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 2008-2010 year model Peterbilt 387 heavy duty class 8 trucks. If you are uncertain of your exact chassis electronics please call for fitment confirmation.
