FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
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Car repair manuals for everyone.
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Mercury
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1999
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Grand Marquis V8-4.6L VIN W
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Repair and Diagnosis
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Powertrain Management
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Transmission Control Systems
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Lamps and Indicators - Transmission and Drivetrain
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Lamps and Indicators - A/T
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Overdrive Indicator Lamp
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Description and Operation
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Conventional
Conventional
The overdrive off (O/D OFF) indicator has dual functions. The O/D OFF indicator illuminates when the overdrive is turned off. The O/D OFF indicator also illuminates if a fault is detected in the automatic transmission.