Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1999EXPEDITION 2WD V8-4.6L SOHC VIN 6REPAIR AND DIAGNOSISBODY AND FRAMESEATSPOWER SEAT CONTROL MODULEDESCRIPTION AND OPERATION
1999 Ford Expedition 2WD V8-4.6L SOHC VIN 6
Power Seat Control Module: Description and Operation
1999 Ford Expedition 2WD V8-4.6L SOHC VIN 6SECTION Description and Operation
The power driver seat and power outside rear view mirrors are controlled by the Driver Seat Module (DSM) only when the vehicle is equipped with the programmable/recall memory option.
The DSM system consists of the following components.
^ Driver seat module.
^ Driver memory seat switch.
^ Memory mirror switch.
^ Memory set switch.
^ Front vertical seat motor.
^ Rear vertical seat motor.
^ Driver horizontal memory mirror.
^ LH heated memory mirror.
^ RH heated memory mirror.
^ Remote entry key fob.
The DSM system consists of the following components.
^ Driver seat module.
^ Driver memory seat switch.
^ Memory mirror switch.
^ Memory set switch.
^ Front vertical seat motor.
^ Rear vertical seat motor.
^ Driver horizontal memory mirror.
^ LH heated memory mirror.
^ RH heated memory mirror.
^ Remote entry key fob.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.