Engine installation harness for installing a Cummins ISC or ISL9 engine (CM2250 engine electronics) into a Pre-NAMUX 2004-2005 Peterbilt 335 model truck with Cummins ISL chassis electronics.
NOTE: This harness is only compatible with a Cummins ISL based Peterbilt Pre-NAMUX (analog) electronics chassis. 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.
Peterbilt 335 MEDIUM DUTY ONLY