My 03 gmc HD 2500 horn doesn't work but when I put

Wiring in the steering column to the switches in the steering wheel may be compromised, or the switches are possibly faulty and will have to be replaced. This is not a job for the DIYer as there is a real hazard messing with the air bag in the wheel.

Under the steering wheel is a coiled contact drum called the clock spring contact, it is defective.

In relation to these problem there are few solved help links,i suggest you to go through the list and click the required link:-----

Power Steering going out? http://schematicsdiagram.blogspot.in/2012/04/power-steering-going-out.html

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How to Replace power steering pump on Chevy silverado 2500 HD? http://technoanswers.blogspot.in/2012/02/how-to-replace-power-steering-pump-on.html
--------------- How to replace Power steering rack and pinion gear on Chevy Silverado 2500 HD? http://technoanswers.blogspot.in/2012/02/how-to-replace-power-steering-rack-and.html
------------- Power Recirculating Ball Steering Gear removal on Chevy silverado 2500 HD? http://technoanswers.blogspot.in/2012/02/power-recirculating-ball-steering-gear.html
----------- Chevy Silverado 2500 HD steering wheel replacing Procedure? http://technoanswers.blogspot.in/2012/02/chevy-silverado-2500-hd-steering-wheel.html
----------- Steering Wheel Locked? http://schematicsdiagram.blogspot.com/2011/12/steering-wheel-locked.html

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How to Remove Power steering Pressure Hose on Dodge Stratus http://schematicsdiagram.blogspot.com/2011/12/how-to-remove-power-steering-pressure.html

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How to replace power steering pump on Mitsubishi Diamante?

http://howtobyme.blogspot.com/2012/01/how-to-replace-power-steering-pump-on.html

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How to bleed power steering pump on Toyota? http://repairhelpcenter.blogspot.in/2012/02/how-to-bleed-power-steering-pump-on.html

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----------How to replace power steering pump on Toyota Land cruiser?

http://repairhelpcenter.blogspot.in/2012/02/how-to-replace-power-steering-pump-on.html

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Steering service light ON GMC Sierra Denali?

http://technoanswers.blogspot.in/2012/02/steering-service-light-on-gmc-sierra.html

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Steering service light came on 2004 Pontiac Grand Prix

http://technoanswers.blogspot.in/2012/02/on-one-my-pontiac-grand-prix-relatred.html

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Check power steering message on Toyota?

http://schematicsdiagram.blogspot.in/2012/02/check-power-steering-message-on-toyota.html

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How to remove power steering pulley on 2002 Ford Taurus? http://repairhelpcenter.blogspot.in/2012/03/how-to-remove-power-steering-pulley-on.html
---------1992 Ford Aerostar Power steering and Alternator belt routing diagram? http://carbeltrouting.blogspot.com/2011/12/1992-ford-aerostar-power-steering-and.html

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How to replace Power Steering Pump on Acura Car Models?

Also bleeding:

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-power-steering-pump-on.html

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How to replace Steering Linkage on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-steering-linkage-on.html

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How to replace power steering pressure hose on mustang? http://technoanswers.blogspot.in/2012/02/how-to-replace-power-steering-pressure.html

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STEERING SQUEAKS http://alltypesofpartsreplacing.blogspot.com/2012/10/steering-squeaks.html
----------- Steering Column Diagram For 1990 Jeep Wrangler http://schematicsdiagram.blogspot.in/2012/07/steering-column-diagram-for-1990-jeep.html
------------- How to replace Steering Wheel on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-steering-wheel-on-acura.html

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How to replace Power Steering Pump on 1999 Acura TL?

http://howtobyme.blogspot.com/2011/11/how-to-replace-power-steering-pump-on.html

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These details will help.

Thanks.

Sounds like the problem is in the horn pad if it works with the alarm.

THE WHOLE HORN PAD AND AIRBAG IN STEERING WHEEL HAS TO BE REPLACED.BECAUSE HORN PAD BUILT IN THE AIRBAG.IF YOU GOING TO REPLACE AIRBAG IN STEERING WHEEL YOUR SELF. DISARM AIRBAGS BY FIRST TURNING OFF RADIO,THEN REMOVE NEGATIVE BATTERY CABLE,WAIT 20 MINUTES FOR AIRBAGS DISCHARGE.BEFORE REMOVING THE AIRBAG HORN PAD.

You need an ohm meter and check to see if ther is power at the horns and lights. There is no programming that turns off the horn on the steering column. But I have one of these trucks and had the same problem with the lights and horns but it didn't happen at the same time. My lightbulbs burnt out and the actual horns under the bumper did to. Hope this helps.

The horn pad is made of vinyl which contracts through the four seasons causing this problem for some. Remove the horn pad with the battery disconnected first of all. Use a jumper wire to see if the horn works. If id does check the horn relay next. If ok hot wire the horn direct. One should be your problem or it is a broken wire instead

Check the fuses first, the alarm is likely wired in after the fuse for the horn switch on its own fuse. If it is not the fuse it is either the horn switch itself (inside the steering wheel) or the wiring. If the alarm was installed at the factory when the truck was made it is most likely a fuse, then the switch. If the alarm was installed aftermarket it is most likely a fuse, then the wiring where the alarm was spliced into the horn wire, then the switch. Get back to me if this doesn't help.

If the horn works with the alarm button but not with the steering wheel horn pad the problem is most likely in the contacts beneath the steering wheel. This requires pulling the steering wheel and repairing the contacts.
If this vehicle has an air bag in the steering wheel make sure to deactivate the airbag circuit before pulling the steering wheel.

when I had that problem it was the contacts under the steering wheel pull the steering wheel and you will see a copper ring the horn is connected to ground out that copper ring against the steering column if the horn sounds you have a worn contact I fixed mine by putting a spacer under that copper ring good luck with it