Hi all!
We have a Jayco 27RLS and are 90% pleased. We've had shower door issues but solved that with a curtain. Recently we had a brake/tail light stop working. Then our brake controller started flashing "SH" (short in brake electric line.)
I had to drop most of the under shroud and found Jayco had not shielded or tied down the wires running the length of the trailer. The wires were rubbing on frame cross members and finally shorted out the brake/taillight. Other wires were on the way to a short also. I repaired the wires and taped and tied down the wiring harnesses.
I also found the brake wires to the brake magnets coming out of the axles were also rubbing and one had shorted out.
You may want to check your brake magnet wires and I hope you never have to drop the under shroud. It's a !%$#^ to get back on. I probably would have cut it if Jayco supplied any accurate wiring diagrams....
Safe and hopefully carefree travels to all.