I have a 83 dodge ram d150 and if I let some days go by without driving it, it will drain the battery. I did the test using the meter to find the draw and it was traced to the EXT. LPS fuse, what does this run. I assume it's some exterior lights but it is not for the the headlights for sure. I'm assuming it may be the license plate light or outside cab light. The license plate has been moved and I'm wondering if someone mis-wired this. It was drawing about .53 milleamps when all was off which I understand is to much over a period of time. When i pulled that fuse it dropped to zero but I am not sure what it runs or is supposed to run.

Thanks

 

Pull the fuse and see what doesn't work.