I just changed the spark plugs and wir...

First, unplug the horn relay and replace it. It is sticking and only powers up whrn the ignition is turned on.

Second, look for a loose wire or set of wires under the hood that you had to "stretch" when you changed the plugs.

Do you have a fob (remote)? If not, you may have an override button inthe fuse box. Look for a reset button (press all of them) in the fuse compartment.

Please post a comment! Everyone is anxious!

this is a first change the plugs and now the horn wont stop---- dont call a mechanic call a exorcist

This may not be coincidental. You may have a faulty horn switch behind the steering wheel.