Welcome to the Newmar forum and irv2.
Its hard to say which module Newmar use from which MFG but heres a LINK
to many manufacturer's.
Before I would start looking for that have you pulled your dash panel near the control switch and check for any loose plugs or wiring spade clips on back of your light controls.
Lost my heater fan control while traveling down to Florida from Nappanee and when I stopped pulled the dash panel and found a heavy 6 wire plug had fallen off the male spade clips of heater switch. Coach is 7 years old and this is first time this has happened. Road vibration and bumps had finally loosened the plug.
Its difficult to get plugs back on pins because all the wire harness's are tied tight without much slack.
If you have checked your wiring behind dash than a call to Newmar may help you find correct part number of light module they would need your coach build number.