Operation CHARM
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Oldsmobile
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1999
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Alero V6-3.4L VIN E
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Relays and Modules - Computers and Control Systems
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Engine Control Module
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Diagnostic Aids
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General Electrical Diagnostic Procedures
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Symptom Diagnostic Example
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Perform the System Check
Perform the System Check
The system check indicates that the low beam headlamps operate when the high beam switch is in high. Also, the high beam indicator illuminates but neither high beam headlamp operates.