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Saab
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2004
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9-3 Linear, Standard
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Repair and Diagnosis
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Quick Lookups
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Electrical Component Locations
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Component Locations
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Technical Description
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Brake light switch (29), TCS/ESP
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Main use
Main use
Brake light information is used by the control module to:
Disengage the cruise control
Limit fuel during idling
Enable diagnosis of the vehicle speed signal.