I'm at a loss, I have a cruise equipped cab. If I push the horn pad it blows the 20A fuse.
I have 3 columns, 2 auto tranny that had cruise, 1 Standard tranny that had no Cruise,

I went through the EVTS manual to try and figure this out.
The manual shows a wiring diagram identical to what I have, but that says "Horn with no Cruise"

But it does have it,

So I looked at the wiring of the non-cruise and the two Cruise equipped, columns.
Under the horn pad they are all Identical....
SO is there a wiring difference or did Ford put all the wiring in every column and some use it, some don't???
Thanks

 

My 84 has the cruise control equipment under the hood, but has just a horn pad on the steering wheel. I think sometime ago, the column was changed, because I found a spare set of hidden keys, the door key works, but not the ignition.
I bought a cruise control equipped horn pad from EBay. The cruise control DID NOT work with the new pad. The horn blew when you pushed the ON/OFF switch, but not with the horn button on the pad.


FWIW

 

The only wires in the steering column are part of the T/S switch.

1984 F150/350 & Bronco / 1984 E150/350 with 3 & 4 M/T:

E4TZ-13341-A .. T/S Switch - Use with fixed steering column / Marked on paper tag looped on the wires: E4TA-13B302-AA / Obsolete
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1984 F150/350 / 1984 E150/350 with 4 M/T:

E4TZ-13341-B .. T/S Switch - Use with tilt steering column / Marked: E4TA-13B302-BA / Obsolete
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ONLY 1980/86 F100/350, Bronco & Econoline with factory installed Speed Control have a horn relay.

The horn pad is different with factory installed Speed Control for an obvious reason. 1980/81: There are TWO different Speed Control switches, one was also used 1982/87.

 

Always wondered how factory cruise worked on theses trucks as a factory cruise truck has just two wire hook up for the horn pad just like a non cruise. Mine has factory cruise with two wire hook up that everything works on and customers truck has no factory cruise but has two wires just like mine.

Biggest difference is mine has a relay behind the dash for the horn which also supplies power to the cruise where a non cruise truck does not have the horn relay.

 

Hey maytag906,
That is exactly what is happening to me, horn blows if you push the ON/OFF switch, SO There is something wrong somewhere else then???
Thanks

 

Ralph (81-F-150-Explorer) explained in fairly intricate detail how those switches work, IIRC each cruise switch provides varied resistance to ground, which the brain box knows how to interpret to determine what you are telling it to do.

It sounds to me like somebody has their horn pad miswired, with the horn-control signals routed through the cruise control switches instead of the horn actuator buttons.

The terminals for the horn are two spade connectors coming directly out of the steering wheel near the hub & nut; those get connected to the horn wires on the pad which I think are solid gray and freestanding on their own, either wire can go to either spade connector. The cruise control wires (colored, not gray) are contained together via a plastic assembly which allows them to be connected to their appropriate spade connectors (which I entirely forget the details of but they are totally separate from the horn).

If you want to determine if an exposed spade terminal is for the horn, I'm pretty sure you can use a short jumper wire to connect them to ground which should trigger the horn.

EDIT: Quite possibly some horn wires on the pad are connected together via a plastic assembly, but the important thing to pay attention to is the colors of the wires.

 

Don't know if this helps or not... Black wire and spring clip is the horn ground, the yellow and blue belong to the speed controls.

 

That is exactly what I have. I have 2 cruise horn pads and on non cruise.
All of them are like the above photo....
The yellow one has the power, and this follows the EVTM as shown "HORN Without Cruise"
Even the cruise pads are wired this way, but the EVTM says there is NO yellow wire up by the horn pad, It shows a DK Blue, Black, and Lt Blue...
and If I plug in the black ground wire to the column where it is supposed to go, if you push the horn pad, the fuse blows....

 

I apologize if this turns out to be a thread-jack but your question has me curious. Mine was originally equipped with speed control but has been long since removed by the PO. I am looking at a few horn pads w/o SC to replace the cracked SC horn pad. I'm now wondering if this will be a swap-out or is there something else I have to do. I'm watching this thread closely.

 

I don't know if this will help or just add to the confusion... The horn bar itself has two black leads. The pig tail plugs into the speed control harness with one prong correlating to the black spring clip ground wire, and the other to the yellow/blue trace wire...








The yellow/blue trace seems only to be in the horn pad... this speed control diagram does not show it in the column either.

 

Thank you for the pictures and help, Jonathan! I have a bunch of steering wheels & horn bars & whatnot in my basement "somewhere," and what I wrote yesterday I did by memory... but it looks to be at least somewhat correct and I hope I helped.

 

What I don't have handy today is a non-cruise pad. I'll try to find one and post a pic of how it is wired.

 

Here is what I have for a non-cruise steering wheel + horn ring:

 

So it looks like non-cruise horn bar grounds through the prong that is used for speed control on cruise trucks? Interesting.

 

The non-cruise horn system does not ground itself in the steering column. There is no ground in the non-cruise horn system except at the horn itself. The non-cruise horn has a hot coming in, is switched by the pad, and has a hot leaving going to the horn. That is why if there is a ground anywhere, it will blow the fuse.