Joe, in my first trailer I had a similar issue with the battery not showing charged on the monitor panel. I tested the battery with a multi meter and like yours the battery was full. I then removed the monitor panel and tested the voltage there and saw it was different, so I knew I was loosing voltage somewhere in between. start at the battery and work your way to each connection until you find the drop in voltage, my guess is you wont have very far to go. My problem was at the first connection. The battery goes thru a thermal self resetting breaker bolted to the trailer frame. one side was good, and the other side had a drop in voltage. took the rubber boot off it and it was corroded. went to remove it and it fell apart from corrosion. replaced the breaker and monitor panel read full again.
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Jason & Wendy
2014 Ford F-350 Lariat 6.7L PSD
2015 Keystone Montana 3711FL
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