The Chevrolet Blazer (1995-2005) offers rugged features such as a V6 engine, four-wheel drive, and spacious interiors, making it ideal for both off-road and urban driving. The vehicle’s electrical components are safeguarded by a system of fuses and relays.

The fuse box, located under the dashboard and in the engine bay, protects crucial systems like the headlights, windshield wipers, and radio from electrical overloads. If a fuse blows, it interrupts power to that system, preventing further damage.

The relays control high-power functions, such as the fuel pump, cooling fans, and starter motor. Relays act like switches that allow smaller currents to control larger electrical loads. A malfunctioning relay can cause significant issues, like a non-starting engine or problems with the cooling system.

Regular maintenance of the fuse box and relays ensures that the Blazer’s electrical features, from engine functions to everyday conveniences, run smoothly without interruptions or malfunctions.

MUST READ: DYI – How to Check Car Fuses?

(1995-2005) Chevrolet Blazer fuse box and relay with Diagram

WARNING

  • Never replace a fuse with one that has a higher amperage rating.
  • A fuse with a too-high amperage could damage the electrical part and cause a fire.
  • On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
  • If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
  • Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Chevrolet Blazer 1995-2005 fuse assignment

  • Cigar lighter / power outlet fuses are located in the Instrument panel fuse box. 1996, 1997 – see fuse №7 “PWR AUX”. 1998-2005 – see fuses №2 “CIGAR LTR” and №13 “AUX PWR”.

Year of production: from 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005

Fuse box location

Instrument Panel

The location of the fuses in the passenger compartment: Chevrolet Blazer (1995-2005)
The location of the fuses in the passenger compartment: Chevrolet Blazer (1995-2005)

The fuse box is located on the driver’s side of the instrument panel, behind the cover.

Engine Compartment

The location of the fuses in the engine compartment: Chevrolet Blazer (1995-2005)
The location of the fuses in the engine compartment: Chevrolet Blazer (1995-2005)

Fuse box diagrams

1995-1996

Instrument Panel
Instrument panel fuse box diagram: Chevrolet Blazer (1995-1996)
Instrument panel fuse box diagram: Chevrolet Blazer (1995-1996)

Assignment of the fuses in the instrument panel (1995-1996)

Circuit
APower Door Locks, Power Seat, Power Seat Lumbar, Remote Keyless Entry
BPower Windows
1Stoplamps, Hazard Lamps, Chime, Center High-Mounted Stoplump Relay, Center High-Mounted Stoplamp
2Dome Lamps, Cargo Lamps, Visor Vanity Mirror, Cigarette Lighter, Inside Rearview Mirror Lamp, Overhead Console l-amps, Glove Box Lamp, Horns, Horn Relay, IP Courtesy Lamps, Power Outside Rearv iew Mirror, Liftglass Release Motor, Illuminated Entry Module
3Parking Lamps, License Plate Lamps, Electric Shift Transfer Case Module, Underhood Lamp, Rear Wiper, Ashtray Lamp, Door Switch Lamp
4Alternator Field, A/C Compressor Relay, Cluster Chime Module, DRL Relay Coil, Four-Wheel-Drive Indicator Lamp, DRL Module, Rear Defogger, Transfer Case Control Module Ignition, SIR Redundant Ignition, RKE Ignition
5Oxygen Sensor Heater, Exhaust Gas Recirculation, Cam Sensor, CANN, Purge, MAS
6Blower Motor, Temperature Door Motor, HI Blower Relay Coil
7Power Auxiliary Outlets, Assembly Line Diagnostic Link
8Rear Window Defogger
9PCM/VCM Battery, ABS Battery
10PCM/VCM Ignition, Injectors, Crank Sensor, Coil Driver Module
11Radio, Inside Rearview Mirror Map Lamp, Overhead Console Reading Lamps, Rear Wiper, Rear Washer, Overhead Console Display
12DRAC, Anti-Lock Braking System, VCM IGN-3
13Clock, Radio, Battery, CD Player A/C
14Compressor Battery Feed
15Daytime Running Lamps, Fog Lamps, Fog Lamp Relay
16Turn Signals and Back-Up Lamps, Brake-Transmission Shift Interlock Solenoid
17Windshield Washer, Windshield Wiper Motor
18
19Electric Shift Transfer Case
20Crank Signal, Air Bag System
21Cluster Illumination, Radio Illumination, Heater Lamp, Four-Wheel-Drive Illumination, Chime Module, Fog Lamp Illumination, Rear Wiper Switch, Rear Defog Switch Illumination, Liftglass Release Switch Illumination, Overhead Console Illumination
22Air Bag System
23
24PRNDL Power, 4L60E Transmission

