If you pull the horn fuse in diagram, that should kill the horn. My concern would be toward the ground wire for coil side of horn relay. The wiring that goes up into the steering column for the horn is a ground. Also your keyless entry can ground that wire.
Any work on the steering wheel or steering column, be sure to disarm the air bag first, you don't want it to blow up in your face. Safety is your responsibility.
Sunday, October 26th, 2014 AT 1:31 PM