Engine installation harness for installing a Cummins ISX engine (CM2250 engine electronics) into a Peterbilt 387 truck with NAMUX1 chassis electronics and Caterpillar 70 Pin ADEM4 engine electronics.
NOTE: This harness is only compatible with Caterpillar based Peterbilt NAMUX1 chassis electronic. NAMUX1 electronics are typically found on 2008-2009 year model Peterbilt 387 heavy duty class 8 trucks. If you are uncertain of your exact chassis electronics please call for fitment confirmation.
Peterbilt uses many variations of chassis emission harness connectors on the factory chassis harness. With that said, the emission harness breakout connectors on this engine harness may or may not match directly to the connectors on the chassis. However, the harness will include a pinout sheet for the emission connector breakouts that provides the required information for you to match up to any existing or additional chassis emission connections required.
