up lamp (pickup) Right back-up lamp (utility) Run Secondary air injection reactor fuse block (calif) Sp204 (center front of dash) Sp400 (center of rear crossmember) (pickup) Start Stop lamp switch Stud 2 fuse 30a To clstr fuse (diagram 4 of 5) To crank fuse (diagram 4 of 5) To ign e fuse (diagram 2 of 5) To rap maxi fuse (diagram 3 of 5) To rap relay (diagram 5 of 5) To s204 (diagram 5 of 5) Trailer wiring provisions Trailer wiring provisions (utility w/ m/t) Transfer case shift control module (np1) Trl b/u fuse 10a Underhood fuse block Veh b/u fuse 15a W/ electronic climate control W/ zr2 W/o electronic climate control Power Distribution Wiring Diagram (3 of 5) for Chevrolet Blazer 2002 List of elements for Power Distribution Wiring Diagram (3 of 5) for Chevrolet Blazer 2002: 85 (auxiliary power outlet harn, near left and right aux power outlets) (body harn, near rear doors breakout) (bravada) f10 (dome lamp harn, 5 cm from left sunshade mirror lamp breakout) s310 (ex bravada) (i/p harn, 4 cm from bcm breakout) (pickup) (utility) 2 door 4 door A10 Ampf fuse 20 25a e1 Audio amplifier Automatic a/c Aux pwr fuse 13 25a Body relay block C12 C301 Cargo lamp (utility) Cigar lighter Cigar ltr fuse 2 15a Ctsy lp fuse 8 10a Data link connector (dlc) Daytime running lamp (drl) relay Dome lamp (utility) dome lamp & center high mounted stop lamp (pickup) Dome lamp (w/ sunroof) Dome lamp (w/o sunroof) Door lock relay Door unlock relay Driver information center (dic) Driver information center (dic) (w/o trip computer) Driver seat adjuster switch Driver seat lumbar switch Driver's door unlock relay Ecm b fuse 20a Fog lamp relay Fog lp fuse 15a From abs i fuse (diagram 2 of 5) From int bat fuse (diagram 3 of 5) From s223 diagram 3 of 5) Front passenger seat adjuster switch Fuel pump relay G203 (right side of dash) Garage door opener module Hdlp sw fuse 7 10a Headlamp switch Hvac control module I/p fuse block Inadvertent power lamp relay Instrument panel cluster (ipc) Int bat fuse 50a Left accessory power outlet Left console courtesy lamp Manual a/c Memory seat module Nca Power seats circuit breaker 25a (utility) Powertrain control module (pcm) Pwr lcks fuse 14 15a Radio Rap fuse 50a Rdo bat fuse 19 15a Red Right acessory power outlet Right console courtesy lamp S223 S268 S304 S311 (in left power seat harn) Sp203 (near ashtray) Tape/cd remote playback device (bravada) To hi beam fuse (diagram 3 of 5) To pwr lcks fuse 14 (diagram 3 of 5) To rap relay (diagram 5 of 5) To tbc fuse (diagram 4 of 5) Transfer case shift control module (w/ np1) Under- hood fuse block Underhood fuse block Utility Utility w/ oeverhead trip console Utility w/o overhead console & pickup Utility w/overhead W/ auto a/c: near bcm breakout) s208 W/ memory W/o memory Power Distribution Wiring Diagram (5 of 5) for Chevrolet Blazer 2002 List of elements for Power Distribution Wiring Diagram (5 of 5) for Chevrolet Blazer 2002: 68 (17 cm from sp202, left center of dash) s203 (2.2l) (4.3l) (i/p harn, in heater controller breakout) s217 (i/p harn, near i/p fuse block) s204 (not used) (w/ trip) (w/np1) (w/o np1) (w/o trip) 4wd fuse 15 10a g3 Abs fuse 22 10a Air temperature actuator Body control module Body relay block C8 e10 Clutch start switch Cruise control module Cruise fuse 3 10a Driver door lock & window switch Driver information display module Driver seat lumbar switch Electronic brake control module (ebcm) Except base pickup From 4wd fuse (diagram 5 of 5) From ignition switch pin c6 (diagram 2 of 5) From ignition switch pin d6 (diagram 2 of 5) From power seats circuit breaker (diagram 3 of 5) Front axle indicator switch Front axle vacuum solenoid (w/ np8) Front pas- senger seat lumbar switch Front passenger door lock & window