Question about 1999 GMC Sierra

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99 GMC the horn started sounding Steady with no one in the truck

The horn started sounding last night by it's shelf

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This is caused by temp change, it is the horn pad.

Posted on Dec 17, 2008

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Posted on Jan 02, 2017

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1 Answer

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Diagram courtesy of Autozone.com
From the relay, green goes to the horns, black to the horn pad on the steering wheel, and orange to the fuse box.
24a39248-3e44-40bd-9bda-28bf6498945d.gif

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