Testing the ECM for power - do I have this right? - YotaTech ForumsECU Wiring Harnesses | TorquedSplitting The ECM Wiring HarnessNeed to Test ECM Wiring Harness to Find a Possible Break2G - Ecu harness wiring, grounds | DSMtunersSplicing Into The ECM HarnessDo you have a schematic showing how the harness runs and location ofViewing a thread - Best fix..Broken bolt on ECM wiring harness.