Horn has mind of its own
Jim G:
Hi all,
So I fitted an aftermarket steering wheel to my TR4. Being reasonably tall, the smaller aftermarket wheel helps with leg room - now I can actually get my legs under the wheel without the blood flow to my feet stopping.
Question: for some reason my horn now sounds intermittently and of its own volition when I turn slightly to the right.
Clearly a short somewhere but does anyone have any thoughts where it might be happening? I've checked everything I can see around the column and associated wiring but can’t see anything obvious.
Annoyingly, sometimes the horn push doesn’t activate the horn, sometimes it does...
Its driving me nuts!
TIA
bobhustead:
Unlike most switches that connect the device to power when you throw the switch, the horn switch connects the horns to ground. The wire going to your horn push is grounding someplace outside the intended circuit.
Bob Hustead
charley fitch:
Well Jim you are not the only one that has the exact same symptoms with the horn. I am convinced that the place of contact is the contact ring inside the column just below the steering wheel. The same ring that the horn push is supposed to make contact with to sound the horn. I notice on the Moto Lita wheel that I put on that there is a raised ridge of about 3/16 of an inch that is just above the contact ring. I removed most of this but am still getting the horn to sound. I next am looking at the likelihood that the ring is not staying seated in the column properly and is lifting up and that is making the contact. There are some tabs that hold the ring in place. But over time those tabs appear to break off and then the ring is able to float around a bit.
I will let you know in a week or so when I get to that little problem, if I am successful in getting it to work properly.
Charley 8)
Jim G:
Thanks Charley, my wheel is a Mota-Lita also, think it's called a Mark IV.
When I get a little more time I plan to look at it more carefully and I will let you know if I find anything also.
I swear I read a forum entry somewhere on the net about this same problem before I experienced it but cannot now find the article...
Jim
charley fitch:
I took a quick look today at one of my TR4's that is NOT having a problem with the horn honking on its own. I note that on this one I have a separation of the steering wheel from the column that is maybe 3/8 ". I can see the horn contact ring in the column and the base of the MotoLita wheel is maybe 3/16 to 1/4 inch above the contact ring. This does two things, first it creates the separation of the steering wheel and the contact ring and second it gives me a little more distance of the steering wheel from the dash. Yes, I am tall and really need the room for my knees.
I anticipate that I will try to duplicate this situation in the TR4 that is honking on its own.
Charley 8)
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