Originally Posted by coupevillefish
You can also install a switch. The bad news is that either option will loose the program settings in the radio according to our dealer. Our brake unit sends a trickle charge to the battery but we haven't towed far enough yet to know if that is sufficient.
Well, the jury is in. After an 8.5 hour day, but only about 300 miles because of several stops, the battery is dead. The trickle charge was not sufficient to keep up with the time and possibly the stop and go traffic through Sesttke, Tacoma, and Portland.
My current plan is to run it each time we stop then eventually get the larger battery. Fortunately, we have a jump start battery with us to get it going in the morning.