switch (2 door) Frt wpr fuse 17 25a Hvac 1 fuse 21 10a Hvac control assembly Hvac control assembly (w/ c42) Hvac control assembly (w/o electronic climate control) Hvac control module Hvac fuse 9 20a I/p fuse block Inside air temperature sensor Inside rear view mirror (w/ automatic day/night mirror) Instrument panel cluster Multi- function switch Multifunction switch Nca Pickup Power window circuit breaker 30a Radio Rdo ign fuse 24 10a Rear wiper/ washer switch & endgate/ liftgate window release switch (utility) Retained accessory power (rap) relay Rr wpr fuse 23 15a Sp200 (center front of dash) Steering wheel controls (if equipped) Stop- lamp switch Str whl rdo ign fuse 18 2a Sunroof module To hvac fuse (diagram 5 of 5) Transfer case select switch (4wd) Transfer case shift control module Utility Utility w/ electronic climate control Utility w/ manual hvac control Vacuum control assembly W/o memory Window lockout switch (4 door) Windshield wiper motor
POWER DOOR LOCKS Power Door Lock Wiring Diagram for Chevrolet Blazer 2002 List of elements for Power Door Lock Wiring Diagram for Chevrolet Blazer 2002: 51 (body harn, near breakout to rear doors) s307 87a A5 c1 B11 Battery Body control module (under dash, on heater case) Body relay block Body relay block (behind left side of dash, near i/p fuse block) C211 D10 Door lock relay Door unlock relay Dr lk rly Dr unlk rly Driver door lock actuator Driver door lock and window switch Driver door unlock relay Drv dr unlk rly E10 E11 E12 Endgate or liftgate lock cylinder switch (utility w/ content theft) F10 F12 Front passenger door lock actuator Front passenger door lock and window switch G105 (2.2l) (right rear of engine block) (4.3l) (left rear of cylinder head) G200 (left front of dash) G202 (left front of dash) Ground Hot at all times I/p fuse block Ign key switch Ignition key alarm switch Left rear door lock actuator (utility) Lock Mir/lck fuse 7 3a Mirrors system Pwr lks fuse 14 15a Remote control door lock receiver (behind lower left side of dash) Right rear door lock actuator (utility) S308 (body harn, near breakout to left rear door) Splice pack sp202 (left center of dash) Tan Tan b4 Trc fuse 10a Underhood fuse block Unlock Vehicle speed system Vss W/ keyless entry
POWER MIRRORS Electrochromic Mirror Wiring Diagram for Chevrolet Blazer 2002 List of elements for Electrochromic Mirror Wiring Diagram for Chevrolet Blazer 2002: 29 (body harn, between rear door and endgate connector) A/t Ambient sensor Auto Automatic day/night mirror Automatic day/night mirror signal B/u lamp fuse 25a B11 Back-up lamp switch (on left side of trans- mission) C1 f Exterior lights system G202 (left side of dash) Headlight sensor Hot in run Hot in run or start Hvac1 fuse 21 10a I/p fuse block (on left end of dash) Left outside rearview mirror M/t Nca Off Park/neutral position (pnp) switch (on left side of transmission) Pnk Power & logic circuits S302 S309 Underhood fuse block (on top of left front fender) Veh b/u fuse 15a W/ddo Power Mirrors Wiring Diagram for Chevrolet Blazer 2002 List of elements for Power Mirrors Wiring Diagram for Chevrolet Blazer 2002: 24 Body relay block (behind left side of dash, near i/p fuse block) Day/night mirror Down Drivers outside rearview mirror E12 Electro chromatic F12 Front passenger outside rearview mirror G202 (left side of dash) Hot at all times Ilum Interior lights system Left Left/ right m Mir/lcks fuse 7 5a Motor Nca Outside rear view mirror switch Pnk Power door locks system Right S501 Underhood fuse block (left front inner wheelwell) Up/ down m
