When we had a Brake Buddy, we had numerous problems with operation. They insisted that I needed a dedicated 20 amp power source and sent me a fused kit to install directly to the battery power block. Are you using a "factory" power socket that came with your toad? If so that could be your problem. Our BB was shipped to the plant 7 times in about 5 years, the last time the repair lasted two weeks. Switched over to a Patriot at a show when they offered a $400 trade any for any other "Brake in a Box". The Patriot has gone in 3 times since 2011, recently for a software failure, twice for battery charging problems. We do full time so the braking system is used a lot.