I fixed this a while ago for my friend and knock on wood that mine doesn't fail, but she seems to really like the fix: Pull the number 18 fuse and blow it (connect it to something you know will blow it with destroying the entire fuse housing). Solder a wire to each prong and then solder both an inline fuse of the same strength and a toggle button of your choice into the line. Prong, Toggle, In-line Fuse, Prong. Give yourself enough line (wire) to mount the toggle inside the glove box or underneath the dash similar to a "valet" switch from the 80's alarms. Yes, you'll have to push the toggle and wait 20 seconds before starting, but there's now an added level of security to your truck and it cost you $5 at Radio Shack.