Hi Guys. I have a ton of mechanical experience but very weak in electrical. I hate it. Bought a 1999 Cummins for my daughter that will be turning 16 in Sept ( she will be paying me back for the truck, lol ) and even with new batteries, if it sits for a week or more, the batteries drain to the point it will not start.
I have tried to research this problem & have eliminated the seat belt modules are not the problem. What else could it be ?
Any help would be much appreciated.
On a side not, it also does what I think is a weird thing. Sometimes when you turn the key to t