The back-up lights don't come on and the bulbs are new. The truck was just recently put back on the road after sitting for about 6yrs. We had some other electrical problems but they got resolved. My question is where is the switch for those lights located and is there supposed to be a fuse for them? The manuals we have are alitte vague. Oh and the truck is a 350, automatic with air. Thanks to any and all that can help me out.