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SHOCKING! What did I do wrong?

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Old 09-17-2014, 10:20 AM
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Revfan
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Default SHOCKING! What did I do wrong?

For those playing along at home... 1967 Convertible

So, If I am driving the car with my arm on the window sill touching the metal parts of the "door," and I press the horn button...

I get a shock/jolt of electricity.

What did I hook up wrong?
Old 09-17-2014, 10:31 AM
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lonzoo
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Originally Posted by Revfan
For those playing along at home... 1967 Convertible

So, If I am driving the car with my arm on the window sill touching the metal parts of the "door," and I press the horn button...

I get a shock/jolt of electricity.

What did I hook up wrong?
Sounds like the ground may not be making good contact to the horn and "YOU" are becoming the link to the ground. Just a shot in the dark. Does the horn work by pressing horn button ( without arm out the window)? Does the amp guage take a dive when blowing the horn?

?
Old 09-17-2014, 11:32 AM
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kidvette
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It may be no ground at your steering coupling rag joint. The OEM joint had wire mesh inside it to complete the ground. Most replacement rag joints lack the wire mesh inside and require a wire lead strap.
Old 09-17-2014, 12:09 PM
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Default I think

We need some more testing!

Maybe after about 20 more shocks, we will be able to figure out what wire got pinched in the steering column horn hookup and is shorting 122V to the metal button at a certain position when the wheel is turned! I would take the horn assembly button apart, disconnect the 12V and start doing continuity tests!

Last edited by TCracingCA; 09-17-2014 at 04:45 PM.
Old 09-17-2014, 12:23 PM
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6D2148
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Originally Posted by lonzoo
Sounds like the ground may not be making good contact to the horn and "YOU" are becoming the link to the ground. Just a shot in the dark. Does the horn work by pressing horn button ( without arm out the window)? Does the amp guage take a dive when blowing the horn?

?
Old 09-17-2014, 12:27 PM
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Revfan
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Yes
And its intermittent. It doesn't shock every time.
Horn works in all situations (arm in out, no arm etc), other than the occasional shock.
Old 09-17-2014, 12:31 PM
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65GGvert
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Definitely a grounding issue with the column. (rag joint area). The horn relay has a coil to activate it that will discharge and cause the shock. You can put a jumper between the two sides of the rag joint connectors to test the theory.
Old 09-17-2014, 01:12 PM
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Current always takes the path of least resistance to ground.

If sometimes, that is through your arm to the door, it means the ground to the horn circuit is a weak/intermittent connection.

Last edited by SDVette; 09-17-2014 at 02:44 PM.
Old 09-17-2014, 01:30 PM
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wib1961
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Originally Posted by Revfan
Yes
And its intermittent. It doesn't shock every time.
Horn works in all situations (arm in out, no arm etc), other than the occasional shock.
What are you using to blow the horn when "no arm"
Old 09-17-2014, 04:03 PM
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nassau66427
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Originally Posted by kidvette
It may be no ground at your steering coupling rag joint. The OEM joint had wire mesh inside it to complete the ground. Most replacement rag joints lack the wire mesh inside and require a wire lead strap.
Actually, the original had a copper ground strap.

Service replacements and later models (C3?) had the molded in mesh.

Original steering coupling ground strap:
Old 09-17-2014, 06:45 PM
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Roger Walling
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How loud do you yellwhen you hit the horn?
Maybe you don't have to fix the horn!
Old 09-17-2014, 06:49 PM
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VetteRed1965
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I think you need to take a picture off you hitting the horn with you arm touching the metal part of the door and post it
Old 09-18-2014, 01:27 AM
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Revfan
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How loud do you yellwhen you hit the horn?
Maybe you don't have to fix the horn!
I come to the forum for the help....

But i stay because of the humor!
Old 09-18-2014, 06:22 AM
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MarkC
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Greg, did you get the spring issue straighten out? This looks like an easy fix. How is the car doing?
Old 09-18-2014, 11:21 AM
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Default Ok for funny

Lets assume you have walked across some carpeting building up a static charge before jumping into your Corvette, therefore maybe we should hook multimeter leads to you to see if that might be the culprit.
Old 09-18-2014, 01:14 PM
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jkuzzy
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Originally Posted by Revfan
I come to the forum for the help....

But i stay because of the humor!
Old 09-20-2014, 11:09 AM
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My 65 did the very same thing. I didn't care, just chose not to blow the horn. Anyway, I pulled the engine to rebuild and paint - reinstalled and grounded the engine and exhaust according to the manual. No more shocking when blowing the horn.

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Old 09-20-2014, 03:29 PM
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Dave1998
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Have you considered a less expensive, proven method?
Just buy one of those bumper stickers for your Vette that says:

Horn Broke - Watch for Finger !



Dave
Old 09-20-2014, 11:11 PM
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Jimbo64
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Originally Posted by nassau66427
Actually, the original had a copper ground strap.

Service replacements and later models (C3?) had the molded in mesh.

Original steering coupling ground strap:
show me a pic of this in the car- should my 64 Have it- do not see it comes with the grounding strap kits in the catalogs
thanks
Old 09-21-2014, 09:19 PM
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Oaker57
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Originally Posted by Revfan
I come to the forum for the help....

But i stay because of the humor!
Now, that's funny...



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