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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1109 (Seating) >> Diagnostic Tests >> Seats >> Pinpoint Tests >> Pinpoint Test E: The Power Seat Does Not Move Horizontally/Vertically >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

When pressed in one of 6 available directions, the seat control switch supplies battery voltage and ground to 1 of 3 power seat track motors through horizontal motor circuits 980 (YE/WH) and 981 (RD/WH), front height motor circuits 979 (RD/LB) and 990 (YE/LB) or rear height motor circuits 982 (YE/LG) and 983 (RD/LG). The seat control switch is normally closed to ground on all 6 of the seat motor circuits, so when one circuit becomes closed to power, the opposite circuit to that motor remains closed to ground. The seat motor will then operate, moving the seat track in the selected direction. Moving the seat control switch in the opposite direction reverses polarity to the seat motor, which causes the seat motor to move the seat track in the opposite direction.

This pinpoint test is intended to diagnose the following:

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