Pinpoint Test B : The Power Seat Is Inoperative - Driver, With Manual Recliner: Notes

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Power Seats , for schematic and connector information.

Normal Operation

The driver seat control switch is powered by battery voltage on circuit SBB74 (YE/RD) and is supplied ground on circuit GD143 (BK/VT). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new seat track motor needs to be installed, it is necessary to install an entire power seat track.

This pinpoint test is intended to diagnose the following:

Fuse
Wiring, terminals or connectors
Seat control switch