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Old 12-05-2023, 05:29 PM   #5
Second Series
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Join Date: May 2015
Location: Tukwila Washington
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Re: Horn connection: ’47 to ’52 steering wheel on ’74 to ’91 column.

Quote:
Originally Posted by mr48chev View Post
Have you even looked at how bad the fit of the wheel to the column is? By taking the horn piece and spring off and just setting the wheel down on the spline and standing back an looking at it? I'm not sure how you would cover up that 1/2 inch or so of exposed workings of the turn signal switch so it doesn't show. If you figure that out and it is simple you probably have something that you can market to others.

I'm thinking that you will have to do some mods to the tube from the canceling cam/horn contact on that tube and maybe some mods on the wheel where it goes through the the wheel to get that part to work.

Looking at this contact piece for that wheel and the pigtail that goes in the tube off the later unit it is going to take some figuring to have the piece for the wheel work with the with the contact inside the canceling cam.
Here is a picture of the mis-match, it’s not that bad. I’m thinking I can use epoxy to form a smooth transition. Maybe use a ring that matches the steering column and transition that to the steering wheel. A bigger issue is that when I tighten down the steering wheel nut, the wheel doesn’t turn easily like the base of the steering wheel bottoms out before the nut is fully tightened. Either a spacer, or cut out from the wheel should address that.

Here is a picture of the spring contact that goes in the cancel cam that I have. There is a video online that shows how to modify and install it. For now I pushed the spring contact out of the ’47 bushing and was able to get continuity from the horn button to the wiring harness.

Quote:
Originally Posted by fauXGT View Post
The newer aftermarket stock looking 15" wheels are made for the later columns. https://www.speedwaymotors.com/47-54...ck,405807.html Like a Flaming whatever, or a tilt GM. A much wider back compared to old stock wheels that are made to only cover a 2" wide column.
Mr48 has it right with the gap and mounting that will be visible between late column and old stock wheel.
If you have power steering, get a later 15" stock looking wheel that is wider in the back.
Hey! That looks pretty cool, I could use the original horn button with that. I notice they put the hole for the spring contact at 12 o’clock. I wonder what cancel cam goes with that wheel? I’ll ask them. I’ll try to make my original wheel work, but this could be a good replacement later.

Quote:
Originally Posted by joedoh View Post
you just need to drill a 3/8 hole at 2 oclock on your wheel, then you can use the spring through the hole to the horn plate. ididit has a how to on where and how to drill old wheels for new horn parts.
I’m not sure that would solve the issue. The spring contact in the column is at 2 o’clock, that contacts the ring on the cancel cam. The tube on the cancel cam at the 10:30 position serves 2 purposes. One to hold the spring contact that connects to the horn plate, and Two to keep the cam aligned with the steering wheel during rotation. I did watch the ididit video, it really helped me understand what is going on in there.
I assembled what I have with the spring contact at the 12 o’clock position, this offsets the signal cancel cams clockwise. When I get on the road I’ll see how that works out. I was thinking that I could build up a new Cam lobe in the correct position for this orientation. I was mistaken in my post as the Two screw holes in the steering wheel are for the puller(and not for the upper horn contact). That one puller screw hole is at 10:30.
I found this post that mentions the ’54 wheel hub is a good fit:
https://www.67-72chevytrucks.com/vbo...=743239&page=2
Here is a discussion on cancelling cams:
https://67-72chevytrucks.com/vboard/...d.php?t=515103
That gave me the idea to change search criteria and I found a ’67-’68 Corvette cancel cam that looks like it is clocked different than the ‘80’s version. This might work, here is a picture of a white one. Notice the spring contact tube is located outside of the two cam lobes. Further searching I found another site that sells a cancel cam compatible with 1967-68 GM Passenger, 1960-73 GM Truck. I’ll look out for one in the parts yard to confirm, unless someone here has seen one? Is the spring contact on these years at the 12 o’clock position?
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