Brake vacuum leak
After a 3.5 hour drive, we stopped to unhitch the toad and found the car batter was dead. After a jump start, the battery was OK. Turns out there is a leak in the vacuum system that caused the SMI brake to cycle every couple of minutes for the 3.5 hours. This was too much for the 5 year old battery. Now I need to find out where the leak is. I really don't want to drive without the brake. The battery had a 84 month warranty but got a new one anyway.
2005 Winnebago Sightseer 30B, F53 Chassis