Isuzu Ascender (2003 – 2007) Fuse Box Location & Diagrams
The Isuzu Ascender (2003–2007) fuse box protects important electrical components and circuits throughout the vehicle. Knowing the fuse box locations, fuse assignments, and diagrams helps identify blown fuses, understand electrical functions, and troubleshoot common power-related problems for easier maintenance and repairs.
Fuse Box Location
Engine Compartment Fuse Box
It is located in the engine compartment on the driver’s side, under two covers.
Luggage Compartment Fuse Box
The fuse box is located under of the left rear seat, under two covers.
Fuse Box Diagrams
Engine Compartment Fuse Box
Isuzu Ascender(2003 – 2005)
| Type | Position | Description |
|---|---|---|
| Fuse MEGA 125A | 1 | (I/P BATT) Fuse Block Rear – B+ Bus |
| Fuse FMX/JCase 30A | 2 | (TRLR) Trailer Connector |
| Fuse FMX/JCase 60A | 3 | (ASS) Electronic Brake Control Module (EBCM) |
| Fuse FMX/JCase 60A | 4 | (AIR PUMP) Secondary Air Injection (AIR) Pump Relay |
| Fuse FMX/JCase 60A | 5 | (VSES) Electronic Brake Control Module (EBCM) |
| Fuse FMX/JCase 40A | 8 | (BLWR) Blower Motor Control Module, Blower Motor Resistor Assembly |
| Fuse FMX/JCase 40A | 9 | (IGN A) Ignition Switch – ACCY/RUN/START, RUN, START Bus |
| Fuse FMX/JCase 40A | 12 | (IGN B) Ignition Switch – ACCY/RUN, RUN/START Bus |
| Fuse MINI 30A | 15 | (ECAS) Air Suspension Compressor Assembly |
| Fuse MINI 10A | 16 | (HI HEADLAMP-RT) Headlamp – High Beam – Right |
| Fuse MINI 10A | 17 | (LO HEADLAMP-RT) Headlamp – Low Beam – Right |
| Fuse MINI 10A | 18 | (TRLR BCK/UP) Trailer Connector |
| Fuse MINI 10A | 19 | (HI HEADLAMP-LT) Headlamp – High Beam – Left |
| Fuse MINI 10A | 20 | (LO HEADLAMP-LT) Headlamp – Low Beam – Left |
| Fuse MINI 30A | 21 | (ATC) Transfer Case Encoder Motor, Transfer Case Shift Control Module |
| Fuse MINI 15A | 22 | (WSW) WSW Relay |
| Fuse MINI 20A | 23 | (WPR) Headlamp WPR Relay, REAR/WPR Relay |
| Fuse MINI 10A | 24 | (TRLR LT TRN) Trailer Connector |
| Fuse MINI 20A | 25 | (PCM B) Fuel Pump Relay, Powertrain Control Module (PCM) |
| Fuse MINI 25A | 27 | (STOP LAMP) Stop Lamp Switch |
| Fuse MINI 20A | 28 | (LTR) Cigar Lighter, Data Link Connector (DLC) |
| Fuse MINI 10A | 29 | (TRLR RT TRN) Trailer Connector |
| Fuse MINI 10A | 30 | (O2 SNSR) Heated Oxygen Sensor (HO2S) 1/2 |
| Fuse MINI 15A | 31 | (EAP) 2006: Auxiliary Water Pump Relay 1, EAP Relay, Electronic Adjustable Pedals (EAP) Relay; 2007: EAP Relay, Electronic Adjustable Pedals (EAP) Relay |
| Fuse MINI 10A | 32 | (CRNK) Powertrain Control Module (PCM) |
| Fuse MINI 10A | 33 | (BTSI) Automatic Transmission Shift Lock Actuator, Stop Lamp Switch |
| Fuse MINI 15A | 34 | (HDM) HDM Relay |
| Fuse MINI 25A | 35 | (HAZRD) Turn Signal/Hazard Flasher Module |
