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2008megacabdually

no bus in odometer speedo and tach at 0 all lights in dash on

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2008 dodge 3500 6.7 4x4 deleted with efi live sometimes it won't start if it does start about 1 minute later all the lights in the dash will come on the tach and speedo will go to 0 and the odometer will say no bus. AnY ideas on how to fix it. Thanks in advance

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There is a big connector on the firewall just above the engine on the drivers side. It will have a black plastic cover with a bolt running through it. Try tightening that and see what happens.

Edited by mopartechnician

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Just make sure the wires are seated in the plug properly when you are done.

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Ok sorry to take so long to get back with you. Plug with screw in it taken off sprayed diode cleaner in connection then added diode grease put back together and made sure it was snug. New altenator as of yesterday. And is still doing the same thing. Going to crawl under it in a little bit take the plugs of the emc and do the same thing to them and see what happens

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