POWER SEATS 6-Way Power Seat Wiring Diagram for Chevrolet Blazer 2002 List of elements for 6-Way Power Seat Wiring Diagram for Chevrolet Blazer 2002: 24 A nca Back Body relay block Driver seat adjuster switch Driver seat front vertical motor Driver seat horizontal motor Driver seat rear vertical motor Front passenger seat adjuster switch Front passenger seat front vertical motor Front passenger seat horizontal motor Front passenger seat rear vertical motor Frt dn Frt up Fwd G450 (left rear body corner) Hot at all times Nca Power seats circuit breaker 25a Rear dn Rear up S304 S313 S320 Tan 8-Way Adjustable Power Seat Wiring Diagram for Chevrolet Blazer 2002 List of elements for 8-Way Adjustable Power Seat Wiring Diagram for Chevrolet Blazer 2002: 26 Back Body relay block Driver seat adjuster switch Driver seat front vertical motor Driver seat horizontal motor Driver seat rear vertical motor Driver seat recliner motor Front passenger seat adjuster switch Front passenger seat front vertical motor Front passenger seat horizontal motor Front passenger seat rear vertical motor Front passenger seat recliner vertical motor Frt dn Frt up Fwd G450 (left rear body corner) Hot at all times Power seats circuit breaker 25a Rear dn Rear up Recl fwd Recl rwd S304 S313 S320 Tan Heated Seats Wiring Diagram for Chevrolet Blazer 2002 List of elements for Heated Seats Wiring Diagram for Chevrolet Blazer 2002: 27 Cruise fuse 3 10a Driver heated seat assembly Driver heated seat module Driver lumbar switch Element control Front passenger heated seat assembly Front passenger lumbar switch Front passenger seat belt switch (open when buckled) G450 (left rear body corner) Ground Heated seat relay Heater element seat back Heater element seat cushion Hot at all time Hot in run Htd seat fuse 20a I/p fuse block Nca Off Pnk S313 S314 S320 S321 Splice pack sp200 Switch signal Underhood fuse block Lumbar Wiring Diagram, with Memory for Chevrolet Blazer 2002 List of elements for Lumbar Wiring Diagram, with Memory for Chevrolet Blazer 2002: 16 Driver seat lumbar motor Driver seat lumbar switch Front passenger lumbar motor Front passenger seat lumbar switch G450 (left rear body corner) Hot at all times Htd seat fuse 20a Nca Out Pnk S313 S314 (w/ heated seats) S320 S321 (w/ heated seats) S427 Underhood fuse block Lumbar Wiring Diagram, without Memory for Chevrolet Blazer 2002 List of elements for Lumbar Wiring Diagram, without Memory for Chevrolet Blazer 2002: 18 (not used) Body relay block Driver seat lumbar motor Driver seat lumbar switch Front passenger seat lumbar motor Front passenger seat lumbar switch G450 (left rear body corner) Hot at all times Htd seat fuse 20a Nca Out Pnk Power seats circuit breaker 25a S311 S313 S320 S427 Underhood fuse block
POWER TOP/SUNROOF Power Top/Sunroof Wiring Diagrams for Chevrolet Blazer 2002 List of elements for Power Top/Sunroof Wiring Diagrams for Chevrolet Blazer 2002: 26 (not used) Body relay block (behind left side of dash, near i/p fuse block) Close Driver information center (dic) (in front overhead console) G202 (left front of dash) Ground Hot in accy, run & rap Ign Ls common Ls1 Ls2 Ls3 Motor close & tilt down Motor open & Nca Open Open & tilt dwn input Power window circuit breaker 30a Red S302 Sun roof control switch Sun roof module (at front of sun roof) Sun roof motor (in front of sun roof) Sw comm Tilt up Tilt up input close &