| Fuse MINI 10A | 36 | (TBC IGN1) Body Control Module (BCM) |
| Fuse MINI 10A | 37 | (AIR BAG) Inflatable Restraint Front Passenger Pressure System (PPS) Module, Inflatable Restraint Sensing and Diagnostic Module (SDM), Rollover Sensor |
| Fuse MINI 10A | 38 | (FAN) FAN Relay |
| Fuse MINI 10A | 39 | (IGN E) A/C Relay, Headlamp Leveling Actuators, Headlamp Switch, Inside Rearview Mirror, Instrument Panel Cluster (IPC), Park/Neutral Position (PNP) Switch, Stop Lamp Switch, Turn Signal/Multifunction Switch |
| Fuse MINI 15A | 40 | (BCK/UP) EAP Relay, Park/Neutral Position (PNP) Switch |
| Fuse MINI 15A | 41 | (PCM I) Fuel Injectors, Ignition Coils, Powertrain Control Module (PCM) |
| Fuse MINI 15A | 42 | (AIR SOL) AIR SOL Relay, Secondary Air Injection (AIR) Pump Relay |
| Fuse MINI 10A | 43 | (ETC) Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor, Powertrain Control Module (PCM) |
| Fuse MINI 10A | 44 | (TCM CNSTR) EVAP Canister Purge Solenoid, EVAP Canister Vent Solenoid, Theft Deterrent Alarm |
| Fuse MINI 30A | 45 | (ELEC BRK) Trailer Brake Wiring |
| Fuse MINI 15A | 46 | (HORN) HORN Relay |
| Fuse MINI 10A | 47 | (IPC/DIC) Instrument Panel Cluster (IPC) |
| Fuse MINI 15A | 48 | (RVC) 2007: Regulated Voltage Control Module |
| Fuse MINI 15A | 49 | (FOG LAMP) FOG LAMP Relay |
| Fuse MINI 10A | 50 | (A/C) A/C Relay |
| Fuse MINI 10A | 51 | (TBC I) Body Control Module (BCM), Theft Deterrent Alarm, Theft Deterrent Control Module |
| Fuse Puller | — | Extraction tool for fuse replacement |
| Relay | R1 | (PWR/TRN Relay) ETC, O2 SNSR |
| Relay | R2 | (STRTR Relay) Starter |
| Relay | R3 | (HEADLAMP WPR Relay) Headlamp Washer Fluid Pump |
| Relay | R4 | (REAR/WPR Relay) Rear Window Washer Fluid Pump |
| Relay | R5 | (FOG LAMP Relay) Front Fog Lamps |
| Relay | R6 | (HORN Relay) Horn Assembly |
| Relay | R7 | (FAN Relay) Cooling Fan |
| Relay | R8 | (HDM Relay) LO HEADLAMP-LT, LO HEADLAMP-RT |
| Relay | R9 | (FUEL PUMP Relay) Fuel Pump and Sender Assembly |
| Relay | R10 | (WSW Relay) Windshield Washer Fluid Pump |
| Relay | R11 | (HI HEADLAMP Relay) HI HEADLAMP-LT, HI HEADLAMP-RT |
| Relay | R12 | (A/C Relay) A/C Compressor Clutch Assembly |
| Relay | R13 | (AIR SOL Relay) Secondary Air Injection (AIR) Solenoid |
| Relay | R14 | (EAP Relay) Electronic Adjustable Pedals (EAP) Switch |
Isuzu Ascender(2006 & 2007)
| № | Name | A | Description |
|---|---|---|---|
| 1 | ECAS | 30 | Air Suspension Compressor Assembly |
| 2 | HI HEADLAMP-RT | 10 | Headlamp – High Beam – Right |
| 3 | LO HEADLAMP-RT | 10 | Head lamp – Low Beam – Right |
| 4 | TRLR BCK/UP | 10 | Trailer Connector |
| 5 | HI HEADLAMP-LT | 10 | Headlamp- High Beam – Left |
| 6 | LO HEADLAMP-LT | 10 | Headlamp – Low Beam – Left |
| 7 | WPR | 20 | HEADLAMP WPR Relay, REAR/WPR Relay |
