hi all, I have a 2008 van 3500 series 6.0 22,000 miles its a motorhome. the gauges go crazy lights in the dash go on and off and then it goes quiet and all gauges except the volt gauge go off. no air no cruise no tow haul. and now when I hit the key the starter wont spin the motor over. so it wont crank. I jumped the wires at the starter with key on and starter will spin the engine over but still wont fire up. now if the starter will spin by jumping the wires its probably not a ground issue is it ? I also cleaned and inspected all the ground wires at the frame and battery. any help would be appreciated thanks

 

the van had a bad ECM cost $725.00 at dealer.