Operation CHARM
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Ford
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2007
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Focus L4-2.0L VIN N
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Repair and Diagnosis
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Lighting and Horns
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Headlamp
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Testing and Inspection
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Initial Inspection and Diagnostic Overview
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Stoplamps
Stoplamps
PRINCIPLES OF OPERATION
When the brake pedal is applied, the stoplamp switch routes voltage to the generic electronic module (GEM) and the high mounted stoplamp. The GEM then supplies voltage to the rear lamps.