There are a few possibilities as to why only one side of your Thomas Payne Momentum RV Dual Reclining Sofa is acting up (or not acting up at all in your case).
There are 3 components that allow the recliner to operate the lights, massage, and heater. These are the Cup Holder # 195-387597, Control Box # 195-387596, and the 12V Power Cord # 195-387595. To determine which of these components needs to be replaced simply try using parts from the side that is working.
Start off by swapping... view full answer...
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