2011 Ford F-150 - SuperCrew cab, 5 6" short bed, with towing mirrors - Weathershield HP Car Cover "light bulb right turn signal" Questions

...light bulb and a back up bulb. Make sure both are working. Take outside panel of to check the bulb and the wiring. If both are good. Make sure you check for mois Don't forget the turn signal switch. ...

...light on the roof works and my turn signal work but that's it. I recently had work done to repair damage on the right rear quarter panel could they have unplugged something? possibly dont know model ...