We just had a very close call because of a BAD installation with our trailer braking system. Somehow or other, the tech wiring our brakes crossed up the wiring. When we turned on the headlights to the vehicle, the trailer's brakes engaged. The trailer would not budge. LUCKILY, we were just trying to leave in the early morning and NOT on the highway traveling 55 or 60 mph when we found this out. It took a while on our vacation to find an RV place that could correct the problem for us immediately so we could continue our journey. Imagine the cost to fix that problem....ON the road. Needless to say, we were NOT happy with the RV place where we purchased our travel trailer. :angry: They "gladly" reimbursed us for the cost of correcting the problem. Just check out your brakes ahead of time!!!