How did you disconnect the horn?
If you disconnected it at the horn, the horn relay is still energized and drawing current. Is the relay warm?
Disconnect the brown wire (one that goes up the column to the button) at the horn relay.
The entire steering column is out of the truck, so the brown wire from the steering wheel is no longer connected to the harness. I reconnected the horn and the horn no longer blows, so I doubt the horn relay is stuck.