| 8 | ATC | 30 | Transfer Case Encoder .Motor, Transfer Case Shift Control Module |
| 9 | WSW | 15 | WSW Relay |
| 10 | PCM B | 20 | FUEL PUMP Relay, Powertrain Control Module (PCM) |
| 11 | FOG LAMP | 15 | FOG LAMP Relay |
| 12 | STOP LAMP | 25 | Stop Lamp Switch |
| 13 | LTR | 20 | Cigar Lighter, Data Link Connector (DLC) |
| 15 | EAP | 15 | 2006: Auxiliary Water Pump Relay 1, EAP Relay, Electronic Adjustable Pedals (EAP) Relay 2007: EAP Relay, Electronic Adjustable Pedals (EAP) Relay |
| 16 | TBC IGN1 | 10 | Body Control Module (BCM) |
| 17 | CRNK | 10 | Powertrain Control Module (PCM) |
| 18 | AIR BAG | 10 | Inflatable Restraint Front Passenger Pressure System (PPS) Module, Inflatable Restraint Sensing and Diagnostic Module (SDM), Rollover Sensor |
| 19 | ELEC BRK | 30 | Trailer Brake Wiring |
| 20 | FAN | 10 | FAN Relay |
| 21 | HORN | 15 | HORN Relay |
| 22 | IGN E | 10 | A/C Relay, Headlamp l eveling Actuators, Headlamp Switch, Inside Rearview Mirror, Instrument Panel Cluster (IPC), Park/Neutral Position (PNP) Switch, Stop Lamp Switch, Turn Signal/Multifunction Switch |
| 23 | ETC | 10 | Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor, Powertrain Control Module (PCM) |
| 24 | IPC/DIC | 10 | Instrument Panel Cluster (IPC) |
| 25 | BTSI | 10 | Automatic Transmission Shift Lock Actuator, Stop Lamp Switch |
| 26 | TCM CNSTR | 10 | Evaporative Emission (EVAP) Canister Purge Solenoid, Evaporative Emission (EVAP) Canister Vent Solenoid, Theft Deterrent Alarm |
| 27 | BCK/UP | 15 | EAP (Relay), Park/Neutral Position (PNP) Switch |
| 28 | PCM I | 15 | Fuel Injectors, Ignition Coils, Powertra in Control Module (PCM) |
| 29 | O2 SNSR | 10 | Heated Oxygen Sensor (H02S) 1/2 |
| 30 | A/C | 10 | A/C Relay |
| 31 | TBC I | 10 | Body Control Module (BCM), Theft Deterrent Alarm, Theft Deterrent Control Module |
| 32 | TRLR | 30 | Trailer Connector |
| 33 | ASS | 60 | Electronic Brake Control Module (EBCM) |
| 34 | IGN A | 40 | Ignition Switch – ACCY/RUN/START, RUN, START BUS |
| 35 | BLWR | 40 | Blower Motor Control Module, Blower Motor Resistor Assembly |
| 36 | IGN B | 40 | Ignition Switch – ACCY/RUN, RUN/START BUS |
| 37 | HEADLAMP WPR (Relay) | — | Headlamp Washer Fluid Pump |
| 38 | REAR/WPR (Relay) | — | Rear Window Washer Fluid Pump |
| 39 | FOG LAMP (Relay) | — | Front Fog Lamps |
| 40 | HORN (Relay) | — | Horn Assembly |
| 41 | FUEL PUMP (Relay) | — | Fuel Pump and Sender Assembly |
| 42 | WSW (Relay) | — | Windshield Washer Fluid Pump |
| 43 | HI HEADLAMP (Relay) | — | HI HEADLAMP- LT, HI HEADLAMP-RT |
| 44 | A/C (Relay) | — | A/C Compressor Clutch Assembly |
| 45 | FAN (Relay) | — | Cooling Fan |
| 46 | HDM (Relay) | — | LO HEADLAMP- L T, LO HEADLAMP-RT |
| 47 | STRTR (Relay) | — | Starter |
| 48 | I/P BATT | 125 | Fuse Block- Rear – B+ Bus |
