ELECTRIC GARAGE BEDS IN TOYHAULER

I own a 2007 Keystone Raptor Toyhauler.  In the garage, there are two queen beds that move down from the ceiling when a rocker switch is activated.  These are very common beds in many different toyhaulers.

My problem is that they have stopped functioning.  they were dead at half-way for a while.  Then I could tweak them an inch or two a couple times after that.  Now when I operate the switch, they are stone cold dead.  At least I was able to get them up just over head high before they died altogether.

Anyone have any experience troubleshooting these?  It is not a fuse or breaker.  I pulled the garage mounted switch from the wall mounting and don't seem to be registering any power to the switch as far as I can tell in either AC or DC volts.

Help!