1997

Instrument Panel
Instrument panel fuse box diagram: Chevrolet Blazer (1997)
Instrument panel fuse box diagram: Chevrolet Blazer (1997)

Assignment of the fuses in the instrument panel (1997)

Circuit
APower Door Locks, Power Seal,
Power Scat Lumbar, Remote Keyless Entry
BPower Window’s, Sunroot Module/Motor
1Stoplamps, Hazard Lamps, Chime, Center High-Mounted Stoplamp Relay, Center High-Mounted Stoplamp
2Dome Lamps, Cargo Lamps, Visor Vanity Mirror, Cigarette Lighter, Inside Rearview Mirror Lamp, Overhead Console Lamps, Glove Box Lamp, Horns, Horn Relay, IP Courtesy Lamps, Power Outside Rearview Mirror, Liftglass Release Motor, Illuminated Entry Module
3Parking Lamps, License Plate Lamps, Electric Shift Transfer Case Module, Underhood Lamp, Rear Wiper, Fog Lamp Relay, Door Sw itch Lamp, Ashtray Lamp, Headlamp Switch
4A/C Compressor Relay, Cluster Chime Module, DRL Relay Coil, Four-Wheel-Drive Indicator Lamp, DRL Module, Rear Defog Timer, Transfer Case Control Module Ignition, SIR Redundant Ignition \ RKE Ignition, fuel Sender
5Oxygen Sensor Heater, Exhaust Gas Recirculation, Cam Sensor, CANN, Purge, Canister Vent Solenoid, Mass Airflow Sensor, Cam Shaft Sensor
6Blower Motor, Temperature Door Motor, HI Blower Relay Coil
7Power Auxiliary Outlets, Assembly Line Diagnostic Link
8Rear Window Defogger
9PCM/VCM Battery, Fuel Pump
10PCM/VCM Ignition, Injectors, Crank Sensor, Coil Driver Module
11Radio, inside Rearview Mirror Map Lamp, Overhead Console Reading Lamps, Rear Wiper, Rear Washer, Overhead Console Display
12Anti-Lock Braking System, VCM 1GN-3
13Clock, Radio Battery, CD Player
14A/C Compressor Battery Feed
15Daytime Running Lamps, Fog Lamps, Fog Lamp Relay
16Turn Signals and Back-Up Lamps, Brake-Transmission Shift Interlock Solenoid
17Windshield Washer, Windshield Wiper Motor
18Not Used
19Electric Shift Transfer Case
20Crank Relay, Air Bag Module
21Not Used
22Air Bag Module
23Cluster Illumination, Radio Illumination, Heater Lamp, 4WD Illumination, Chime Module, Fog Lamp Illumination, Rear Wiper Switch Illumination, Rear Defogger Switch Illumination, Liftglass Release Switch Illumination, Overhead Console Illumination
24PRNDL Power, 4L60E Automatic Transmission

1998

Instrument Panel
Instrument panel fuse box diagram: Chevrolet Blazer (1998)
Instrument panel fuse box diagram: Chevrolet Blazer (1998)

Assignment of the fuses in the instrument panel (1998)

Circuit
ANot Used
BNot Used
1Headlamp Switch, Body Control Module, Headlamp Relay
2Cigarette Lighter, Data Link Connector
3Cruise Control Module and Switch, Body Control Module, Heated Seats
4Gages, Body Control Module, Instrument Panel Cluster
5Interior Lights
6Not Used
7Power Outside Mirror, Power Lock Relay
8Courtesy Lamps, Battery Run-Down Protection
9IIVAC Control Head (Manual)
10Turn Signal
11Cluster, Engine Control Module
12Parking Lamps, Power Window Switch, Body Control Module, Ashtray Lamp
13Auxiliary Power
14Power Locks Motor
154WD Switch, Engine Controls (VCM, PCM, Transmission)
16Supplemental Inflatable Restraint, SDM Module
17Front Wiper
18Not Used
19Radio Battery
20Not Used
21HVAC (Manual), HVAC I (Automatic), HVAC Sensors (Automatic)
22Anti-Lock Brakes
23Rear Wiper
24Radio, Ignition
Engine Compartment
Under-hood fuse box diagram: Chevrolet Blazer (1998)
Under-hood fuse box diagram: Chevrolet Blazer (1998)

Assignment of the fuses and relay in the engine compartment (1998)