| 49 | EAP (Relay) | — | Electronic Adjustable Pedals (EAP) Switch |
| 50 | TRLR RT TRN | 10 | Trailer Connector |
| 51 | TRLR LT TRN | 10 | Trailer Connector |
| 52 | HAZRD | 25 | Turn Signal/Hazard Flasher Module |
| 53 | HDM | 15 | HDM Relay |
| 54 | AIR SOL | 15 | AIR SOL Relay, Secondary Air Injection (AIR) Pump Relay |
| 55 | AIR SOL (Relay) | — | Secondary Air Injection (AIR) Solenoid |
| 56 | AIR PUMP | 60 | Secondary Air Injection (AIR) Pump Relay |
| 57 | PWR/TRN (Relay) | — | ETC, O2 SNSR |
| 58 | VSES | 60 | Electronic Brake Control Module (EBCM) |
| 59 | RVC | 15 | 2007: Regulated Voltage Control Module |
Luggage Compartment Fuse Box
Isuzu Ascender(2003 – 2005)
| Fuse/Relay Type | Position | Description |
|---|---|---|
| MINI 30A | F1 | (LGM #2) Liftgate Module (LGM) |
| MINI 10A | F2 | (RR FOG) Tail Lamp Circuit Board – Left |
| MINI 10A | F4 | (TBC 3) Body Control Module (BCM) |
| MINI 10A | F5 | (TBC 2) Body Control Module (BCM) |
| MINI 15A | F6 | (RR WIPER) Rear Window Wiper Motor |
| MINI 10A | F7 | (DDM) Driver Door Module (DDM) |
| MINI 20A | F8 | (AMP) Audio Amplifier |
| MINI 20A | F9 | (PDM) Front Passenger Door Module (FPDM) |
| MINI 30A | F10 | (RR HVAC) 2006: Auxiliary Blower Motor, Blower Motor Control Processor – Auxiliary; 2007: Not Used |
| MINI 10A | F11 | (LR PARK) License Lamps, Tail Lamp Circuit Board – Left |
| MINI 10A | F12 | (VEH CHMSL) Center High Mounted Stop Lamp (CHMSL) |
| MINI 10A | F13 | (RR PARK) Clearance Lamps, Tail Lamp Circuit Board – Right |
| MINI 10A | F14 | (LGM/DSM) Cobra Intrusion Sensor Module, Inclination Sensor, Liftgate Module (LGM), Driver Memory Seat Module |
| MINI 10A | F17 | (LOCKS) LOCK Relay, UNLOCK Relay |
| MINI 10A | F21 | (OH BATT/ONSTAR) DVD Player, Garage Door Opener, Vehicle Communication Interface Module (CIM) |
| MINI 20A | F22 | (SUNROOF) Sunroof Motor |
| MINI 10A | F23 | (RAIN) 2006: Outside Moisture Sensor; 2007: Not Used |
| MINI 3A | F24 | (TBC ACC) Body Control Module (BCM) |
| MINI 25A | F25 | (FRT WPR) Windshield Wiper Motor |
| MINI 10A | F26 | (TCM) Transmission Control Module (TCM) |
| MINI 10A | F27 | (TBC 5) Body Control Module (BCM) |
| MINI 15A | F28 | (VEH STOP) Engine Control Module (ECM), Powertrain Control Module (PCM), Left/Right Tail Lamp Circuit Boards, Trailer Brake Wiring, Transmission Control Module (TCM) |
| MINI 10A | F29 | (HVAC B) HVAC Control Module, Auxiliary HVAC Control Module |
| MINI 10A | F30 | (F PARK) Marker Lamps, Park Lamps, Park/Turn Signal Lamps, Turn Signal/Multifunction Switch |
| MINI 10A | F31 | (LT TURN) Driver Door Module (DDM), Instrument Panel Cluster (IPC), Left Front Marker/Park/Turn Signal Lamps, Left Tail Lamp Circuit Board |
