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Old April 28th, 2010, 02:55 PM   #1
srlbotanical
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Default HORN PROBLEM left turn honking issue 2003 silverado

My dad has an 03 with a horn issue.

He was out of town about two weeks ago. At 1AM the horn goes off, a steady honk, and continues for 45 minutes until the horn burns out.



He takes it to the dealer, they can't find anything, and just replace his horns.

Today he calls me because the truck is now honking occasionally when he turns left.

I did a couple searches on Chebby sites. I can find this same issue in a few other threads. Some say it's a "warped plate" in the steering wheel, others have fixed it by replacing the multi-function turn signal unit.

Anybody seen this before?

Any help would be much appreciated.

Thanks!

Steve
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Old April 28th, 2010, 02:59 PM   #2
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yep have seen this has the steering wheel been apart?
possible horn contact in the steering column

Last edited by Bc1980; April 28th, 2010 at 03:14 PM.
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Old April 28th, 2010, 03:32 PM   #3
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I've seen it. It's the clock spring contact in the steering wheel. It keeps continuity in the switch so the horn will still honk when the wheel is turned. If that is bent, the contact will hit that ring when turning.
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Old April 28th, 2010, 03:36 PM   #4
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I have heard of it but it was always a prank that people would play by hooking the horn to the turn signal wires.
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Old April 28th, 2010, 03:37 PM   #5
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I've seen it. It's the clock spring contact in the steering wheel. It keeps continuity in the switch so the horn will still honk when the wheel is turned. If that is bent, the contact will hit that ring when turning.
yeah what he said. x2
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Old April 29th, 2010, 07:46 AM   #6
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Quote:
Originally Posted by GreaseMonkey View Post
I've seen it. It's the clock spring contact in the steering wheel. It keeps continuity in the switch so the horn will still honk when the wheel is turned. If that is bent, the contact will hit that ring when turning.
That makes sence for the turning honk. Any idea why it would go off in the middle of the night?

Also, is it safe to pull the steering wheel apart (airbag) if I just disconect the Neg battary terminal?

Thanks.
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Old April 29th, 2010, 08:01 AM   #7
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Quote:
Originally Posted by srlbotanical View Post
That makes sence for the turning honk. Any idea why it would go off in the middle of the night?

Also, is it safe to pull the steering wheel apart (airbag) if I just disconect the Neg battary terminal?

Thanks.
It's a good idea to pull the negative cable just to be safe. Just make sure when you re-install the airbag you should hear hear two audible clicks (I think there are two pins one on each side on that bag). Just make sure it is fully seated into the wheel. Last thing you want is that module flying out of the wheel into your face. I've seen it happen!
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Old April 29th, 2010, 08:17 AM   #8
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Quote:
Originally Posted by srlbotanical View Post
That makes sence for the turning honk. Any idea why it would go off in the middle of the night?

Also, is it safe to pull the steering wheel apart (airbag) if I just disconect the Neg battary terminal?

Thanks.
Wait at least 5-10 minutes after disconnecting the battery before removing the air bag. Most air bag systems have a capacitor to still set the bag off if battery power is lost.

The clearance between the contacts is very small to begin with. If that ring is warped, the temperature change between day and night could be just enough to get it to go off. I'm assuming it was just a constant sound?

It could still be something else but the turning thing kind of pinpoints that contact ring. I would have him check if having the turn signal on or off makes any difference, just to make sure the multi-function stick isn't yanking on a wire or anything like that.
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Old April 29th, 2010, 08:29 AM   #9
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If you get a chance when you pull that module out take pictures of the steering wheel horn plate assembly and the bottom side of the driver airbag. I'll see if I can see any abnormalities with the horn system. I've designed quite a few steering wheels and driver airbags for GM since that's what I do for a living.
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Old April 29th, 2010, 08:50 AM   #10
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When removing the air bag, remove the negative cable, then also pull the Air bag fuse, and disconnect the yellow air bag connector under the dash or knee bolster panel. You don't want that thing going off.

I would only ever pull the fuse when I pulled the air bag but I should have done all the above.
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Old April 29th, 2010, 08:53 AM   #11
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When removing the air bag, remove the negative cable, then also pull the Air bag fuse, and disconnect the yellow air bag connector under the dash or knee bolster panel. You don't want that thing going off.

I would only ever pull the fuse when I pulled the air bag but I should have done all the above.
He'll be fine just pulling the fuse and cable. I wouldn't mess with the connector under the knee bolster.
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