I finally decided to see if my trailor lights were working because i remembered from a few years ago that they didnt. So i bought all new wires and bulbs (4pin). Its a small 8X5? around there..two marker lights on the side up front and break/blinkers/running lights in the rear...I wired it up and now its giving me problems. When i turn my lights on on the truck all the lights on the trailor come on (good)..now i hit the blinker either way and all my blinkers on the truck come on and nothing happens on the trailor..turn the lights off in the truck and blinkers work fin...Anyone familiar with this 4pin setup..its very simple but i cant get it to work for the life of me.