Pull the steering wheel. It,s probably the little rod with the brass roller on it. It is spring loaded to keep constant contact on the horn ring as it rotates with the wheel. It may have locked up and snapped off, making constant contact with the other side of the circuit. A quick inspection will probably show this or some other problem under the steering wheel.
If you have a rim blow steering wheel they short out from heat. I worked in parts dept at a Dodge dealer in 73. I lost count of the number of cars that came in with fire damage from the horn stuck on and overheat the circuit. The tech started putting inline fuse on the wire to the horns.
To disable the horn, simply pull off the spade connector (green wire) at both horns. All the button on the steering wheel does is ground the black wire to the horn relay. Anything that grounds that wire will actuate the horn (without blowing a fuse). As said, it most likely is getting grounded near the turn signal switch, since that is where things rotate, but could be the wire under the dash, or in the bulkhead connector, or the engine bay where wire insulation gets brittle and flakes off.
Well, you should unplug the relay, otherwise the relay will remain activated. This will drain the battery, and it just might be, that like starter solenoids, horn relays might not last all that long in "continuous duty."
Well, you should unplug the relay, otherwise the relay will remain activated. This will drain the battery, and it just might be, that like starter solenoids, horn relays might not last all that long in "continuous duty."
Had the same problem on the 1/8 mi strip. From the x mas tree to the finish line and down the return road. I tried to unhook the horn relay under the dash and man was it hot!