I have a '99 Ram that I haven't driven in about 14 days. This morning the main battery was dead (the seat belt tensioners wouldn't even release because they had no power). I suspect I may have to replace the main battery after being drained so thoroughly. I have a battery isolator/combiner which allowed me to start the truck and after a few minutes of charging it idled smoothly and I was able to drive it the rest of the day without incident. The main battery is only a few years old. It has sat for up to a week before without any problem. I haven't had a chance to have the main battery tested or to check my "truck off" current draw. So either...
1) The main battery needs service/replacement. 2) The isolator/combiner is drawing current from the main battery. 3) I have a current draw somewhere unrelated to the isolator/combiner. 4) 14 days is too long to allow the truck to sit without a battery maintainer.What is the "normal" current draw while the truck is shutdown, and how many days should I expect a stock (or replacement of like kind) battery to sit idle and still be able to provide cranking amps?