Our keyless door entry started with a peeping noise a few weeks ago while closing the RV entry door, and eventually stopped working altogether. Since it never did that before we first thought it might be a battery going south, and hijacked another forum battery related threat(long story). The door on our Isata 5 30FW is hardwired and has no external contact points, as some do. Today we finally got a very busy mobile repair shop to help us. Beforehand, we talked to the door manufacturer and Trimark, the keypad manufacturer, and they were extremely helpful pointing us towards isolating the possible cause. Kudos to Dynamax for providing the detailed supplier sheets.
What we found might trigger another Kaizen event at Dynamax, as the cause of the failure is small and preventable.
Basically the 2 12 Volt wires are wedged into the door jam and inside of the door which allows no flex or movement while opening and closing the door, and subsequently the 2 wires completely broke off. The repair should have been pulling new wires but we could not do so since disassembling the door jam and the door inside panel to allow for more room for the wires to move freely was impossible. We ended up splicing in 2 wires inside the door exposed conduit. It fixed the issue, and the wife is happy being able to use our great Keyless entry door again.
In case you have the same door assembly you might want to remove the black inside door panel and the exposed conduit and see if you have free wire movement, while opening and closing the door, to prevent the same PITA failure.
Attached are the pictures of what we found. Hope this helps.