Crimp Resistance Drift: The 3.2 Milliohm Change That Causes 100 mV Ground Offset in J1939 Harnesses
In April 2024, a concrete pump OEM sent us a boom harness from a machine with 1,860 hours on the clock. The dealer had already replaced the ECU twice under warranty. The fault appeared only when the boom passed 72 degrees of elevation and the pump was under load. No fault codes. No stored errors. […]