POWER WINDOWS Power Window Wiring Diagram, 2 Door for Chevrolet Blazer 2002 List of elements for Power Window Wiring Diagram, 2 Door for Chevrolet Blazer 2002: 23 (left side of dash) g202 Body relay block (behind left side of dash, near i/p fuse block) C1 f C1 k C2 b C2 c Driver door lock & window switch Driver window regulator motor Express down module Front passenger door lock & window switch Front passenger window motor Hot in acc, run & retained acc power Hot w/headlamp switch in park or head position I/p fuse block (on left end of dash) Illum Left front window switch Park lp fuse 5 10a Power window circuit breaker 30a Right front window switch S501 S601 Side of dash) g205 Tan Power Window Wiring Diagram, 4 Door for Chevrolet Blazer 2002 List of elements for Power Window Wiring Diagram, 4 Door for Chevrolet Blazer 2002: 28 (left side of dash) g202 (right side of dash) g205 Body relay block (behind left side of dash, near i/p fuse block) C1 k C2 b Driver door lock & window switch Driver window motor Express down module Front passenger door lock & window switch Front passenger window motor G202 (left side of dash) Hot in acc, run & retained acc power Hot w/headlamp switch in park or head position I/p fuse block (on left end of dash) Illum Left front window switch Left rear side window regulator motor Left rear window switch Park lp fuse 5 10a Power window circuit breaker 30a Right rear side window regulator motor Right rear window switch S306 S501 S502 S601 Tan Window lockout switch
RADIO Radio Wiring Diagrams, with Amplifier (1 of 2) for Chevrolet Blazer 2002 List of elements for Radio Wiring Diagrams, with Amplifier (1 of 2) for Chevrolet Blazer 2002: 51 (2.2l) (4.3l) (w/trip) (w/o trip) Amp feed Ampf fuse 20 25a Antenna Audio rtn Bare Battery Body control module (under dash on, heater case) c2 Cruise control module (on left side of firewall) Dim sig Drain rtn Driver information center module (in front over- head console) E&c diag Ft aud rtn Fuse out G203 (right side of dash) Ground Hot at all times Hot in acc or run Hot in acc run or rap I/p fuse block Instrument panel cluster Interior lights system Led dim Lf audio Lr audio Lt audio Lt remote Nca Powertrain control module (on right front of engine compart) Radio Rdo batt fuse 19 15a Rdo ign fuse 24 10a Rear return Remote rtn Rf audio Rr audio Rt audio Rt remote S240 Splice pack sp200 Splice pack sp203 (i/p harn, in front of ashtray) St col sig Str whl rdo ign fuse 18 2a Tan Tape or cd player-remote playback device (in center floor console) Tape sig Transfer case shift control module (behind right front kick panel) Vss Vss signal Radio Wiring Diagrams, with Amplifier (2 of 2) for Chevrolet Blazer 2002 List of elements for Radio Wiring Diagrams, with Amplifier (2 of 2) for Chevrolet Blazer 2002: 48 A10 A11 A12 Audio amplifier (in center console) B10 B11 B12 Bare Battery Body control module (under dash, on heater case) Ft low G200 (left side of dash) G201 (left side of dash) G204 (right side of dash) G207 (on right side of steering column) Ground Ign Interior lights system Left front door speaker Left rear door speaker Lf drain Lf low Lf sp feed Lf sp rtn Lf tweet Lock coil 2 Lr low Lr sp feed Lr sp rtn Mute Park position switch (on left side of trans) Preset Pwr ant Rf low Rf sp feed Rf sp rtn Rf spk feed Right front door speaker Right rear door speaker Rr low Rr sp rtn Seek Seek dn Splice pack sp202 (i/p harn, left side of dash) Steering wheel controls Tan Vol dn Vol up Radio Wiring Diagrams, without Amplifier for Chevrolet Blazer 2002 List of elements for Radio Wiring Diagrams, without Amplifier for Chevrolet Blazer 2002: 75 (2.2l) (4.3l) (i/p harn, between bcm & radio) (i/p harn, between breakouts to lf speaker & cluster) s273 (i/p harn, between breakouts to radio & rt ctsy lamps) s274 (w/trip) (w/o trip) A12 Antenna Audio rtn Bare Battery Body control module (under dash on, heater case) c2 Body control module (under dash, on heater case) C211 Cruise control module (on left side of firewall) Dim sig Drain rtn Driver information center module (in front over- head console) E&c diag Fuse out G200 (left side of dash) G201 (left side of dash) G203 (right side of dash) G207 (on right side of steering column) Ground Hot at all times Hot in acc