C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Weak Horn

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Old Mar 19, 2007 | 10:34 AM
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St. Jude Donor '06
Default Weak Horn

Slowly but surely working down the list of things to fix on my car... Now, I need to fix a weak horn. car is a 94 coupe. Horn blows but is fairly quiet. Any suggestions on where to start?
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Old Mar 19, 2007 | 10:37 AM
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Make sure both horns are blowing. If not work backwards from the one that isn't.
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Old Mar 19, 2007 | 01:06 PM
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Default Horn

The sound from these horns are not very loud anyway. I just jumped an additional aftermarket "loud db" horn onto the existing wires and found a place to take out a bolt and mount it in the lower left corner of the front fender. No problem with the fuse.
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Old Mar 19, 2007 | 01:34 PM
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these horns just seem to peter out after a while, replace both with the $10 units found at autozone/advance auto/etc, you'll need a low tone and a high tone to get the best sound.
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Old Mar 19, 2007 | 01:36 PM
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Originally Posted by JCD
these horns just seem to peter out after a while, replace both with the $10 units found at autozone/advance auto/etc, you'll need a low tone and a high tone to get the best sound.
Next time it rains, when it stops pop your hood and watch where the water goes. Yep, right onto and into the horns. I have the same problem, my left horn doesn't work anymore.
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Old Mar 19, 2007 | 01:53 PM
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Originally Posted by Mr Mojo
Next time it rains, when it stops pop your hood and watch where the water goes. Yep, right onto and into the horns. I have the same problem, my left horn doesn't work anymore.
C$, I mean C4's have alot of great things about them... but thing horn thing is crazy... Thanks guys.

Last edited by jakers; Mar 19, 2007 at 01:56 PM.
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Old Mar 19, 2007 | 02:17 PM
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The left horn on my '94 is dead also. The left horn is the "F-note", or "low" tone horn. The "high" tone horn sounds really weak on it's own - maybe it's on the way out also. Since it was dead I took it apart and found a shorted coil.
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Old Mar 19, 2007 | 03:11 PM
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Default Weak horn

Often it's the ground that's bad. On my '95 there is a separate ground wire. On earlier models (not sure when the switch was made), the ground was through the horn mounting bolt.
In either case, locate the ground, remove it and clean it thoroughly. Just like it was a battery cable. Clean both the eye bolt and the frame mounting point. Add a new washer if you can.
Hope this helps, it's free. And if it doesn't work you can always add a new horn later.
BTW, there's supposedly a service bulletin that GM stopped using star washers because they retained moisture and sped corrosion. Use whatever technique you can to get good contact and paint/coat the joint after refastening.
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Old Mar 19, 2007 | 03:42 PM
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Originally Posted by IRAraid
Often it's the ground that's bad. On my '95 there is a separate ground wire. On earlier models (not sure when the switch was made), the ground was through the horn mounting bolt.
In either case, locate the ground, remove it and clean it thoroughly. Just like it was a battery cable. Clean both the eye bolt and the frame mounting point. Add a new washer if you can.
Hope this helps, it's free. And if it doesn't work you can always add a new horn later.
BTW, there's supposedly a service bulletin that GM stopped using star washers because they retained moisture and sped corrosion. Use whatever technique you can to get good contact and paint/coat the joint after refastening.
Thanks John, Sounds like a plan. So your handle means one of two things to me...


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      Old Apr 2, 2007 | 09:56 AM
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      Default That is it.

      Originally Posted by IRAraid
      Often it's the ground that's bad. On my '95 there is a separate ground wire. On earlier models (not sure when the switch was made), the ground was through the horn mounting bolt.
      In either case, locate the ground, remove it and clean it thoroughly. Just like it was a battery cable. Clean both the eye bolt and the frame mounting point. Add a new washer if you can.
      Hope this helps, it's free. And if it doesn't work you can always add a new horn later.
      BTW, there's supposedly a service bulletin that GM stopped using star washers because they retained moisture and sped corrosion. Use whatever technique you can to get good contact and paint/coat the joint after refastening.
      That fixed my horns... I had a seperate ground wire on each horn. Used a wire brush cleaned it all up and it is fixed! beep beep!
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      Old Apr 2, 2007 | 10:15 AM
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      (at least on my 85) there should be a separate ground wire for each horn. clean the ground connections first. on my 85, the passengers side horn ground point had some corrosion, so, long story short - horn was not very loud - cleaned the (chassis) ground point, and everything was back to normal -
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