What did you do to your Class A MH today???

Removed the Reefer roof vent and added 4 quarts of 15 to the engine. another 4 quarts tomorrow and so on until the change is completed. Still need to change the oil filter. I found the Chassis Battery dead today. I do not understand what happened. It was fully charged two weekends ago and all I did was start the coach and move it two feet so I could work on the rear area while in the barn. I will now have to start trouble shooting the battery problem. I also found several wire harnesses in the top of the reefer vent cavity I will try to trace down.