marker and tail lights out.

[ineedanap]

I towed my 2016 21BHS in the rain for the first time today.  Well...it made it a whole 5 miles before the marker, license plate, and running lights stopped working.  The only thing that lights up is the brake lights. 

It's not the tow vehicle.  I hooked up my motorcycle trailer to and everything works on that one.

I'm leaving for a camping trip saturday morning so I don't have time to have the dealer look at it.  I plan on getting out the multimeter tomorrow evening.  Where should I start looking?  Is this a common issue? 

[PYG RYDR]

Check the black panel connection box on the tongue.  Mine had a loose connection.  And the box was broken.  Both repaired under warranty.

[Sakigjiwa]

I'm glad to read this very useful.