The main switch panel in my Cougar is : from left to right : Front scare light, Rear scare light, Porch light, Living-room ceiling lights. But I doubt that Keystone wires any two trailers the same.
You will have to keep trying different switches. Good luck, Hank ......... Also check your fuse panel to see if any of the red LEDs are lit. (Blown fuses)
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Hank & Lynn
2007 Cougar 290RKS, E-Z Flex, 16" XPS RIBs ( SOLD
.. Gonna miss her ... looking for new 5r)
2004.5 Dodge 2500 QC, LB, 5.9HO, WestTach gauges, Ride-Rite