Well I've tested the horn itself, by jumping to batt, it is fine. But Cruise does not work, and push the horn pad and the fuse blows.
Any suggestions to check? pulled the horn pad and all looks OK there....

 

Has any swapping been going on? Did this truck originally have cruise or it did not? Does it have the cruise stuff under the hood or does it not and just has a cruise steering wheel on it?

 

Hi Dave
This is a AC, Cruise, XLT Complete cab, now bolted to my chassis.
The cruise unit is plugged in under the hood, but everything under the instrument panel has been undisturbed other than The AC Cruise cab was an Auto, and it is now a standard....

 

lost on this one....

 

The reason I asked, the horn wiring is different on a truck with cruise.

On a truck with cruise, the horn wire is grounded by the steering wheel and uses a relay. Without cruise the steering wheel switches the positive wire of the horn.

If you had the + non-cruise wire going to the horn and put it on the cruise system it would blow the fuse everytime, since the cruise system grounds the wire.

 

I think you are on to something. pulling the horn/cruise pad off the wheel, there are 3 wires,
Black
Blue
Yellow with blue dots.
The black has a post on it and goes into a hole in the column, (ground)
the blue and yellow with blue dots ate in a connector and plugs into the two male spades on the column.
Now jumping the two n the connector, the horn blows, (with the Black unplugged)
black plugged in and blows the fuse.
SO the wiring in the column looks like a non-cruise harness, according to EVTM, Yet the thing has cruise amplifier and horn relay......