Question about 2003 GMC Envoy
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Posted on Jan 02, 2017
the horn relay is located underneath the hood close to the fire wall on the passenger side in a black box with a diagram on it..if the does'nt work try checking the wire under neath the steering wheel cover..
Posted on Dec 02, 2008
Usually the wire from the steering wheel is Green w/Red and the wire to the horn from the fuse box is White. There is only one fuse, sometimes shared with the emergency lights. Check to see if there is power to the horn itself with a volt meter.
Posted on Dec 30, 2008
had same problem on my XUV. changed the blower motor resistor, located under passenger side dash. easy to change, works no problem.
Posted on Feb 17, 2009
SOURCE: horn does not work
check B+ in the horn pin and check the ground on the horn if there is B+ and B- just change the horn if there is no B+ on the horn conector replace the relay .
B+ = battrey power
B- = battrey ground
Posted on Mar 14, 2009
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