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Author Topic: Correct Horn?  (Read 5474 times)

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Re: Correct Horn?
« Reply #15 on: June 21, 2018, 01:40:09 PM »
Angle of the bracket could be diff.   Gm made the two diff parts sometimes. Waste of money.

Looking at the assembly manual, it appears that the process may have been that they installed the standard horn on the hood latch at one station, then a later station would then install the second horn and harness while moving the standard horn location to the fender.  If that is the case, it appears they swapped out the brackets at the time they installed the second horn.  All the parts I've seen have the bracket removable.

it's bee raining for two days, so I haven't had a chance to get into my detached garage to dig through the old parts bin.

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Re: Correct Horn?
« Reply #16 on: June 21, 2018, 02:30:09 PM »
The brackets are not remove able on the Pontiac horns, Year One used to stock the Delco replacements, generic, you might want to pm Sdba fit, he recently parted a Camaro. 
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Re: Correct Horn?
« Reply #17 on: June 21, 2018, 04:44:10 PM »
The brackets are not remove able on the Pontiac horns, Year One used to stock the Delco replacements, generic, you might want to pm Sdba fit, he recently parted a Camaro.

Found my horn.  Yeah the bracket is fixed and not removable, so there must be two types of low note horns based on bracket.  The horn has 'DelcoRemy USA' on it with "12v" and 'F' and a sideways "M".  There are two stampings on it with a "C3" and "101831".  Not sure if that is a part number?

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Re: Correct Horn?
« Reply #18 on: June 21, 2018, 08:24:33 PM »
I texted Roy, no Camaro Horns
I'll snap a pic of mine.  I've never compared firebird to camaro horns.
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Re: Correct Horn?
« Reply #19 on: June 21, 2018, 09:25:45 PM »
I texted Roy, no Camaro Horns
I'll snap a pic of mine.  I've never compared firebird to camaro horns.

My other two '76s had working horns back in the day, so I never took them off and looked at them.  Don't really know if there were any differences to the '78.  After looking at the original closely, the so-called reproduction horns don't look much like the original.  I'm thinking of drilling out the rivets and taking it apart to see if it can be fixed.

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Re: Correct Horn?
« Reply #20 on: June 21, 2018, 09:32:05 PM »
Well, let's see that. 
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Re: Correct Horn?
« Reply #21 on: June 21, 2018, 09:45:31 PM »
Roy’s got this , this is the firebird set up
« Last Edit: June 21, 2018, 09:49:56 PM by Burd »
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Re: Correct Horn?
« Reply #22 on: June 21, 2018, 09:46:58 PM »
Well, let's see that.

It's going to be raining tomorrow, so it's a good indoor project.

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Re: Correct Horn?
« Reply #23 on: June 22, 2018, 04:05:26 PM »
Well, let's see that.

It's going to be raining tomorrow, so it's a good indoor project.

Did find a video where a guy disassembles a horn to see how it works.  Looks like the problem was water collecting in the bottom of horn underneath the diaphragm on his:


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Re: Correct Horn?
« Reply #24 on: June 22, 2018, 04:29:26 PM »
Well, let's see that.

It's going to be raining tomorrow, so it's a good indoor project.

This guy shows how to disassemble, repair, and reassemble the horn to get it working on his dual horn Cadillac.  I forgot to mention the guy in the previous video had an F note and A note horn he tested and installed.


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Re: Correct Horn?
« Reply #25 on: June 22, 2018, 07:51:10 PM »
Roy’s got this , this is the firebird set up

That's a weird setup.  is that attached to either side of support for the hood latch?  Mine just attaches to the hood latch plate. 

I have it soaking right now in de-rusting solution.  I took the adjuster screw out and it looked clean on the inside, and tried hooking it up again with exposed metal connections and the relay just clicks.  So I think the issue may be the plastic melting inside that the Caddy guy mentioned.  So I need to pick up screws, nuts, and gasket sealer on Tuesday to finish closing it back up again.

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Re: Correct Horn?
« Reply #26 on: June 22, 2018, 10:49:54 PM »
That PC is vertical in the center.  It figures both cars lines had diff horns. 
« Last Edit: June 22, 2018, 10:50:34 PM by Burd »
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Re: Correct Horn?
« Reply #27 on: June 23, 2018, 12:17:22 PM »
Got it apart, real rusty inside.  I cleaned it up and didn't see any issues.  Will test it with a battery.  The paper gasket seems to act like a wick, sucking in water from the seam.  Rebuilding it with silicone gasket maker should waterproof it.  There was a bit of upturned flange that may have contributed too. 

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Re: Correct Horn?
« Reply #28 on: June 23, 2018, 04:21:33 PM »
I don’t know, They may be the same horn as Firebirds?
« Last Edit: June 23, 2018, 04:22:40 PM by Burd »
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Re: Correct Horn?
« Reply #29 on: June 23, 2018, 07:29:21 PM »
I don’t know, They may be the same horn as Firebirds?

The upper one is the optional dual horn location for Camaros, and the lower one is the location of the standard low or optional dual horn high. 

No luck so far get the electro magnet to work as far as I can tell.  Just painted it and will work on it a little more when dried.