Test I: The Power Lumbar Is Inoperative

PINPOINT TEST I: THE POWER LUMBAR IS INOPERATIVE

I1:

I2-I4:

I4-I5:

Normal Operation
The lumbar control switch is powered by battery voltage on circuit 566 (DG) and is supplied ground on circuit 1205 (BK). When the knob of the lumbar control switch is pressed, voltage and ground are supplied to the power lumbar motor. When pressing the lumbar knob in the opposite direction, the lumbar control switch reverses the polarity to the power lumbar motor, which moves the lumbar mechanism in the opposite direction.

Possible Causes
An inoperative power lumbar can be caused by:
- wiring, terminals or connectors.
- a faulty lumbar control switch.
- a faulty power lumbar motor assembly.