I have an 85 f150 and when i bought it off craigslist, the horn was sort of taken apart and it has a gt grant steering wheel which doenst have a horn either. The actual horn button for the gt grant was in the glovebox and Im just wondering if there are any pieces missing like a contact plate or something like that. Also does anyone know what the inside of the stock 85 f150 horn looks like? I need to see diagrams and stuff but can't find squat.

 

Here is a wiring diagram showing Cruz control and non CC circuits.
You will have to wire an external horn switch differently depending on if you have CC or not.

http://imageshack.us/a/img18/2041/cchorn.jpg