Hey Red,
When I bought my 98 Explorer I had two keys come with it. Once I frogot my
other key in the house and retrieved the "spare" and it would NOT start my
truck. I thought there was a problem with the truck but when I got my
other key it cranked right up. If you do have a key made be sure to check
it before you leave from where you get it. It probably will NOT start your
truck but you can sit in your truck ALLDAY LONG... Good Luck!