Re: Visual vs. pull test on hitch.
I do both. I look at it, but I still do the pull test since that is a true function test versus an appearance test. It verifies that the jaw or jaws are truly holding in the pin. Along the same lines, I both apply the trailer brake with the umbilical hooked in and place a chock in front of one of the wheels. Redundancy. The consequences of a failure are severe enough that I don't feel it is a time to be concerned with convenience or eliminating steps. I am actually checking the integrity of the trailer braking system at the same time.