3 weeks ago I bought a '02 f-250, my first diesel. Took me about a week to get used to the glowplugs before starting up. Just noticed a couple days ago the overdrive button to click off overdrive doesn't work, everything seems fine tho', no problems or noises. But I wonder if there is a fuse for the overdrive button that blew. Looked in the manual but can't find a fuse listed for that. Anyone have any ideas. Thanx in advance.