| MINI 10A | F32 | (HVAC I) Air Temperature Actuators, Console Mode Actuator – Auxiliary, Defrost Actuator, HVAC Control Modules, Mode Actuator, Recirculation Actuator, Steering Wheel Speed/Position Sensor, Turn Signal/Multifunction Switch |
| MINI 10A | F33 | (TBC 4) Body Control Module (BCM) |
| MINI 15A | F34 | (RADIO) Digital Radio Receiver, Radio |
| MINI 10A | F35 | (TR PARK) Trailer Connector |
| MINI 10A | F36 | (RT TURN) Front Passenger Door Module (FPDM), Instrument Panel Cluster (IPC), Right Front Marker/Park/Turn Signal Lamps, Right Tail Lamp Circuit Board |
| MINI 30A | F37 | (HVAC) HVAC Control Module |
| MINI 20A | F38 | (AUX PWR 1) Auxiliary Power Outlets |
| MINI 10A | F39 | (IGN 0) Automatic Transmission, Shift Lock Actuator, Engine Control Module (ECM), Powertrain Control Module (PCM), Theft Deterrent Control Module |
| MINI 15A | F40 | (4WD) Air Suspension Compressor Assembly, Auxiliary Water Pump Relay 1, Front Axle Actuator, Transfer Case Shift Control Switch |
| MINI 3A | F42 | (TBC IG) Body Control Module (BCM) |
| MINI 10A | F43 | (BRAKE) Electronic Brake Control Module (EBCM) |
| MINI 3A | F44 | (TBC RUN) Body Control Module (BCM) |
| Circuit Breaker ATO | F50 | (RT DOORS) Front Passenger Door Module (FPDM), Rear Right Window Switch |
| Circuit Breaker ATO | F51 | (LT DOORS) Driver Door Module (DDM), Rear Left Window Switch |
| Circuit Breaker ATO | F52 | (SEATS) Lumbar Adjuster Switches, Driver Memory Seat Module, Seat Adjuster Switches |
| Fuse Puller | FUSEPULLER | Extraction tool for fuse replacement |
| Relay | R1 | (LOCK) Rear Door Latch Assemblies |
| Relay | R2 | (UNLOCK) Rear Door Latch Assemblies |
| Relay | R3 | (RAP) Quarter Glass Switches, Sunroof Motor |
| Relay | R4 | (PARK LP) F PARK, LR PARK, RR PARK, TR PARK |
| Relay | R5 | (RR FOG LP) Rear Fog Lamps |
Isuzu Ascender(2006 & 2007)
| № | Name | A | Description |
|---|---|---|---|
| 1 | RT DOORS (Circuit Breaker) | 25 | Front Passenger Door Module (FPDM), Window Switch- RR |
| 2 | LT DOORS (Circuit Breaker) | 25 | Driver Door Module (DDM), Window Switch – LR |
| 3 | LGM #2 | 30 | Liftgate Module (LGM) |
| 4 | TBC 3 | 10 | Body Control Module (BCM) |
| 5 | RR FOG | 10 | Tail Lamp Circuit Board -Left |
| 6 | — | — | Not Used |
| 7 | TBC 2 | 10 | Body Control Module (BCM) |
| 8 | SEATS (Circuit Breaker) | 30 | Lumbar Adjuster Switches, Memory Seat Module – Driver, Seat Adjuster Switches |
| 9 | RR WIPER (Circuit Breaker) | 15 | Rear Window Wiper Motor |
| 10 | DDM | 10 | Driver Door Module (DDM) |
| 11 | AMP | 20 | Audio Amplifier |
| 12 | PDM | 20 | Front Passenger Door Module (FPDM) |
| 13 | RR HVAC | 30 | 2006: Blower Motor- Auxiliary, Blower Motor Control Processor – Auxiliary 2007: Not Used |
| 14 | LR PARK | 10 | License Lamps, Tail Lamp Circuit Board- Left |
| 15 | — | — | Not Used |
| 16 | VEH CHMSL | 10 | Center High Mounted Stop Lamp (CHMSL) |
