i have a 97 Z71,after locking doors interior lights stay on,i can unlock and lock again and they go out for awhile maybe 15-20mins,and come back on.i pulled fuse to keep from running the battery down.now i can here a clicking under the dash,sounds like a relay but not sure.i thinking its something with the keyless entry,or maybe a light timer.hoping someone has been down this road before.also where is the timer located?thanks.