Originally Posted by z28
Just replaced the main battery used to start the engine in my 2018 THIR ACE and now the radio in the dash is inop, no display or sounds. Looking for suggestions on where to begin. performing a diagnosis
Well is your use/store switch on......maybe something changed with newer coaches, but usually dash radios are powered from House batteries not Coach battery. If there is power to the radio then try some of the other common reset techniques.