John & Angela wrote:
Where would you recommend checking for the ground.
ECM case to engine block. Yes it is mounted directly to the engine block, but our was loose, and did not make ground, and gave us the same symptoms (light and no power) Cummins dealer and service shop said the ECM was bad, because the reader said the ECM had an internal failure. but when you wiggled it the code reader would give different codes as if it were normal. I removed it, cleaned it, and replaced it using star washers under the mount pads and we have had no more problems.
