Operation CHARM
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Buick
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1988
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Riviera V6-231 3.8L VIN C SFI
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Repair and Diagnosis
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Diagrams
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Electrical Diagrams
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Powertrain Management
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System Diagram
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Body Control Module (BCM)
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Part 1 of 4
Part 1 of 4
BCM Schematic (1 Of 4):
1D12
= Courtesy
Relay
1D13
= RAP Relays
2B7
= Parklamps On
1D11
= HI/LO Beam
1D9
= Twilight Relays
1D6
= Headlamps On
1D5
= Telephone Status