Horn Problem - Team Camaro Tech
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post #1 of 4 (permalink) Old Jan 7th, 06, 12:16 PM Thread Starter
 
Join Date: Jan 2005
Posts: 84
Horn Problem

1967 Camaro-- Horns fail to work. I can run a test wire off the batt and they blow. Hook up the wire and nothing. Car has new horns, relay, and horn kit. Tried to ground the black wire in the column that grounds the horn from the button and I get sparks. Any thoughts on how to identify the problem. Thanks so much for all your help. I am new here and you guys have been great!
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post #2 of 4 (permalink) Old Jan 7th, 06, 02:43 PM
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Jim
 
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Location: Yorkville, Illinois USA
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Re: Horn Problem

if by "ground the black wire...that blows the horns" you mean if you pull the horn button off and touch the black wire to the column, you may have a bad ground on the column. It's trying (sparks) but the resistance isn't low enough to actuall trip the relay.

Try these 2 tests:
Take a peice if wire, attach one end to a good ground, and stick the other in the connector for the black wire on the horn relay. The horn should blow. If it don't, you may have it on the wrong terminal, there are 2 together on the "OUTBOARD" side of the horn relay. The Black wire from the horn button pugs into the one closest to the rad support, the green wire from the horn plugs into the the one furthest away. 68-69 relays have a thrird donnection, nearest the radiator, this is for the pink w/bk strip wire for the door buzzer.

If the horns blew, take your wire inside, connect one end to a screw into the bottom of the dash, and touch the black wire to it. If the horns blow, you have a grounding problem with the steering column. The column is supposed to ground thru a small metal strap in the ragjoint, where it connects to the steering box. It's even possible the entire subframe has no ground path, as the horn is the only thing that needs to pull a ground thru the sub, and the sub is rubber mounted.

If you have a voltmeter, connect the black lead to a good ground on the metal dash, the red lead to the black horn wire, you will read 12 volts. Ground both to the column. You should read ZERO volts if the column's ground is good.





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post #3 of 4 (permalink) Old Jan 7th, 06, 03:01 PM
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Join Date: Jan 2004
Location: Saginaw, Michigan
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Re: Horn Problem

If your problem is not having a good ground from the steering column, you could try to just jumping across the flexible coupling with a wire to see if that corrects the problem.

As mentioned above, the original design flexible coupling had a small wire or a brass grounding strap right in the center (quite difficult to see with the flex coupling in place). Later flexible couplings had a fine wire screen molded into the rubber disc to provide the same electrical grounding path through the coupling.

Flexible coupling rebuild "kits" don't supply any means for a ground path. The rubber disc doesn't have a screen and they don't supply any wire or grounding strap.

If all indications are that the steering column needs a path to ground, you could try just jumping directly from the steering column jacket to a known ground in the dash. With all the plastic, paint, etc in the column, this might or might not work. Otherwise, you probably will need to purchase an OEM style flexible coupling.

JIML82
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post #4 of 4 (permalink) Old Jan 8th, 06, 04:34 AM Thread Starter
 
Join Date: Jan 2005
Posts: 84
Re: Horn Problem

Horns blow! The wires on the relay were reveresed. Both my wires are black in my harness and look the same. This turned out to be an easy fix less the replacement of a few parts that the car really needed anyway. Thanks for your help.
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