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| | | Joined: Dec 2009 Posts: 15 New Guy | | New Guy Joined: Dec 2009 Posts: 15 | Hello from England,
I have been getting my truck ready for inspection, and the horn doesn't work.
My question is;
When I take the cover off the centre of the steering wheel - there are no sign of any electrics anywhere?
I have a horn mounted behind the grille, and the wires all appear to be there from the horn to the relay - but there doesn't appear to be any way to make it work.
Any ideas,
Laine
Last edited by laine snook; 02/21/2010 4:51 PM.
| | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | I am assuming that your setup is the same as the AD trucks. There should be some type of contact mechanism in the top of steering wheel. A wire should run down the inside of the column to about half way where it exits through the side. I think the factory assembly manual should show the details. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | The 55-1st Chevrolet truck is an A-D (Advance-Design) truck. The horn contact spring and button was/is the same for many years (47-66). As truckernix stated, there is one wire running through the steering column to the horn relay (and then to the horn). The horn button completes the electrical circuit when the grounded contact plate under the horn button touches the horn contact button (the plate in the photo is a 54/55-1st plate). | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Laine,
The horn relay should have three terminal/wire connections. A large gauge wire from the trucks battery, a large gauge wire from relay to horn and the smaller gauge wire that runs up the inner steering column to the horn button.
If you use a short piece of wire and ground the relay terminal that goes to the horn button you should hear the horn toot or should hear the relay click.
If doing this makes the horn blow it indicates a problem in the horn button or its wiring. If the relay clicks but no toot, it means the horn is bad or relay contacts for the horn are defective.
If the horn doesn't toot and the relay doesn't click it means the relay is bad.
All this monkey motion is intended to focus your troubleshooting on either the horn button OR the horn/relay combination. It will tell you which item to explore further.
You must have battery power to the relay...have you checked with a meter or test light!
Does this make any sense!
Stuart | | |
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