Caterpillar ECM Jumper Harnesses

Bench-testing Caterpillar ECMs off the truck is essential during engine conversions or swaps—verifying module function early avoids install headaches, codes, or downtime from faulty electronics. Kustom Truck Parts' Caterpillar ECM jumper harnesses pair directly with our base bench harness, delivering the precise pin configuration needed for accurate diagnostics on ADEM generations.  We support the 40-Pin ADEM2 and 70-Pin ADEM2000/3/4 generation of ECM electronics.

These jumpers ensure reliable power/signal connections for safe bench testing—ideal when installing a Cat engine and wanting to confirm programming and proper configuration before installing the engine into the chassis.

Browse below for the right jumper match for your ECM generation. Pair with our base bench harness and battery jumper for a complete testing setup. Unsure about ADEM compatibility or pin needs for your conversion? Contact our team—we're here to help.