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Q:

horn does not work when pressed on, but will blow when set the door locks on 2002 Chevrolet Trailblazer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
does blow when doors are locked withe the remote
(1) Answer
Air bag light on? Any other steering wheel mounted componets not working? Possible clock spring.