Hey everyone, so picked up a slightly used s595 (300hrs). throwing a m3404 code which is deluxe panel communication issue, and the travel/high speed isn’t working. checked the harness throughout the cab, under the cab, pulled connectors dielectric greased them etc..... all the somewhat easy stuff. Any other things I should be checking or anyone else have this combo of issues. not sure if the 2speed issue is related or not. But does nothing when the button is pressed. Not sure where the unit came from may have been rental have herd of some rental places disconnecting the travel speed. Any clue as to where to look for something like this unplugged etc.
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