Isuzu Ascender (2003-2008) fuses and relay


The midsize SUV Isuzu Ascender was produced from 2003 to 2008. In this article, you will find fuse box diagrams of Isuzu Ascender 2006 and 2007, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse Layout Isuzu Ascender 2003-2008


Information from the owner’s manuals of 2006 and 2007 is used. The location and function of fuses in cars produced at other times may differ.
See Chevrolet TrailBlazer (2002-2009), perhaps there is more complete information.

Cigar lighter (power outlet) fuses in the Isuzu Ascender are the fuse #13 (“LTR” – Cigar Lighter) in the Engine Compartment Fuse Box, and fuse #46 (“AUX PWR 1” – Auxiliary Power Outlets) in the Rear Underseat Fuse Box.

Engine Compartment Fuse Box

Fuse Box Location

It is located in the engine compartment on the driver’s side, under two covers.The location of the fuses in the engine compartment: Isuzu Ascender (2003-2008)

Fuse box diagram

Under-hood fuse box diagram: Isuzu Ascender (2006, 2007)


Assignment of the fuses and relay in the Engine Compartment (4.2L, 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
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)
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
44 A/C (Relay) A/C Compressor Clutch Assembly
45 FAN (Relay) Cooling Fan
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

Rear Underseat Fuse Box

Fuse Box Location

The fuse box is located under of the left rear seat, under two covers.The location of the fuses in the passenger compartment: Isuzu Ascender (2003-2008)

Fuse box diagram

Interior fuse box diagram: Isuzu Ascender (2006, 2007)

Assignment of the fuses in the Rear Underseat Fuse Box (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
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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