Allison TCM Jumper Harnesses

An Allison TCM jumper harness is a critical tool for testing, programming, and diagnosing Allison transmissions outside the vehicle. These Allison TCM jumper harnesses allow technicians and builders to connect the transmission control module to power and diagnostic equipment without a full vehicle harness.

Commonly used during engine and transmission conversions, they streamline setup and troubleshooting while reducing downtime. Built for accuracy and durability, these jumper harnesses are ideal for diesel shops, rebuilders, and performance specialists who need reliable bench-testing solutions.