When I had the Brake Buddy to never ran down my battery even after two days of towing.
But I no longer use the BB since I was having problems when I used it. I had to replace the brakes two times in two years. The BB people said there was nothing with there unit, but Ford claims it was because of the vacuum not being powered, so I will have to buy a different brake system. Still researching on what unit to purchase.
Ron
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