I thought I had this solved but the gremlins came back to haunt me. O.K. Here goes... Bought a 70 Chevelle that had an old Grant steering wheel in it. The horn was not working so I put in a new horn relay, still didn't work. Found I had twelve volts at the horn plug so I bought a generic horn from a chain store and eeeverything was fine. Then I changed the old Grant wheel to a new one. The horn worked O.K. but I noticed that if I hit the outer part of the steering wheel with my hand fairly hard the horn would blow. Now about a week later the horn doesn't blow at all and the horn relay makes a funny thumping kind of sound when I press the horn button. After trying to figure out what was going on for about an hour or so I'm going in for the night and shut the hood of the car and the horn relay starts making a buzzing sound and thumping like someone is pressing the horn button. The wiring on this car has been hacked by other people, wires cut and reconnected etc. etc. so it is difficult to know what's going where. ANyone have any insight would be appreiciated. I just read Desert Sun's post and Bob M's excellent response about grounding steering shafts but I don't know if that applies to my 70 or not.