Half of one of the trailer's LED brake/signal light is out

Bad LED's...I just had the same problem with 3 yrs old Bargman....I bought their replacement LED light module....easy to replace..take out 2 screws to pull module off and snip 3 wires ...crimp connect new unit wires on and remount. ....if it is a retrofit unit that replaced 1156 bulbs, then even easier to replace as no wire snipping involved. An 1156 bulb base comes attached to module wires...Take the faulty module out to check which kind before buying new one.