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Does the horn sound when you press it on the steering wheel if not check for a blown fuse to horn and then if ok see if you have power to horn and then if that is ok run a wire from the battery to the horn and see if it honks.
you will find a fuse labeled HORN and a relay labeled HORN in the under hood fuse flock. Pull either of those to stop the horn from blowing.
If you need info on how to fix it i can help. You will need a test light or a voltmeter.
You can also try swapping the horn relay with another relay in the fuse block that is the same. If the horn works normally than the relay is bad and will need to be replaced.
Alarm Module Reset Procedure NOTE: This information applies to a Vehicle Theft Security System (VTSS) that was armed when the battery was disconnected and reconnected.
When the armed VTSS senses that the battery has been disconnected and reconnected, it enters its power-up mode. In the power-up mode the alarm system remains armed following a battery failure or disconnect. If the VTSS was armed prior to a battery disconnect or failure, the system will have to be actively or passively disarmed following a battery reconnection.
The power-up mode will also apply if the battery goes dead while the system is armed and battery jump-starting is attempted. The engine no-run feature will prevent the engine from starting until the alarm system has been actively or passively disarmed.
Passive disarming of the Vehicle Theft Security System (VTSS) occurs when the vehicle is unlocked using the key to unlock either front door or the lift gate. Active disarming of the VTSS occurs when the vehicle is unlocked by depressing the Unlock button of the Remote Keyless Entry (RKE) transmitter.
Once the alarm has been activated (horn sounding, lights flashing, and the engine no-run feature), either disarming method will deactivate the alarm.
Depressing the Panic button (if equipped) on the RKE transmitter will also disarm the VTSS, but the horn will sound and the lights will flash for about three minutes as part of the Panic feature. The horn and lights can be stopped by pressing any of the RKE transmitter's buttons or driving the vehicle above 15 mph.
Disconnect the negative battery cable. Leave it disconnected for a while. then reconnect so the cars computer box will reprogram to the default settings. If that does not work, you may possibly have to replace the box.the codes for keyless entry are individualized. The original owner may have the owners manual.
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