Hi Bob! Welcome to IRV2! We're sure glad you joined the gang!
I wonder if there is a common ground for the dash area and that it has a poor connection? Maybe someone has a wiring diagram for your rig and can verify that.
Good luck, happy trails, and God bless!
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Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD