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Home >> Mercury >> 2006 >> Grand Marquis V8-4.6L VIN W >> Repair and Diagnosis >> Steering and Suspension >> Steering >> Steering Column >> Testing and Inspection >> Pinpoint Tests >> Test D: The Multi-Function Switch Does Not Operate Correctly

Test D: The Multi-Function Switch Does Not Operate Correctly

Pinpoint Test D: The Multi-Function Switch Does Not Operate Correctly

Normal Operation
The multi-function switch controls the various components electrically. The headlamp switch sends constant voltage to the headlamps when placed in the ON position, while the flash-to-pass is a momentary switch used to send voltage to the headlamp high beams only. The headlamp high beam/low beam switch sends voltage to the low or high beam headlamps while the headlamps are on. The turn signal switch portion of the multi-function switch operates the left and right turn signals. The windshield wiper switch function uses a ground signal to activate the various wiper modes and the wiper/washer.

Possible Causes
^ Multi-function switch

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D3-D4:




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