surge brakes help

[leechlake]

I have a shorelandr trailer with surge brakes. I have the proper 5 prong wiring so when I back it's supposed to override the brakes. About 1/2 the time when I back the brakes lock up and I have to go and manually lock the brakes. Any ideas or tips. I'm having nighmares of not being able to back it into the lake on opening day.

[IFallsRon]

I never back into the lake with the lights plugged in.

[ccarlson]

With the system he is referring to, you need to leave the lights plugged in so the 5th wire can override the surge brakes.
But, I too have had problems occasionally with my similar system. I find that it only happens when the wiring or the overide switch get wet from backing in too far or from driving on wet roads. Still looking for a solution myself.
If yours is doing this when dry, I would consider replacing the override part located on the tongue. Apparently they go bad occasionally.
ccarlson