2004 Chrysler Sebring Sedan 2.4.155,000 miles. Hit a small bump in road and started losing all guages and speedometer and tack with warning lights going off and on every bump in road.. Car still runs ok. Below gear indicater (PRND31} shows "no bus". Have had some grounding issues with lights and windshield wipers. Not sure if it's grounding problem or cluster went bad.

 

Maybe check everything is tight and clean on battery terminals.

 

Cleaned all the Grounds on Left fender well under. Master cylinder Cleaned all negative grounds on battery and body. got a used Cluster off ebay same results.Gauges work on and off. Tried to hook up Scantool and it said could not connect with car. Is the ECM bad. Car runs fine.

 

sounds like it. I'd try another scanner first for sure. I have a hard time getting mine to work in my same car. I turn the ignition ahead and then plug it in . I no that your not supposed too do it that way but that's the only way I can get mine to work.