or run Hot in acc run or rap I/p fuse block Instrument panel cluster Interior lights system Led dim Left front door speaker Left rear speaker Lf + Lf - Lr + Lr - Lt audio Lt remote Mute Nca Park position switch (on left side of trans) Powertrain control module (on right front of engine compart) Preset Radio Rdo batt fuse 19 15a Rdo ign fuse 24 10a Remote rtn Rf + Rf - Right front door speaker Right rear speaker Rr + Rr - Rt audio Rt remote S240 S272 (i/p harn between breakout to radio and rt ctsy lamps) S275 Seek Seek dn Splice pack sp200 Splice pack sp202 (i/p harn, left side of dash) Splice pack sp203 (i/p harn, in front of ashtray) St col sig Steering wheel controls Str whl rdo ign fuse 18 2a Tan Tape or cd player- remote playback device (in center floor console) Tape sig Transfer case shift control module (behind right front kick panel) Vol dn Vol up Vss Vss signal
SHIFT INTERLOCKS Shift Interlock Wiring Diagram, with Column Shift for Chevrolet Blazer 2002 List of elements for Shift Interlock Wiring Diagram, with Column Shift for Chevrolet Blazer 2002: 17 2 door 4 door Automatic transmission shift lock solenoid (in steering column) B/u lamp fuse 25 25a B12 Btsi fuse 10a C12 G200 (left side of dash) G201 (left side of dash) Hot in run & start Park/ neutral position (pnp) switch (on left side of transmission) Pnk Splice pack sp202 (behind left center of dash) Splice pack sp204 (behind center of dash) Stoplamp switch (on brake pedal support bracket) Transmission systems (transfer case) Underhood fuse block (on top of left front inner wheelwell) Shift Interlock Wiring Diagram, with Floor Shift for Chevrolet Blazer 2002 List of elements for Shift Interlock Wiring Diagram, with Floor Shift for Chevrolet Blazer 2002: 18 A/t shift lock solenoid (part of transmission controller, in center floor console) B/u lamp fuse 25 25a B12 Body relay block (behind left side of dash) Btsi fuse 10a Btsi solenoid C12 G200 (left side of dash) G201 (left side of dash) Hot in run & start Park lock solenoid Park/ neutral position (pnp) switch (on left side of transmission) Pnk S335 Splice pack sp202 (behind left center of dash) Splice pack sp204 (behind center of dash) Stoplamp switch (on brake pedal support bracket) Underhood fuse block (on top of left front inner wheelwell)
STARTING/CHARGING Charging Wiring Diagram for Chevrolet Blazer 2002 List of elements for Charging Wiring Diagram for Chevrolet Blazer 2002: 34 (4.3l only) (4.3l) (4.3l) (2.2l) (on right front of engine compartment) powertrain control module (pcm) (w/ ctf) (w/ manual a/c) A10 Battery C1 c1 C2 c1 Charge indicator Class 2 Class ii data Fuse holder (right of radiator) Fusible link (10 ga- rust) G106 (right side frame rail, in front of right front wheel) G107 (right front of engine block) G108 (right of Generator control/ monitoring Generator l Hot at all times I/p fuse block (on left end of dash) Instrument panel cluster Not used Radiator Rdo batt fuse 19 15a Red S240 S276 Solid state Sound systems Splice pack sp201 (below i/p fuse block) Starter solenoid Voltage regulator Starting Wiring Diagram for Chevrolet Blazer 2002 List of elements for Starting Wiring Diagram for Chevrolet Blazer 2002: 48 (2.2l) a (2.2l) c (4.3l) c (4.3l) d (a/t) (m/t only) (m/t) (m/t) (a/t) (not used) A/t A11 Acc B stud Batt Battery Battery fuse 175a C1 c2 C3 e2 Clutch pedal position switch (on clutch pedal support bracket) Crank fuse 10a D11 F11 Fuse holder (right of radiator) Fusible link (10 ga- rust) G102 (2.2l: right front of engine block) (4.3l: right rear of cylinder head) G106 (right side frame rail, in front of right front wheel) G107 (right front of engine block) G108 (right of radiator support) Generator Hold- in coil Hot at all times Ign a fuse 40a Ign c fuse 20a Ignition switch Lock M/t Off P/n Park/neutral position & back-up lamp switch (on left side of transmission) Power distribution system Pull- in coil Red Run Start Starter motor Starter relay Underhood fuse block (on top of left front fender) W/4.3l engine
