The FIRST thing I would do is, Connect a 10 amp fuse to the RED brake light wire at the trailer junction box where the 7 wire Trailer cord connects to the trailer tow wiring. For a Module to blow, there must be either an overload or a short, IN THE TRAILER, since your Kayak trailer does not have the problem. The short is obviously caused by the movement of the trailer. The shorted wire shorts when the trailer moves and twists. Installing that 10 amp fuse will cause the fuse to blow instead of the Module. IF you find the fuse blown, your modeule is protected and you KNOW where to start troubleshooting on the trailer. IF you have LED rear lights on the trailer use a 5 amp Fuse. Doug