Operation CHARM
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Buick
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2000
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Regal V6-3.8L SC VIN 1
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Repair and Diagnosis
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Accessories and Optional Equipment
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Radio, Stereo, and Compact Disc
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Description and Operation
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Steering Wheel Controls
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Circuit Description
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Supplemental Inflatable Restraint (SIR) Coil Assembly
Supplemental Inflatable Restraint (SIR) Coil Assembly
The SIR coil assembly contains 4 wires used by the steering wheel controls. This allows voltage to be applied by the
steering wheel
switches to the radio while the steering wheel is being turned.