i have a 94 Tahoe Lt that has a drain on the battery. i found the drain but don't know what to do next. it was in the horn dome fuse. if i put the fuse in and close the doors i can hear what sounds like a capacitor charging. I've seen things about a interior lamp control module but have also read that if it has key less entry its part of that module. i cant find either of them at a part store and would like to know if that's my problem so i can fix it instead of leaving out the fuse.