Okay, I'll try this again. Regarding the "charge line" that I recommended to solve the issue of having to pull a fuse or install a fuse cutoff switch....in a Honda CRV, when you put the key in the proper position to tow, the factory installed GPS (if you have one) is powered up, even if you have the screen turned off it's still powered up "behind the scenes", along with other power draws, including (if you have one) a braking system like ours, which plugs into your 12 volt "cigarette lighter" plug-in. Over the course of an 8 hour day of towing, the battery will slowly be depleted. The charge line keeps the battery in the toad charged while you're driving. It's that simple!! I don't have any experience with the other problems mentioned with various other tow vehicles. I didn't realize that there were so many other reasons why a charge line wouldn't be the answer for some people, depending on the vehicle they tow. I guess I should have been more specific about the kind of car we tow. All I know is, it works for us, and for many other people who have posted on this website.
Good luck to those who need to find another solution....
And as always.........happy travels.
Bill