Trailer brakes issues

Gdetrailer, my truck is basically new off the lot, i waited the required 800km (500 miles) to tow, and same problem...i stopped by the storage lot on the way home and noticed the same trailer parked a few spots over, so i backed up and plugged in (i asked permission first from security) and had no issues so IT'S for sure my trailer, which i suspected all along anyways...i always planned to re wire anyways (and trust me here it is not something i cant handle), i am trying to gather as much info as i can before i tackle this (i dont think will take to long anyways). If it doesnt solve the problem i will try paralleling another set of mags ( which i do believe is hoaky as you stated, but i'd rather have brakes than no brakes), in a side note, wouldnt it be cheaper and more effective to simply put a resistor in parallel versus mags, just a thought (a load is a load)