NameUsage
TRL TRNTrailer Left Turn
TRR TRNTrailer Right Turn
TRL B/UTrailer Back-Up Lamps
VEH B/UVehicle Back-Up Lamps
RT TURNRight Turn Signal Front
LT TURNLeft Turn Signal Front
LT TRNLeft Turn Signal Rear
RTTRNRight Turn Signal Rear
RR PRKRight Rear Parking Lamps
TRL PRKTrailer Parking Lamps
LT HDLPLeft Headlamp
RT HDLPRight Headlamp
FR PRKFront Parking Lamps
INT BATI/P Fuse Block Feed
ENG 1Engine Sensors/Solcnoids, MAP. CAM, PURGE, VENT
ECM BEngine Control Module. Fuel Pump, Module, Oil Pressure
ABSAnti-Lock Brake System
ECM 1Engine Control Module Injectors
HORNHorn
BTSIBrake-Transmission Shift Interlock
B/U LPBack-Up Lamps
A/CAir Conditioning
RAPRetained Accessory Power
O2Oxygen Sensor
IGN BColumn Feed, IGN 2. 3, 4
DRLDaytime Running Lamps
FOG LPFog Lamps
IGN AStarting and Charging IGN I
STUD #2Accessory Feeds. Electric Brake
PARK LPParking Lamps
LR PRKleft Rear Parking Lamps
IGN CStarter Solenoid, Fuel Pump. PRNDL
HTD SEATHeated Seat
ATCElectronic Transfer Case
RR DFOGRear Defogger
HVACHVAC System
TR CHMSLTrailer Center High-Mount Stop Lamp
RR WAVRear Window Wiper
CRANKClutch Switch. NSBU Switch
HAZLPHazard Lamps
VECH MSLVehicle Center High-Mount
HTD MIRHeated Mirror
STOP LPStoplamps
TBCTruck Body Computer

1999, 2000, 2001, 2002

Instrument Panel
Instrument panel fuse box diagram: Chevrolet Blazer (1999, 2000, 2001, 2002)
Instrument panel fuse box diagram: Chevrolet Blazer (1999, 2000, 2001, 2002)

Assignment of the fuses in the instrument panel (1999-2002)

Circuit
ANot Used
BNot Used
1Not Used
2Cigarette Lighter, Data Link Connector
3Cruise Control Module and Switch, Body Control Module, Heated Seats
4Gages, Body Control Module, Instalment Panel Cluster
5Parking Lamps, Power Window Switch, Body Control Module, Ashtray Lamp
6Steering Wheel Radio Controls
7Headlamps Switch, Body control Module, Headlamp Relay
8Courtesy Lamps, Battery Run-Down Protection
9HVAC Control Head (Manual)
10Turn Signal
11Cluster, Engine Control Module
12Interior lights
13Auxiliary Power
14Power Locks Motor
154WD Switch, Engine Controls (VCM, PCM, Transmission)
16Supplemental Inflatable Restraint
17Front Wiper
18Steering Wheel Radio Controls
19Radio, Battery
20Amplifier
21HVAC (Manual), HVAC I (Automatic), HVAC Sensors (Automatic)
22Anti-Lock Brakes
23Rear Wiper
24Radio, Ignition
Engine Compartment
Under-hood fuse box diagram: Chevrolet Blazer (1999, 2000, 2001, 2002)
Under-hood fuse box diagram: Chevrolet Blazer (1999, 2000, 2001, 2002)

Assignment of the fuses and relay in the engine compartment (1999-2002)

NameCircuit
TRL TRNTrailer Left Turn
TRR TRNTrailer Right Turn
TRL B/UTrailer BackUp Lamps
VEH B/UVehicle BackUp Lamps
RT TURNRight Turn Signal Front
LT TURNLeft Turn Signal Front
HDLP W/WNot Used
LT TRNLeft Turn Signal Rear
RT TRNRight Turn Signal Rear
RR PRKRight Rear Parking Lamps
TRL PRKTrailer Park Lamps
LT HDLPLeft Headlamp
RT HDLPRight Headlamp
FR PRKFront Parking Lamps
INT BATI/P Fuse Block Feed
ENG IEngine Sensors/Solenoids, MAF, CAM, PURGE, VENT
ECM BEngine Control Module, Fuel Pump Module, Oil Pressure
ABSAnti-Lock Brake System
ECM IEngine Control Module Injectors
A/CAir Conditioning
W/W PMPNot Used
HORNHorn
BTSIBrake-Transmission Shift Interlock
B/U LPBackUp Lamps
IGN BColumn Feed, IGN 2, 3, 4
RAPRetained Accessory Power
LD LEVNot Used
OXYSENOxygen Sensor
IGN EEngine
MIR/LKSMirrors, Door Locks
FOG LPFog Lamps
IGN AStarting and Charging IGN 1
STUD #2Accessory Feeds, Electric Brake
PAR KLPParking Lamps
LR PRKLeft Rear Parking Lamps
IGN CStarter Solenoid, Fuel Pump, PRNDL
HTD SEATHeated Seat
HVACHVAC System
TRCHMSLTrailer Center High Mount Stop Light
RR DFOGRear Defogger
TBCTruck Body Computer
CRANKClutch Switch, NS BU Switch
HAZLPHazard Lamps
VECHMSLVehicle Center High-Mounted Stop Lamp
HTDMIRHeated Mirror
ATCTransfer Case (Four-Wheel Drive)
STOPLPStop Lamps
RR W/WRear Window Wiper

