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1995 GMC Suburban - Horn won't blow - 2500 - 6.5 Diesel

Have checked system, fuses good, horn relay is good. I can jump across the horn relay and blow the horn. When horn is activated from the steering wheel I get no current across the horn relay. Do I need to pull the airbag and if so how does one do this?

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There's not much to the horn circuit. You must have removed the HORN/DM fuse 2 in the fuse block to get it to stop. The steering wheel horn switches ground the horn relay coil, causing a contact to close and blow the horns. Those horn switches could have failed or the rotary connection could have failed, causing a sneak grounding of the relay. The relay could have failed in the closed position.

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