I bought a Curt harness for my 2008 Rav and installed according to directions (even the durn battery wire that runs the length of the car!) and so far have only a hitch brake light with which to test it. I would eventually like to use it with a trailer, but I'm having trouble with the wrong lights at the wrong times.
- All of my car lights are working fine.
- The trailer brake light only comes on with the left turn signal or the 4-ways