So, my 1971 Series 3 2+2 horns work just fine; however, they’re wired to a push button switch under the dash. I’d like to have the normal steering wheel center horn “button,” or whatever it’s called, operate the horns. It’s nice and “springy.” My question is: exactly where do the two horn relay wires connect to the steering column/wheel? Obviously one wire is a ground, which can go anywhere. The other positive wire needs a steering column/wheel connection, but where?
You need to remove the parcel shelf etc then looking up under the dash you should see a connection to a wiping contact onto the steering shaft by the top column mounting bracket.
Hope this helps
Only one wire from the Horn Relay is connected to the Steering Column, that being the Ground Wire (Purple and Black); it connects to the contact shown in the circled area of Bob’s picture above. The Push Button when pressed, connects W2 of the Horn Relay to Ground. The active terminal of the Relay (W1) is connected to Fuse #7 via a Green Wire.
Got it and thanks; however, made the connection, but no horn. Upon investigation, I found no electrical connection between the copper piece (circled in red on the photo) on the steering shaft and the pin in the center of the steering wheel horn button, which I believe there should be, right? The springy horn button works OK but doesn’t actually ground the black/purple wire. The flat copper piece (circled in red) rubs on the steering shaft but doesn’t appear to connect with the horn button center shaft. What next? Thaks.
Hi Ferman, check under the horn push button, you should have a brass stud in the center with a spring behind it. If its there, it may be that the top section of the steering column has been taken apart and the brass shaft was not inserted back into its receiving partner lower down the column. This can be hard to do, I struggled to get mine to insert back correctly.
Best of luck
Hi Ferman, here is a picture of the top of the steering shaft, behind the horn push, this is what it should look like if everything is OK. When its being inserted back into the bottom section, you have to “guide” the bottom by holding the top section, when its being inserted.
Hey, Joe, yes, I have that brass stud with the springy top section. And down the column I have the bottom part (rub ring) within the column on which that flat brass clip rubs. It’s just that the two are not connected electrically. I see what you’re saying, that the brass stud needs to be maneuvered to fit into the bottom rub ring. OK, off I go. Thanks.
Hi Ferman, also check that the flat brass clip hasn’t built up “crud” between the clip and the shaft, this would stop the circuit. Disconnect the battery, then get a circuit tester and probe both ends to check if they are connected, (top brass stud to rubbing strip) if there is no connection, it can only be where the shaft is inserted together in the center, it has missed the target while being re-inserted. The reason this inner sliding connection exists, is to allow the steering shaft to be adjusted in length, and still make contact. If you do take it apart, all will become clear. I used a “sacrificial” rubber ring to hold the shaft centered while I inserted it back home. This rubber ring then becomes a permanent resident at the top of the shaft.
Best of luck.
Hi, Joe and All. First, yes, I have a good connection between the flat brass “rub ring” and the steering shaft. I checked it with my ohmmeter. Second, I cannot get the brass rod to insert anywhere inside the steering shaft where it makes electrical contact with the “rub ring.” I have also tried using a thin metal rod to poke around, but no electrical connection (by “connection” I mean a circuit as verified by ohmmeter.) My next move is to remove the steering shaft, which I have done before. There is a screwed piece in the shaft, (which, when in place, keeps the steering rod from sliding all the way out but permits it to move in and out a few inches for adjustment). The screw is held in place with a flat brass locking spring; however, I cannot find it again. Do you know where to look?