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No Bus question

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I have been getting an intermittent no bus message since July or so. It had went away until my hunting trip last week. When it happens I of course lose all my gauges, but I can pick them up on my ScanGage2 through the OBD port. It seemed to happen on rough road so out of curiousity I tapped, or more like punched :mad: the cluster and everything came back up. This happened a few times. Since I can read speed, tach, etc. through the OBD port when the dash goes blank is it safe to assume that the problem is a loose cluster? Just trying to narrow it down before I start the long drawn out testing process.

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  • Mopar1973Man
    Mopar1973Man

    http://dodgeram.info/tsb/2000/08-05-00.htm   Found...

  • 01cummins4ever
    01cummins4ever

    I had similar situation a few years ago, turned out that it was the main plug in the PDC was loose, I just had to re set it, but be carefull when checking it is easy to over torque. Just got to do it

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I had similar situation a few years ago, turned out that it was the main plug in the PDC was loose, I just had to re set it, but be carefull when checking it is easy to over torque. Just got to do it by feel.

D393FBA6-8475-49CB-94E1-FE710D6BFAEE.jpeg

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    1 hour ago, Mopar1973Man said:

    Yeah I'm going to bet loose cluster. I'm pretty sure there was a TSB for cluster related no bus issue too.

    Any idea what the fix was? I'm gonna make sure the screws are tight but if it's a bad connection I don't know what to do.

    Take the fours screws out that hold the cluster in  and just unplug it by pulling straight out. You can then see the connectors. 2 will be in the dash and mate with the 2 in the cluster. 

    • Author

    Gotcha. I've been there already. But what to do if those connections are loose?

    I would think you just check and be sure the connections are not dirty or corroded and the dash mounts are secure. It would be nice to see a TSB on the issue to know what the problem might be.

    • Author

    Maybe apply a little chicken grease? Sorry.

     

    I seem to remember over the years a place where TSB's were listed for our trucks. Was that on this site or somewhere else? Or was I just dreaming again?

    • Author

    gAhhh, Geno's. I keep forgetting them. 1.3 hrs and done. Barely enough time for 3 beers :lmao:

    A few years back I was getting the "no bus" issue on my 01. I had found a lot of bus issues were related to loose cluster in Chrysler vehicles so out of curiosity I pulled the cluster to inspect and found nothing out of the ordinary. I reinstalled the cluster and haven't had any bus issues since. All I can figure was a loose electrical connection to the cluster before removing it. 

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