i have a trailer hitch and all the wired to use it. My problem is when i left turn, the light on the trailer dont light.
but brake light work, and 4 way work and right side.
but not the left side.
Have any idear how to fix that ?

 

What did you use for a wiring kit?

I bought the Mitsu factory kit, and it was plug and play. The trailer lights are isolated. The wiring for them is behind the tool kit access , or at least on the 2011 they are.
Power supplied by a wire under the hood, taped to the left headlight or core support. White or gray connector.