Operation CHARM
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GMC Truck
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1992
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Yukon V8-393 6.5L DSL Turbo
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Repair and Diagnosis
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Lighting and Horns
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Horn
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Description and Operation
Horn: Description and Operation
When the
Horn
Button is depressed, one side of the coil of the
Horn Relay
is grounded. The relay is energized. Its contacts close and battery voltage is supplied to the Horns.