Operation CHARM
: Car repair manuals for everyone.
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Buick
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1999
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Park Avenue V6-3.8L VIN K
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Repair and Diagnosis
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Relays and Modules
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Relays and Modules - Powertrain Management
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Relays and Modules - Computers and Control Systems
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Body Control Module
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Description and Operation
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SBM Input/Output Information
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Retained Accessory Power
Retained Accessory Power
The SBM provides a
Retained Accessory Power
(RAP)
function. The RAP function allows certain vehicle systems to operate after the vehicle ignition is switched off. The RAP function is also known as a delayed accessory bus.