Not sure if your lens in missing or broken. If missing look on top of your slide out room when the room is in the retracted position. When they fall off due to highway earthquakes they often end up on top of the rooms.
Chris & Maria
2012 36RL, Full Body Paint, Dual Awning, Dual a/c, Splendide Combo, Fisher Paykel dishwasher, 6.5kW Onan, Goodyear G614's. 2015 F550 6.7l, 4X4, Lariat, CC, 176" WB, Long Box, B&W Companion