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Replaced pcm no buss still lit

MikerobertMikerobert Member Posts: 3
edited March 2019 in Dodge
Couple months ago I replace the crankshaft and camshaft sensors. And truck has been running beautiful. One morning I came out to start it and no bus was let truck crank but would not turn over. No power was coming out of the PCM. Replaced the PCM and the truck runs mint but I still have no bus light on the dash....HELP!!!!

Comments

  • MikerobertMikerobert Member Posts: 3
    *UPDATE* I checked all sensors then reseated all 3 harnesses into ecm and everything works. I believe it was a loose connection from harness to ecm. All clips are broke from age so a lil super glue shpuld work
  • thecardoc3thecardoc3 Member Posts: 5,701
    I would advise against super gluing the connectors.

    Using a DVOM (digital volt/ohmmeter) what voltage do you measure at pin 38 of connector #1 Violet/White wire at the PCM? Switching to frequency what do you see?

    Compare those measurements to Pin 2 of the data link connector.
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