I have owned many trailers and have three now.
Over the years keeping all the lights going has been a task equivalent to cracking the enigma code.
Wifey often uses my trailer light experiences to say “Men must have designed trailer lights”.
Fortunately I have found salvation in my current set up.
My WalMart or Amazon (Blaze brand?) LED’s, with a healthy amount of black RTV sealant mushed into and around the wire entry point, have been illuminating things for a few years now.
Now wifey can comment on why men must modify brand new motorcycles…