Dead battery on toad with Unified Tow Brake
I've been towing a 2010 Scion xD (manual) with a US Gear Unified Tow Brake (TV-1000K) since April of 2011 with no problems until about two months ago, when I started experiencing a dead battery on the toad after 8 hours of towing. The Scion has an after market Pioneer Radio-Bluetooth-Nav System that cannot be powered off, but since I never had the battery problem for the first 12-14 months of use, I figure the radio is not the culprit. The battery on the toad checks out as "OK", so I suspect the power from the motor home to the toad may be where the problem is. Has anyone else had this problem? What's the fix?
2008 Itasca Meridian 37H/2010 Scion xD (5-speed)