95 bronco horn stuck on

[Dingo0722]

I have a 95 Bronco EB 351 that the other day the horn just went off while it was parked. I have it put away for the winter with a trickle charger on it. Yesterday I was working to diagnose the cause. First thought was it was either the horn buttons failed or the relay did. I disconnected the wires behind the steering wheel air bag and this did not resolve the issue. Then I disconnected the relay. The horn stayed off when relay was out, turned on with relay installed. The relay is #3 under the hood. I pulled #2 relay and swapped it as well as #4, but the horn still activated. I started the truck up and nothing changed. Inspected all wires for any mouse damage and found nothing. This Bronco does have a factory alarm. Might this be the cause of this issue?

 

[Jimbo26]

I can see where a factory alarm setup could be the issue there. A wiring schematic is in order for that. Regret I don't have anything to post up to be of assistance.
Try contacting one of the local gurus here via PM.
L-bronc or Tiha should be able to help.

 

[Tiha]

I have no idea where the factory alarms diagrams are. I can try to do some digging though.

But I agree the alarm system is probably the issue, if you know where the box is, you can just unplug it, see if that fixes the problem.

Back in the day, the alarm boxes used to be in the pass kick panel I believe.

 

[L\Bronco]

Here you go, looks like a short in circuit 1 dark blue. Note, it is in a different connector than the air bag circuit, stuck switches is the most common cause. make sure what you unplugged has the blue wire in it. (It should be behind the column cover. (plastic trim))
Hope that helps.
Cheers!!