when i turn the ignition on, my horn honks

alarm system probably needs to be reset,disconnect the battery. turn the key to the on position. leave it in the on position. pull the fuse out,put the fuse back in. then hook up the battery, this should reset it.that fuse is also for brake /shift interlock system. make sure you have the radio code from the glove box to enter in the radio when the battery has been disconnected and reconnected.

When you turn the car on, take your back up key and insert into the door lock and rotate.