2003, 2004, 2005

Instrument Panel
Instrument panel fuse box diagram: Chevrolet Blazer (2003, 2004, 2005)
Instrument panel fuse box diagram: Chevrolet Blazer (2003, 2004, 2005)

Assignment of the fuses in the instrument panel (2003-2005)

Circuit
ANot Used
BNot Used
1Not Used
2Cigarette Lighter, Data Link Connector
3Cruise Control Module and Switch, Body Control Module, Heated Seats
4Gages, Body Control Module, Instrument Panel Cluster
5Parking Lamps, Power Window Switch, Body Control Module, Ashtray Lamp
6Steering Wheel Radio Controls
7Headlamps Switch, Body Control Module, Headlamp Relay
8Courtesy Lamps, Battery Run-Down Protection
9Heating, Ventilation, Air Cooling Control Head (Manual)
10Turn Signal
11Cluster, Engine Control Module
12Interior Lights
13Auxiliary Power
14Power Locks Motor
154WD Switch, Engine Controls (VCM, PCM, Transmission)
16Supplemental ln-atable Restraint
17Front Wiper
18Steering Wheel Radio Controls
19Radio, Battery
20Amplifer
21Heating, Ventilation, Air Cooling (Manual), Heating,Ventilation, Air Cooling (Automatic), Heating, Ventilation, Air Cooling Sensors (Automatic)
22Anti-Lock Brakes
23Rear Wiper
24Radio, Ignition
Engine Compartment
Under-hood fuse box diagram: Chevrolet Blazer (2003, 2004, 2005)
Under-hood fuse box diagram: Chevrolet Blazer (2003, 2004, 2005)

Assignment of the fuses and relay in the engine compartment (2003-2005)

NameCircuit
TRL TRNTrailer Left Turn
TRR TRNTrailer Right Turn
TRL B/UTrailer Back Up Lamps
VEH B/UVehicle Back Up Lamps
HDLP PWRHeadlamp Power
RT TURNRight Turn Signal Front
LT TURNLeft Turn Signal Front
HDLP W/WNot Used
LTTRNLeft Turn Signal Rear
RT TRNRight Turn Signal Rear
RR PRKRight Rear Parking Lamps
TRLPRKTrailer Park Lamps
LTHDLPLeft Headlamp
RTHDLPRight Headlamp
FRPRKFront Parking Lamps
INT BATInstrument Panel Fuse Block Feed
ENG 1Engine Sensors/Solenoids, MAF, CAM, PURGE, VENT
ECM BEngine Control Module, Fuel Pump Module, Oil Pressure
ABSAnti-Lock Brake System
ECM 1Engine Control Module Injectors
F/PUMPFuel Pump
DRLDaytime Running Lamps
A/CAir Conditioning
HORNHorn
W/W PMPNot Used
HORNHorn
BTSIAutomatic Transmission Shift Lock Control System
B/U LPBack Up Lamps
IGN BColumn Feed, Ignition 2, 3, 4
STARTERStarter
RAPRetained Accessory Power
LD LEVNot Used
OXYGENOxygen Sensor
IGN EEngine
MIR/LKSMirrors, Door Locks
FOG LPFog Lamps
IGN AStarting and Charging Ignition 1
STUD #2Accessory Feeds, Electric Brake
PARKLPParking Lamps
LR PRKLeft Rear Parking Lamps
LIFTGLASSLiftglass
IGN CStarter Solenoid, Fuel Pump, PRNDL
HTDSEATPleated Seat
HVACHeating, Ventilation, Air Cooling System
TRCHMSLTrailer Center High Mount Stop Light
RRDFOGRear Defogger
TBCTruck Body Computer
CRANKClutch Switch, NSBU Switch
CHMSLCenter High Mounted Stoplamp
HAZLPHazard Lamps
VECHMSLVehicle Center High-Mounted Stop Lamp
RR DEFOGRear Defogger
HTDMIRHeated Mirror
ATCTransfer Case (Four-Wheel Drive)
STOPLPStop Lamps
RR W/WRear Window Wiper

Conclusion

For owners and enthusiasts of classic Chevrolet Blazer 1995-2005, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Chevrolet’s craftsmanship and innovation in the automotive industry during that era.

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