Peterbilt 387 Engine Harness Wiring Diagram (Cummins ISX & Signature Engines w/ CM870 Controller)

This is a four (4) page wiring diagram for use with Model 387 Peterbilt Truck with Cummins ISX and Signature Series Engines, with CM870 Controller.

• Shows all connectors with names, connector numbers, curcuit numbers, and connector locations. 
• Shows "from and to" components, wire colors, component wire connects to, terminal locations, wire guage, insulation type.
• Shows connector end views with pins identified.