Paccar MX ECM Jumper Harnesses for Bench Testing

Bench-testing PACCAR ECMs off the truck is a critical step in engine conversions or repowers—verifying function early prevents install issues, codes, or downtime when upgrading to or integrating a PACCAR MX engine. Kustom Truck Parts' Paccar ECM jumper harnesses (specifically for MX engines) pair directly with our base bench harness, providing the precise pinout matching needed for accurate diagnostics, programming, and testing. Our Paccar Jumper support EPA10 and newer ECM electronics. 

Browse below for the Paccar MX ECM jumper harness that fits your project. Pair with our base bench harness and battery jumper for a complete testing setup. Unsure about EPA compatibility or pin needs for your MX conversion? Contact our team—we're here to help.