All LED lights are NOT designed to dim. You can't just put a cheap dimmer on these to dim them. LED's have a control circuit between them and the line voltage much like a ballast for fluorescent lighting which you can't dim either unless it is ballast designed to dim.
I would check with Jayco to see if the LED's used are able to be dimmed or not. Otherwise you won't do them any good.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof