Engine installation harness for installing a Caterpillar 40 pin engine (ADEM2 engine electronics) into a Pre-NAMUX 1999-2003 Peterbilt truck with Detroit DDEC3 or DDEC4 chassis electronics.
NOTE: This harness is only compatible with a Detroit DDEC3 or DDEC4 based Peterbilt Pre-NAMUX (analog) chassis. If you are uncertain of your exact chassis electronics please call for fitment confirmation.
