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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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    Welcome To Mopar1973Man.Com LLC

    We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.