Horn
Thread Starter
Melting Slicks
Joined: Nov 2005
Posts: 2,297
Likes: 156
From: Clayton New Jersey
Horn
Just finished rebuilding the column in my 77 ..horn wont stop any suggestions? I have it all back apart now and I don't see anything wrong. Any help would be appreciated.
Thanks, Bill
Thanks, Bill
Safety Car
Joined: Sep 2007
Posts: 4,458
Likes: 331
From: Indy Indiana
your horn wire in your column is grounded somewhere... test continuity to ground along various points in the circuit..
the horn circuit is usually OPEN, when you press the contact, it completes a ground.. which sends current thru the horn relay and causes the relay to send current to your horns.. you have that wire going to ground somewhere.. sometimes you may find a plastic insulator is missing, or upside down....
the horn circuit is usually OPEN, when you press the contact, it completes a ground.. which sends current thru the horn relay and causes the relay to send current to your horns.. you have that wire going to ground somewhere.. sometimes you may find a plastic insulator is missing, or upside down....
Racer
Joined: Jul 2007
Posts: 269
Likes: 0
From: WV
I am having the same problem with my 75 and I have not been able to figure it out. I have tried to take it apart and put it back together several times with no luck. I have looked through the parts diagrams in the catalogs and I apear to have everything... So If you can figure it out let me know!
Melting Slicks
Joined: Oct 2005
Posts: 2,114
Likes: 0
From: upstate N.Y.
I had a similar problem on my 76.That was a couple ofyears ago.Seems like it was the contact ring.I had replaced with a new one and the insulator that is sandwiched between the 2 pieces was thinner than original. I took the new one apart and replaced the insulator with the old one .Worked fine ever since.Hope this helps.
Le Mans Master
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
try as 76vette suggested. if the horn sounds with the horn button in place, and doesn't sound with the horn button off, it's the contact ring. try removing the contact ring and the other pieces that complete the circuit if that doesn't help. i had a non-gm contact ring that sounded every time i hit a bump!
Racer
Joined: Jul 2007
Posts: 269
Likes: 0
From: WV
What would you check for if it sounds even with the horn button off? I know my problem is in the colum. Next step is to take everything out to the point where you pull the column and see if the horn still goes off when i put the relay in
Thread Starter
Melting Slicks
Joined: Nov 2005
Posts: 2,297
Likes: 156
From: Clayton New Jersey
try as 76vette suggested. if the horn sounds with the horn button in place, and doesn't sound with the horn button off, it's the contact ring. try removing the contact ring and the other pieces that complete the circuit if that doesn't help. i had a non-gm contact ring that sounded every time i hit a bump!
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Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
Disconnect the long electrical connector on the base of the column.
That will tell you if it is in the column itself.
With it still disconnected,
Connect an ohm meter preferrably one with a buzzer, to the lower shaft at the rag joint, leave other lead to test with.
With your parts explosion handy, and the horn button off the steering wheel, start testing the horn contact rings and spring button etc.
This will test the horn ground circuit.
You can test the horn signal circuit from the turn signal contact to the harmonica plug for a short to ground.
As others have said, probably the contact ring.
That will tell you if it is in the column itself.
With it still disconnected,
Connect an ohm meter preferrably one with a buzzer, to the lower shaft at the rag joint, leave other lead to test with.
With your parts explosion handy, and the horn button off the steering wheel, start testing the horn contact rings and spring button etc.
This will test the horn ground circuit.
You can test the horn signal circuit from the turn signal contact to the harmonica plug for a short to ground.
As others have said, probably the contact ring.
Burning Brakes
Joined: Jun 2008
Posts: 1,086
Likes: 1
From: Michigan
I had a similar problem on my 76.That was a couple ofyears ago.Seems like it was the contact ring.I had replaced with a new one and the insulator that is sandwiched between the 2 pieces was thinner than original. I took the new one apart and replaced the insulator with the old one .Worked fine ever since.Hope this helps.
