Hi,
My manual goes up an F450, but they should be the same.
As far as the location, it is behind the glove box, but there is a little more involved to access it.
If you look below, I attached the directions for replacing it. Take a look through them and let me know if it helps.
Take care,
Joe
See pics below.
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Sunday, June 25th, 2023 AT 10:33 PM