The wire is in the wall, usually the wall closest to the hallway entry to the bedroom. You will NOT get any help from Jayco. As a Tech for a Jayco dealer(26 years), we have tried numerous times over the years to verify and find that Tstat wire. Jayco would tell us they are not sure. BUT, If you have a prewire for the bedroom TV Coax, it was usually installed in that wall panel. Unlike sheetrock, you can gently pop the wall panel staples out and pull the floor to ceiling wood panel out enough to find and locate the wire harness. THIS WILL NOT BE LOCATED ON THE OUTER OR REAR INTERIOR SIDEWALLS. Only on walls built between the outer sidewalls. Doug