Detroit ECM Jumper Harnesses

Bench-testing Detroit Diesel ECMs off the truck is a critical step in conversions or repowers—verifying communication and function early prevents codes, failures, or costly rework after installation. Kustom Truck Parts' Detroit ECM jumper harnesses pair directly with our base bench harness, providing the precise wiring for Detroit-specific ECM connections across key DDEC generations. We support Series 60 (DDEC3/4 & DDEC5) and DD Platform Detroit engines. 

These precision jumpers ensure reliable power/signal connections for accurate off-vehicle diagnostics—ideal when installing a Detroit Series 60 or DD-series engine and need to confirm programming and proper configuration before installing the engine into the chassis.

Browse below for the jumper that matches your DDEC generation or engine model. Pair with our base bench harness and battery jumper for a complete testing setup. Unsure about DDEC compatibility or which jumper fits your conversion? Contact our team—we're here to help.