| 17 | RR PARK | 10 | Clearance Lamps, Tail Lamp Circuit Board – Right |
| 18 | LOCK (Relay) | — | Rear Door Latch Assemblies |
| 19 | LGM/DSM | 10 | Cobra Intrusion Sensor Module, Inclination Sensor, Liftgate Module (LGM), Memory Seat Module- Driver |
| 21 | LOCKS | 10 | LOCK Relay, UNLOCK Relay |
| 22 | RAP (Relay) | — | Quarter Glass Switches, Sunroof Motor |
| 23 | — | — | Not Used |
| 24 | UNLOCK (Relay) | — | Rear Door Latch Assemblies |
| 25 | — | — | Not Used |
| 26 | — | — | Not Used |
| 27 | OH BATT/ONSTAR | 10 | Digital Video Disc (DVD) Player, Garage Door Opener, Vehicle Communication Interface Module (CIM) |
| 28 | SUNROOF | 20 | Sunroof Motor |
| 29 | RAIN | 10 | 2006: Outside Moisture Sensor 2007: Not Used |
| 30 | PARK LP (Relay) | — | F PARK, LR PARK. RR PARK, TR PARK |
| 31 | TBC ACC | 3 | Body Control Module (BCM) |
| 32 | TBC 5 | 10 | Body Control Module (BCM) |
| 33 | FRT WPR | 25 | Windshield Wiper Motor |
| 34 | VEH STOP | 15 | Engine Control Module (ECM), Powertrain Control Module (PCM), Tail Lamp Circuit Board -Left/Right, Trailer Brake Wiring, Transmission Control Module (TCM) |
| 35 | TCM | 10 | Transmission Control Module (TCM) |
| 36 | HVAC B | 10 | HVAC Control Module, HVAC Control Module -Auxiliary |
| 37 | F PARK | 10 | Marker Lamps, Park Lamps, Park/Turn Signal Lamps, Turn Signal/Multifunction Switch |
| 38 | LT TURN | 10 | Driver Door Module (DDM), Instrument Panel Cluster (I PC), Marker Lamp, Park/Turn Signal Lamp- LF, Tail Lamp Circuit Board- Left, Turn Signal Lamp – LF |
| 39 | HVAC I | 10 | Air Temperature Actuators, Console Mode Actuator- Auxiliary, Defrost Actuator, HVAC Control Module, HVAC Control Module- Auxiliary, Mode Actuator, Recirculation Actuator, Steering Wheel Speed/Position Sensor, Turn Signal/Multifunction Switch |
| 40 | TBC 4 | 10 | Body Control Module (BCM) |
| 41 | RADIO | 15 | Digital Radio Receiver, Radio |
| 42 | TR PARK | 10 | Trailer Connector |
| 43 | RT TURN | 10 | Front Passenger Door Module (FPDM), Instrument Panel Cluster (IPC), Marker Lamp- RF, Park/Turn Signal Lamp- RF, Tail Lamp Circuit Board- Right, Turn Signal Lamp- RF |
| 44 | HVAC | 30 | HVAC Control Module |
| 45 | RR FOG LP (Relay) | — | RR FOG |
| 46 | AUX PWR 1 | 20 | Auxiliary Power Outlets |
| 47 | IGN 0 | 10 | Automatic Transmission, Automatic Transmission Shift Lock Actuator, Engine Control Module (ECM). Powertrain Control Module (PCM), Theft Deterrent Control Module |
| 48 | 4WD | 15 | Air Suspension Compressor Assembly, Auxiliary Water Pump Relay 1, Front Axle Actuator, Transfer Case Shift Control Switch |
| 49 | — | — | Not Used |
| 50 | TBC IG | 3 | Body Control Module (BCM) |
| 51 | BRAKE | 10 | Electronic Brake Control Module (EBCM) |
| 52 | TBC RUN | 3 | Body Control Module (BCM) |
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