I am having the same issue as described in this thread
https://www.ford-trucks.com/forums/1...ing-wheel.html

k9education posted a PDF with what I think was a wiring diagram, but it has expired. I would like to track this down.

Basically the problem is that my 2010 Expedition horn is not working from the steering wheel. The remote lock will trigger it, the fuse is good, the cruise control and radio controls work. It may be the wire from the connection to the fuse box, but not sure yet how to get to it. Can I get to the connector by removing the 3 bolts holding the trim around the steering column and separating those? I want to see if it is the switch or the connection to the fuse box. Any troubleshooting tips?

Thank you for any help.

 

A bad clockspring perhaps?

 

I guess it could be, but the cruise and radio controls work. I think there are multiple horn switches in the wheel, correct? Since they all fail, and I can't find a position on the wheel where any of them work, I think it is a connector or wire. I was hoping to get a wiring diagram to help trace which one it may be. I'm guessing it goes from wheel switch, through clockspring into connector, then wire to fuse box? If that is the case, would a jumper wire from horn fuse to ground cause horn to activate? Or would I blow something else up?

 

Checked to see which side of fuse was protected and momentarily grounded that. Well, needed to pick up some spare fuses anyway... No one has wiring diagram for 2010 Expedition horn circuit? Don't want to take it to the shop and need horn for inspection next month.