When I first bought my '05 X-2, I was towing it with an '01 F-150, and I was having the same problem. It turns out that my truck didn't have a certain fuse in the fuse box under the hood, that was required to release the brakes when backing up. I added the fuse and never had that prob again. If your trailer has worked properly before, then maybe you just have a blown fuse somewhere. Just an idea, hope this helps, sorry I cant be more specific, it was a while ago...
|