SUPPLEMENTAL RESTRAINTS Supplemental Restraint Wiring Diagram for Chevrolet Blazer 2002 List of elements for Supplemental Restraint Wiring Diagram for Chevrolet Blazer 2002: 44 (at right frame rail, forward of right front wheel) g101 (no connection) (right side of dash) g203 A10 A11 A12 A13 A14 A15 A16 A17 A18 Airbag indicators Class 2 serial data Data Data link connector (dlc) (partial) (under left side of dash) Front signal Ground High control Hot in run & start I/p fuse block (on left end of dash) Ign Ignition Illumination lamp Indicator control Indicator lamp Inflatable restraint ip module Inflatable restraint ip module disable switch (pickup only) Inflatable restraint sensing & diagnostic module (under console & carpet, between front seats) Inflatable restraint steering wheel module Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Interior lights system Left inflatable restraint front end discriminating sensor (on front frame crossmember) Low control Nca Pnk Right inflatable restraint front end discriminating sensor (on front frame crossmember) Shorting bar Sir fuse 16 15a Solid state Splice pack sp201 (on left end of dash) Splice pack sp203 (in front of ashtray, strapped to body harness) Switch signal
TRANSMISSION
4.3L 4.3L VIN W, A/T Wiring Diagram, 4L60-E for Chevrolet Blazer 2002 List of elements for 4.3L VIN W, A/T Wiring Diagram, 4L60-E for Chevrolet Blazer 2002: 90 (right rear of cylinder head) g103 (under dash, on heater case) body control module +5v 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 shift solenoid 3-2 ss 4wd circuit (w/ 2 speed transfer case) 4wd low A/t fluid pressure manual valve position switch A/t shift lock solenoid A10 A11 A12 Abs fuse 22 10a Automatic transmission (4l60-e) B8 c2 Bare Blower motor resistor) Brk sw Cls 2 data Clstr fuse 11 10a Cruise control & anti-lock brakes systems D3, d2 D4, d2 Data link connector (under left side of dash) Ecm b fuse 20a Ecm i fuse 15a Ect sig Electronic brake control module Engine coolant temperature sensor (on left cylinder head, between rear plugs) Fluid temp sensor Frt axle sw G104 (left rear of cylinder head) G105 (left rear of cylinder head) Gauges fuse 4 10a Gnd Hot at all times Hot in off, run, or start Hot in run Hot in run or start I/p fuse block (on left end of dash) Ign Instrument cluster Instrument panel cluster (ipc) Lo ref Mil (service engine soon ind) Mil ctrl Park/neutral position switch (left side of transmission) Pc sol hi Pc sol lo Pnk Powertrain control module (right front of engine compt) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Range b Range c Red Red a Rev, lo S106 S113 S116 S140 S152 S203 Sens gnd Solid state Splice pack sp201 (behind left side of dash) Stoplamp switch (on brake pedal support bracket) Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tft sens sig Throttle position sensor (on throttle body assembly) Tp sig Trans rng a Underhood fuse block (on top of left front fender) Utility w/ floor shift Vehicle speed sensor (right rear of trans) Vss adapter (4wd) (left side of trans) Vss hi Vss lo 4.3L VIN W, Transfer Case Wiring Diagram, with 2-Speed Automatic Transfer Case for Chevrolet Blazer 2002 List of elements for 4.3L VIN W, Transfer Case Wiring Diagram, with 2-Speed Automatic Transfer Case for Chevrolet Blazer 2002: 93 (left rear of engine compt) g117 +8v ref +8v ref out 2-hi ind 4-hi ind 4-lo ind 4wd fuse 15 10a 4wd ind 4wd lo 4wd lo ind sig 4wd sw sig Atc fuse 20a Axle sw sig Bare Body