No lumbar support
There are several problems that could exist. Firstly I would check the fuses. If all are good, either the knob has quit working, or the motor that increases and decreases the support has gone out. If you can find the positive and negative wires going from the wheel to the motor, you can test it with a voltometer. You would have to have a manual to identify the wires. But if you can, test to see if the knob is sending an electric signal to the motor in the seat. If there is a signal going through, the motor is out. If there is not a signal going out, the knob has probably gone out. Hope this helps.
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