1990 Western Star Truck Wiring Diagram



Covers: 1990 Western Star trucks
Pages: 192
Format: PDF
File size: 43mb
Compatible with: Windows/Mac/Tablet
Notes: High resolution diagram/schematic download

The 1990 Western Star Truck Wiring Diagram provides OEM information for troubleshooting the electrical system. Over 190 pages of information are included, which cover electrical component locations, connectors, pinouts, schematics, basic troubleshooting and more.

This manual covers vehicles built after September 1989.

Diagrams/schematics included:

  • Anti Lock Brakes
  • Accessory
  • Air Dryer
  • Alternator
  • Ammeter
  • Atec
  • Axle
  • Battery
  • Beacon
  • Back-up Lamp
  • CB Radio
  • Cruise Control
  • Cigarette Lighter
  • Coolant Level Sensor
  • Defrost Fan
  • Driving Lamp
  • Engine Brake
  • Elite Suite
  • Engine Shut-down
  • Engine Warning
  • Fog Lamp
  • Fuel Heater
  • Fuel Level
  • Ground
  • Gauges
  • Headlamp
  • Horn
  • Heater and Air Conditioning
  • Idle Control
  • Ignition
  • Interior Cab Lamp
  • Interior Sleeper Lamp
  • Lighted Toggle Switch
  • Marker Lamp
  • Mirrors
  • Cat PEEC Controls
  • Panel Lamp
  • Power Distribution
  • Radio/clock
  • Stop Lamp
  • Starter 12V/24V
  • Southwind Hot Box Preheater
  • Tail Lamp
  • Transmission
  • Turn Signal
  • Webasto
  • Wiper/washer
  • Connector Codes
  • Wire Codes

Example schematic:

Cummins wiring diagram example


How does this work?

It’s simple – after purchasing a schematic through our secure checkout, a download link will be sent to the email address you specify at checkout. You have up to 90 days to retrieve and save the files. Once the file is saved to your computer, it is yours for good.

How do I view the schematic?

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Can you send me a printed version?

We sell downloadable schematics only, however they can be printed by your local print shop.

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