Horn won't stop

[airbornebandsman]

My horn started going off on its own this morning repeatedly, and I saw a spark/arc in the steering column where the horn button is (I don't have the rubber cover on) and then it just stayed on. I had this problem before and replaced the horn solenoid but apparently that wasn't the problem. Anyone know what else this could be? Thanks

 

[twright]

Horn button sticking

 

[Recovry4x4]

The horn is switched through ground so if the wire in the column gets a bare spot, it will ground and light the horn.

 

[dm22630]

Same thing just happened to me......it killed both my batteries.

Its the button sticking. Buy a new horn kit from ODIron. I have to switch mine out tomorrow.

 

[airbornebandsman]

i know the horn button isn't sticking, I have taken it apart a few times and it works as it should, that and the spark lets me know it's not a sticking issue.

 

[jatonka]

Where the wire comes through the bottom of the steering column is a very common cause of the horn blowing by it self. Check from there to where it goes across the truck to the horn itself. JT out

 

[Barrman]

Go to the front bumper, drivers side frame rail. Look underneath and you will see the steering box. A wire will be right infront of your eyes. It will be number 25. Unplug it. Please be carefull before you touch it and look for no insulation. 24V hurts and when you jump, you will hit something. One of those ask me how I know things.

You can test the horn by grounding the non steering box side of #25. I recommend you drain the air tanks first so you just get the click instead of the honk.

Push and pull on the steering box side of the wire and look for bare spots. You will probably have one. If not, go to the steering wheel end and do the same. All the button on the wheel does is ground the circuit, so if it keeps going off, a bare wire is somewhere.

 

[dabtl]

I have found horn wires that not only were frayed, but broken in the steering shaft. If the wire grounds, you have no control over the horn. The later horn buttons are much easier to work with than the early versions.

 

[M725]

It must be giving you a real headache .

My horn started going off on its own this morning repeatedly, and I saw a spark/arc in the steering column where the horn button is (I don't have the rubber cover on) and then it just stayed on. I had this problem before and replaced the horn solenoid but apparently that wasn't the problem. Anyone know what else this could be? Thanks

 

[bbbang]

Mine did the same thing, the wire was worn in the steering column. Pull and patch the wire and problem should be solved, until it wears again. Chris

 

[bulldog_mack13]

Its haunted , this reminds of ol' Sherriff Beuford T Justice of Texas horn sticking

 

[dm22630]

Go to the front bumper, drivers side frame rail. Look underneath and you will see the steering box. A wire will be right infront of your eyes. It will be number 25. Unplug it. Please be carefull before you touch it and look for no insulation. 24V hurts and when you jump, you will hit something. One of those ask me how I know things.

You can test the horn by grounding the non steering box side of #25. I recommend you drain the air tanks first so you just get the click instead of the honk.

Push and pull on the steering box side of the wire and look for bare spots. You will probably have one. If not, go to the steering wheel end and do the same. All the button on the wheel does is ground the circuit, so if it keeps going off, a bare wire is somewhere.

If its not the wire through the column & its not the wires that plug into the horn......where else are wires that could have bare spots & set it off?? I am having very loud problems with mine.

I replaced the horn button, replaced the wire through the steering column, and redid the connections to the horn & the horn is blowing at full blast whenever I plug everything back in.

 

[dabtl]

Grounding problem. Use a multimeter to test the entire circuit. When you find power, you find the problem.

 

[Barrman]

Wire #25 goes from the horn button on the wheel through the steering column and through the box. It has a Packard connection to another length of wire #25. This wire goes to the drivers side frame and back to the crossmember that goes under the radiator. It then goes forward on the passneger frame until it get to the solenoid on the horn itself. The other wire on the solenoid is also #25. That wire #25 will be hot. It travels basically the same path but it starts at one of the breakers on the firewall drivers side where wire #11 (I think) gives it power.

There are I believe 3 wire clamps holding the bundle that goes on the cross member under the radiator. That would be a good place to look for #25 getting grounded. Especially if you have been driving through brush or tall grass lately.

 

[roscoe]

I just developed the same problem. dm22630, did you figure it out and fix it? If so, be so kind as to explain. Thanks.

 

[dm22630]

Nope.....I just left it unplugged. I moved onto more necessary projects & totally forgot about it until I just read this thread again!

Sorry!

 

[neb4x4]

My m35 did the same thing one day, it was really bad.... I was showing off on a BIG hill that had a little mud on it.... And none of my friends 4X4 would do it... Well I kept climbing the hill over and over... Then when I was done I killed the 6x6. (not that it had anything to do with the horn) but the exact moment that I hit the front axle switch.... BOOM, Horn went off forever!!! I killed the truck. Tanks drained, unpluged the solinoid. Went home with tail between legs....

BUT found whoever ran new wires through coloum DID IT WITH THE WHEELS TURNED COMPLETELY TO THE LEFT!!!!!!! WTF!!! Anyways... re-wired it!!

Doing ok now!!! LOL

 

[roscoe]

neb4x4, so the wire was rubbing in the steering column?

 

[roscoe]

It wouldn't be so bad if the horn wasn't SO FREEKIN LOUD! Its like it goes into AIR RAID MODE.

 

[neb4x4]

Yeah, I "assume" this was a prolbem on my rig at one point before, or it was just plain wrong OEM. But "whoever" wired up the horn wires... Through the coloum. Did so with the steering wheel turned all the way to the LEFT. There-for making the wiring "in a 1/2 bind when straight" but eventually over time.... With turning right a few/many times... Well, wear became a factor. And one of the wires aquired a short to ground.

But with a little time, wire, solder, and heat shrink.... I got her working back in no time!!!

The only thing hurt was my pride.... Oh and ears unhooking the solenoid!!!