In my explorer it had a compass and thermometer in it like this:

and i would like to have that in my truck. how did the f-150s put these in the truck? I would like to have the same sort of deal on the roof but i have a screen there right now...i never use the screen anyways so im not apposed to loosing it. but if anyone has any suggestions of other places to put it let me know. but anyways, what goes into putting one of these in a truck that didnt have it originally? how do i route the sensor and stuff? Thanks for any help or suggestions.