The 2003 Isuzu Ascender is a full-size SUV truck designed for families and individuals requiring significant towing and cargo capacity. Built on the versatile GM GMT360 platform, it shares its underpinnings with other notable GM SUVs, offering a blend of familiar engineering with Isuzu's market presence. This model was equipped with powerful engine options, including GM's 4.2L Atlas inline-six and the 5.3L Vortec V8, providing robust performance for both daily driving and demanding tasks. Its spacious interior and robust construction made it a competitive choice in a segment that included established players like the Chevrolet Tahoe and Ford Expedition.
This ISUZU SUV TRUCK 2003 ASCENDER ELECTRICAL WIRING MANUAL provides comprehensive coverage of the vehicle's electrical systems. It is intended for owners, mechanics, and technicians seeking detailed information for maintenance, diagnosis, and repair. The manual covers a wide array of systems, including power distribution, charging and starting, ignition, engine and transmission controls, ABS, lighting, HVAC, and various body electrical functions. Detailed troubleshooting guides, component locations, connector views, wiring harness diagrams, and ground distribution schematics are included to facilitate accurate and efficient service.
ISUZU SUV TRUCK 2003 ASCENDER ELECTRCAL WIRING MANUAL
Air conditioner
Automatic
Manual
Anti–lock brake system (ABS)
Anti–theft system
Audible warning system
Automatic transmission controls
Auxiliary power outlets
Back–up lights
Blower Controls
Automatic
Manual
Body control module sytem
Brake lights
Charging system
Cigar lighter
Cruise control
4.2L
5.3L
Dash and console lights
Data lines
Day–night mirror
Door control module system
Engine controls
4.2L
5.3L
Engine cooling fans
Gauges
Ground distribution
Harness connector views
Headlights and fog lights
Homelink system
Horns
Ignition system
4.2L
5.3L
Indicators and Driver Information
Center (DIC)
Interior lights
Liftgate module system
Memory seats
OnStar system
Park, turn/hazard, marker and
license lamps
Power distribution
Power door locks
Power mirrors
Power seats
Power windows
Rear defogger
Rear wiper/washer
Shift lock control system
Sound system
Starting system
Sunroof
Supplemental restraint (SRS)
Trailer wiring
Transfer case control
Travelnote
Windshield wiper/washer:
variable intermittent
ISUZU SUV TRUCK 2003 ASCENDER ELECTRCAL WIRING MANUAL
Air conditioner
Automatic
Manual
Anti–lock brake system (ABS)
Anti–theft system
Audible warning system
Automatic transmission controls
Auxiliary power outlets
Back–up lights
Blower Controls
Automatic
Manual
Body control module sytem
Brake lights
Charging system
Cigar lighter
Cruise control
4.2L
5.3L
Dash and console lights
Data lines
Day–night mirror
Door control module system
Engine controls
4.2L
5.3L
Engine cooling fans
Gauges
Ground distribution
Harness connector views
Headlights and fog lights
Homelink system
Horns
Ignition system
4.2L
5.3L
Indicators and Driver Information
Center (DIC)
Interior lights
Liftgate module system
Memory seats
OnStar system
Park, turn/hazard, marker and
license lamps
Power distribution
Power door locks
Power mirrors
Power seats
Power windows
Rear defogger
Rear wiper/washer
Shift lock control system
Sound system
Starting system
Sunroof
Supplemental restraint (SRS)
Trailer wiring
Transfer case control
Travelnote
Windshield wiper/washer:
variable intermittent
