You'll need to describe what and where each pin goes to get any real help.
Some trailers combine the signals and brake lights onto the same bulb filament.
If this is the case you'll need a converter that cuts out the brake light to the specific side when the signal light is flashing.
Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)