control module Body relay block (behind left side of dash) C1 e5 Channel-a Channel-b Channel-c Channel-p Class ii data Class ii serial data Clutch sol sig Crank fuse 10a Data link connector (dlc) (partial) (under left side of dash) Decoder logic E10 E11 E12 E13 E14 E15 E16 Encoder motor Encoder sig rtn F10 F11 F12 F13 F14 F15 F16 Front axle indicator switch (on front axle, right of diff) Front axle vacuum solenoid (on firewall, near windshield wiper motor) Front propshaft speed sensor Ft shaft speed hi Ft shaft speed lo Fwd G105 (left rear of cylinder head) G203 (right side of dash) G205 (right side of dash) Gauges fuse 4 10a Gnd Ground Hot at all times Hot in run Hot in run or start Hot in start I/p fuse block (on left end of dash) Ignition Illum lamps Instrument panel cluster Interior lights system Lock sol out Module ground Motor feed a Motor feed b Motor lock Nca Neutral ind Pnk Powertrain control module (right front of engine compt) Pwr Rear propshaft speed sensor Red Rr shaft speed hi Rr shaft speed lo S134 bare S152 Service 4wd ind Solid state Splice pack sp200 (center of dash) Splice pack sp201 (behind left side of dash) Splice pack sp203 (near ashtray) Splice pack sp204 (center of dash) Starting/ charging system Tan Transfer case encoder motor Transfer case shift control module (behind right front kick panel) Transfer case shift control switch Underhood fuse block Underhood fuse block (on top of left front fender) 4.3L VIN W, Transfer Case Wiring Diagram, with 2-Speed Selectable Transfer Case for Chevrolet Blazer 2002 List of elements for 4.3L VIN W, Transfer Case Wiring Diagram, with 2-Speed Selectable Transfer Case for Chevrolet Blazer 2002: 88 (a/t) pnp switch in (right front of engine compt) powertrain control module 12v battery 12v ignition (3) 2 door 2 hi request 2 hi status lamp 2wd hi indicator 2wd hi switch 4 door 4 hi request 4 hi status lamp 4 lo request 4 lo status lamp 4wd fuse 15 10a 4wd hi indicator 4wd hi switch 4wd lo in 4wd lo indicator 4wd lo selected 4wd lo switch Anti-lock brakes system Atc fuse 20a Axle sw Battery Body relay block (behind left side of dash) Btsi fuse 10a C10 C11 C12 C13 C14 C15 C16 Crank fuse 10a Cruise control system Ctsy lp fuse 8 10a D10 D11 D12 D13 D14 D15 D16 Data link connector Data link connector (dlc) (partial) (under left side of dash) Encoder channel a Encoder channel b Encoder channel c Encoder channel p Encoder channel-a Encoder channel-b Encoder channel-c Encoder channel-p Encoder ground Encoder sig ground Front axle indicator switch (on front axle, right of diff) G203 (right side of dash) G205 (right side of dash) Ground Hot at all times Hot in park or neutral Hot in run Hot in start I/p fuse block (on left end of dash) Ignition Illumination lamp Instrument cluster & sound systems Interior lights system M shift motor Motor control a Motor control b Red S121 (body harn, 6.5 cm from blower motor breakout) S208 Solid state Splice pack sp204 (center of dash) Splice pack sp200 (center of dash) Splice pack sp203 (near ashtray) Splice pack sp204 (center of dash) Starting/ charging system Stoplight switch Transfer case encoder motor Transfer case shift control module (behind right front kick panel) Transfer case shift control switch Underhood fuse block (on top of left front fender) Vehicle speed in Vs signal
