Originally Posted by Dan@LED4RV
The question is, is the circuit that your lights are on, have a common ground. Most Airstream units (2010 and before) are grounded via the frame, for some of the 12 volt
system. LEDs require a isolated circuit.
There are some slider style/rocker switches dimmers out there that are PWM (Pulse Width Modulation) dimmers, but if your unit is not wired with a isolated circuit it won't do you any good. We do not carry the slider style dimmers because of the price.
Thanks again to you all. Here's some additional info and some pictures that may help. Our rig (2010 27FB) must have been upgraded to LED overheads (Dan, you can probably tell by looking at picture #1), but it does have LED lights everywhere else too, both interior and exterior. That may be the good news?
I included pictures of the reverse side of the entry and BR rockers so maybe someone experienced can comment on the wiring. The living area is controlled by a three way set-up with three yellow wires to both the entry rocker (picture #2) and the BR rocker (picture #3). The BR lights are controlled by the rocker via the two purple wires in picture #3. Appreciate your comments and suggestions.