Detroit Diesel GHG14 DD15 & DD16 MCM 2.1 Engine Harness Wiring Schematic

This wiring reference for the Detroit Diesel GHG14 DD15 & DD16 MCM 2.1 Engine Harness Wiring Schematic helps you follow circuits, connectors and harnesses when you are diagnosing an electrical problem or checking a repair.

Document reference: DDC-SVC-OTH-0059.

What the diagrams cover

• MCM2.1 connector pinouts
• Engine harness wiring - sensors, injectors, actuators

Coverage

DD15 / DD16.

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. Read it on any device. The file opens in standard PDF readers on Windows, Mac, Android and iOS. Keep a backup copy so you always have it.
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.

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