Question about 2007 GMC Sierra 3500HD

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Where does horn circuit get power from in a 2004 gmc sierra

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There are certain power pins , details of which u can see in the manual. through those pins power comes to the horn circuit in a gmc sierra.

Posted on Jan 06, 2011

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There is a relay for it. Pin# 30 is power and pin # 87 goes to the horn, and pin #85 is power and pin #86 comes from the steering column.

Posted on Nov 13, 2010

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Thank you for using fixya and be safe.
http://www.compnine.com/index.php?u=1&year=2004&artnbr=TC02-666&artsfx=NULL&supplgroup=NULL&catcode=56C&modelcode=C&makecode=LG&modelseries=NULL&uid=1&modelid=7036&capuid=1&majorgroup=02&grouptype=B

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