TRUNK, TAILGATE, FUEL DOOR Liftgate/Endgate Release Wiring Diagram for Chevrolet Blazer 2002 List of elements for Liftgate/Endgate Release Wiring Diagram for Chevrolet Blazer 2002: 36 (2.2l) (4.3l) (w/o rke) (w/rke) a b A12 A5 c1 B10 Body control module (under dash, on heater case) Body relay block (behind left side of dash, near i/p fuse block) C (w/rke) (w/o rke) a Class 2 serial data D11 D12 E12 F10 G203 (right side of dash) G204 (right side of dash) G450 (left rear body corner) Gmcm serial data Hot at all times Left door lock cylinder switch (inside door latch assembly) Lift glass release sw sig Liftgate/endgate lock cylinder switch (on bottom center of liftgate) Liftgate/endgate window release actuator (in top of endgate) Liftglass rel relay ctrl Liftglass relay Mir/lks fuse 3a Park brake sw sig Park brake switch (on base of park brake assembly) Powertrain control module (pcm) (on right front of engine compt) Rear wiper/washer & endgate/liftgate window release switch Remote control door lock receiver (behind lower left side of dash) S427 Splice pack sp201 (body harness, under left side of dash) Splice pack sp203 (near ashtray) Transfer case shift control switch Underhood fuse block (on top of left front fender)
WARNING SYSTEMS Warning System Wiring Diagrams for Chevrolet Blazer 2002 List of elements for Warning System Wiring Diagrams for Chevrolet Blazer 2002: 66 (pickup) (right liftgate harn, 5cm before breakout to rear washer pump motor) s900 (splice pack 201 (behind left side of dash, below i/p fuse block) A12 Auto B10 B11 Battery Body control module (behind dash, on heater case) Cruise fuse 3 10a Door jam switch Door locks Driver seat belt switch (under left front seat) Exterior lights Front lt left fuse 10a Front rt turn fuse 10a G111 (left radiator support) G112 (right radiator support) G200 (left side of dash) G203 (right side of dash) G450 (left rear body corner) Gauges fuse 4 10a Ground Hdlp Headlamp req Headlamp switch Hot at all times Hot in park or head Hot in run Hot in run & start I/p fuse block Ignition 3 Ignition key alarm switch Ignition on input Instrument cluster Instrument cluster (center of dash) Interior lights Key in ign Left door jamb switch Left front park & turn signal lamp Left turn sig Liftgate ajar jamb switch (integral with liftgate latch) Park lps fuse 5 10a Park lps in Pickup Pklp Pnk Rear window wiper cutout & liftglass ajar jamb switch (near latch assembly) Right front park & turn signal lamp Right turn sig S283 S313 S427 Seat belt input Seats system Serial data Sp100 (left radiator support) Sp101 (right radiator support) Sp202 (left center of dash) Sp203 (near ashtray) Sp204 Splice pack Tan Tbc fuse 10a Underhood fuse block Utility
WIPER/WASHER Front Wiper/Washer Wiring Diagram for Chevrolet Blazer 2002 List of elements for Front Wiper/Washer Wiring Diagram for Chevrolet Blazer 2002: 20 (2.2l: right front of engine block) g102 (4.3l: right rear of cylinder head) (left rear of engine compt) g117 Frt wpr fuse 17 25a High Hot in accy or run I/p fuse block (on left end of dash) Mist Mux1 Mux2 Off Pulse Red S118 Underhood fuse block (on top of left front inner wheelwell) Washer switch Windshield washer pump (in washer fluid reservoir) Windshield wiper motor (on center of firewall) Wiper switch Wiper/ washer switch (part of multi- function switch) Rear Wiper/Washer Wiring Diagram for Chevrolet Blazer 2002 List of elements for Rear Wiper/Washer Wiring Diagram for Chevrolet Blazer 2002: 20 (2.2l: right front of engine block) g102 (4.3l: right rear of cylinder head) (body harness, near left rear taillamp breakout) s427 (left rear body corner) g450 (no connection) High Hot at all times Hot in accy & run I/p fuse block (on left end of dash) Logic Low Off Rear window washer pump (in washer fluid reservoir) Rear window wiper cutout & liftgate ajar jamb switch (in liftgate/ endgate, near latch) Rear window wiper motor (on top center of rear endgate) Rear wiper/washer switch & endgate/liftgate window release switch Rr w/w fuse 15a Rr wpr fuse 23 15a Underhood fuse block (on top of left front fender) Underhood fuse block (on top of left front inner wheelwell) Washer switch
