So it was about 40below zero here in Minnesota a week ago. During the cold spell my horn sounded very high pitched. I asumed it had something to do with the cold but now that it warmed up it still sounds different
Anyone have this happen before? Is that a waranty item?

 

yeah, its happened to me a few times when the temp really dropped, usually if i press it a few times it goes back to normal.
id imagine it would be covered

 

mine sounds weird when it gets water in it but always goes back to normal. see what happens when it warms up.

 

Well there is actually 2 horns on the truck, a high pitched one and a low pitched one, so I'm guessing your low pitched horn went out

 

If you want louder... get a train horn. Problem solved.

 

where is the horn located on our trucK? i want to swap mine out for a new one.

 

passenger side behind the front bumper

 

Mine got water in it and it sounded like a bicycle horn. Ford replaced it under warranty.