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Topic: Horn w/mind of it's own...

in Forum: C3 Electrical


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Horn w/mind of it's own... (2/12)
 9/6/10 10:35am
lukesvetteLifetime Member
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HOWELL, NJ - USA

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1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.


Joined: 5/18/2004
Posts: 6812

Sounds like the contact and spring or the ring they touch to complete the circuit. Mine did the same thing. If its similar to 77-82, you may need to remover the wheel to get at the contact assembly. See parts 1-4:


Good luck

Paul
Horn w/mind of it's own... (3/12)
 9/6/10 11:43am
Eric76
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Thanks for the reply. I thought that might be the next step.  The link you put in your reply doesn't seem to work for me.  Is that a step-by-step process to removing the wheel?
Horn w/mind of it's own... (4/12)
 9/6/10 12:28pm
daveo76
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Vancouver, WA - USA

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https://www.c3vr.com/forum/76-steering-wheel-horn-issue_topic78279.html?KW=steering+wheel

Try this thread.  I had a similar problem with my '76 after I took everything apart to replace the ignition switch.  I re-did as explained in the post and it works fine now.  


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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
Horn w/mind of it's own... (5/12)
 9/6/10 2:20pm
Eric76
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OK - I think I'll give it a try and take it down as far as I can go.  It does seem like it's a short somewhere or wire making contact when telescope is retracted fully. 
 
Question:  Is it 'normal' to have more than one shim?  When I pulled the horn cap/button and upper contact, there were 3 shims in the assembly.  Not sure if that's correct or not?
Question
Horn w/mind of it's own... (6/12)
 9/7/10 12:34am
daveo76
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Vancouver, WA - USA

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1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.


Joined: 8/25/2005
Posts: 857

By shim, do you mean the rings with the three screw holes?  I think mine had three....

It's really not too bad.  One thing that helped me was going to the Chevy parts counter.  The guy was pretty helpful and actually pulled up an exploded view that showed the plastic part I needed.  He ordered the part for me and then printed out the diagram and gave it to me for reference....very helpful.   If you don't get so lucky I could probably scan it and email it, but it's not a very good reproduction to begin with.   


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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
Horn w/mind of it's own... (7/12)
 9/7/10 8:17am
Eric76
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[QUOTE=daveo76]By shim, do you mean the rings with the three screw holes?  I think mine had three...[/QUOTE]
Yes - that's what I'm talking about.  I think I need to get in there and see what's going on.  Did you have to use a steering wheel puller to locate the problem?
Horn w/mind of it's own... (8/12)
 9/7/10 12:42pm
Adams' AppleLifetime Member
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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


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You most likely have a short in the wiring inside of the column. You stated that it still does it with the horn contact ring out. You're gonna hafta pull the wheel off to get into it to do anything. You will need a puller to get the wheel hub off...
 The wiring for the column moves as the wheel is telescoped in/out, and eventually, it causes chaffing on the wires, which can lead to shorts...and horns beeping.
There can be any number of shims on the horn contact...there is no set spec for how many, other than a clearance spec between the horn button, and the wheel hub. Yo add or subtract the shims to get the clearance right, so it doesn't beep accidentally, or not at all.

Good to see ya around, Eric! It's been a while.



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Joel Adams
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Horn w/mind of it's own... (9/12)
 9/7/10 1:42pm
yostusota
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I think Joel is right on this one also..BTW I just got the Error message and had to sign off and on again to make it work!
Rich

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Horn w/mind of it's own... (10/12)
 9/7/10 7:50pm
Eric76
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Adam -
 
Thanks for the feedback and info - I think my next stop is to pick up a steering wheel puller and give that a try. 
 
I feel a littel nervous venturing into unchartered waters (for me), but how bad could it be (famous last words) with resources like C3VR!
 
Glad to be back, Adam! Wink
Horn w/mind of it's own... (11/12)
 9/7/10 10:06pm
yostusota
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York, PA - USA

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1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top


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It might be a time to replace the wire from the horn button to the harness below.. just cut that old wire and tape a new one to it and pull it down the column!!no fishing needed..pullers can be had at sears for little money also..
Rich
 


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Horn w/mind of it's own... (12/12)
 9/7/10 10:20pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20126

I think the horn wire is part of the turn signal harness...you'll really need to pull the harness up/out of the column, unless you can find/fix the problem at the top...

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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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