Cummins ISB (4-Cylinder), ISBe (4 & 6-Cylinder) Wiring Diagram

Electrical faults are much easier to trace with the right diagram in front of you. This is the wiring diagram / electrical schematic document for the Cummins ISB (4-Cylinder), ISBe (4 & 6-Cylinder).

What the diagrams cover

• ECM connector pinouts
• Sensor and actuator wiring
• Fuel system wiring
• Harness routing and connector views

Models covered

• ISB (4-cyl)
• ISBe (4 & 6-cyl)

User help

1. Make sure it matches your machine. Look up your model and serial number and compare them with the coverage above. Not sure? Send us those details and we will help you check before you buy.
2. Get the file. This is a digital PDF download. Nothing is shipped, so you can start using it as soon as you have the file.
3. Open it anywhere. Use any current PDF reader (Adobe Acrobat Reader, your browser, or a phone or tablet app). Save a copy to your computer and to a backup drive.
4. Jump straight to the section you need. Start from the table of contents or search for a part name, fault code or value, then print just those pages for the workshop.
5. Trace circuits methodically. Identify the circuit, connector or harness in the diagram, then check voltage, continuity and grounds at the points shown before replacing components.
6. Stay safe. Repairs on engines, hydraulics, fuel and electrical systems can be dangerous. Follow the safety instructions in the document, use proper tools and support equipment, and follow local regulations.

Cummins and all model names are trademarks of their respective owners and are used here only to identify compatibility. This store is an independent seller and is not affiliated with or endorsed by Cummins. For informational and maintenance use.