Horn help? - Team Camaro Tech
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post #1 of 17 (permalink) Old Aug 16th, 15, 05:23 PM Thread Starter
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Horn help?

Long story but I'm having problems with my horn, I know the horns work and I know I have good 12v - definitely an issue with the ground in the column. I've pulled the ground wire from the OE signal switch and am trying to get the horns to fire with a jumper. When I ground to the column, I get nothing. When I ground to the inside/unpainted part of the column, horns still don't work - but I get a spark from the wire. Any ideas what I'm doing wrong?




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post #2 of 17 (permalink) Old Aug 16th, 15, 05:27 PM
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Re: Horn help?

Brian - Do you hear the Horn Relay click if you disconnect the actual green horn wires from it then ground the horn button lead? If no click dead relay and you can either replace it or try to clean and re-service it.


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post #3 of 17 (permalink) Old Aug 16th, 15, 09:24 PM Thread Starter
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Re: Horn help?

Hmmm I just finished an AAW rewire using their classic update series. Since that change, I haven't ever heard the relay. It's essentially brand new.


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post #4 of 17 (permalink) Old Aug 17th, 15, 07:47 PM
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Re: Horn help?

I just did the AAW Classic Update on my 68 and had a bad horn relay.
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post #5 of 17 (permalink) Old Aug 17th, 15, 10:23 PM
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Re: Horn help?

Quote:
Originally Posted by Z28_302 View Post
Hmmm I just finished an AAW rewire using their classic update series. Since that change, I haven't ever heard the relay. It's essentially brand new.


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The AAW Classic Update comes with its own horn relay that plugs in under the dash. The OEM horn relay and voltage reg are scraped.
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post #6 of 17 (permalink) Old Aug 17th, 15, 10:32 PM Thread Starter
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Re: Horn help?

Right... So I plug a test lead into the ground on the AAW harness at the steering column and ground it - no horn action. Bad relay?


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post #7 of 17 (permalink) Old Aug 18th, 15, 04:02 AM
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Re: Horn help?

Sounds like it. Call AAW for a replacement.


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post #8 of 17 (permalink) Old Aug 18th, 15, 06:56 AM
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Re: Horn help?

Pull the relay and test it.

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post #9 of 17 (permalink) Old Aug 23rd, 15, 11:17 AM Thread Starter
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Re: Horn help?

Ok... New relay in. When I ground the test lead to the column, I can hear the relay click over but no horn. Any thoughts on next steps?


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post #10 of 17 (permalink) Old Aug 23rd, 15, 11:21 AM
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Re: Horn help?

Give each horn a few solid whacks with the plastic handle of a screw driver. They often get stuck


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post #11 of 17 (permalink) Old Aug 23rd, 15, 11:33 AM Thread Starter
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Re: Horn help?

So if I hear the relay clicking over, the circuit is getting completed and the problem is likely with the horns themselves?


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post #12 of 17 (permalink) Old Aug 23rd, 15, 11:51 AM
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Re: Horn help?

Quote:
Originally Posted by Z28_302 View Post
So if I hear the relay clicking over, the circuit is getting completed and the problem is likely with the horns themselves?


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Yes - it's very common for them to get stuck (for lack of a better term)

You can confirm the relay is working by removing the green wire plug from the relay to the horns and putting a test light in place. Push the horn button and the test light should illuminate.

You can also check the contacts in the green wires to the horns for cleanliness, as well as make sure the horns have a good ground connection where they bolt to the hood latch.

Odds are best though that the problem is with the horns themselves if you can hear the relay cllick


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post #13 of 17 (permalink) Old Aug 23rd, 15, 12:20 PM
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Re: Horn help?

Brian - or just test each horn by supplying direct positive to the green lead and make sure you have a good ground to the body of the horn. You stated in your first posting that you knew the horns were good and working before the wire harness swap. So we all skipped this test.


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post #14 of 17 (permalink) Old Aug 23rd, 15, 03:28 PM Thread Starter
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Re: Horn help?

Many thanks to all, much appreciated. I ran a test lead from battery positive to both horns with no action. I'll go ahead and get my steering wheel back on so I can drive to the parts store for some horns.


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post #15 of 17 (permalink) Old Aug 23rd, 15, 04:19 PM
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Re: Horn help?

Did you paint or otherwise prevent the horns from grounding through their mounts? Worth a second of your time to hook a test lead alligator clip to negative post and test again.


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