I have a 2118 Explorer XLT with a parasitic battery drain that kills it in 72 hrs. Was checking watts while pulling the distribution and under-dash fuses one at a time to find the culprit. In doing so I found there is no fuse in under-dash fuse #1 location (demand lamp/battery saver) and it won't hold one when I try to put one in it. Possibly at one time the previous owner tried to force a larger fuse into this location and damaged the terminals, which due to housing and location I can't see. Had the car, and problem, for two years and everything works okay. What is the fuse for? Being called battery saver I'm wondering if this could be the answer to my problem.