Cummins Wiring Harness | eBay Forsale is a used OEM Dodge Cummins engine/ ecm wiring harness pulled from a running driving 2003 Dodge Cummins 2500 4x4 with a 48re automatic cummins ecm harness | eBay Find great deals on eBay for cummins ecm harness. Shop with confidence. Skip to main content. eBay Logo: 2003 Dodge Ram 2500 3500 Engine ECM Wire Harness Cummins 3957295 See more like this. ECM ECU Engine Wiring Harness 2001 24 Valve Dodge Ram Cummins Diesel Automatic. Pre-Owned. $249. From Canada.