2003 GMC SONOMA
33,400 MILES
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ROBERT CARR
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  • 1 POST
my horn does not work when i press horn pad on the steering wheel but it sounds when i press the security button on mt key pad
Dec 26, 2012 at 4:56 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Usually the problem is the wiring in the steering column. Disarm the airbag before working on anything. Give me a second and I will post the horn wiring diagram.
Dec 26, 2012 at 4:59 PM
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
The horn button is a ground for the coil side of horn relay. Click on the link for wiring.

http://postimage.org/image/j3lqwp9jr/
Dec 26, 2012 at 5:05 PM