Quote:
Originally Posted by Lt Keefer
The USB port on the radio is for input to the radio. You can use it to update the firmware of the unit or play tunes from a stick. The USB port on the dash is for charging devices. On my coach the dash USB has nothing to do with the radio. It is only a power outlet. Knowing Thor, they probably wired something wrong.
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I know that many of these displays have such a connection. You described it as "under the dash". If it is in a dash mounted bracket or receptacle then my comment does not necessarily apply. Typically the connection I described should be a dangling connection.
The symptoms you described would be what I would expect if you plugged into the software update connection