Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Lumbar Support System Operation
Lumbar pump operation is controlled through relays in the lumbar module. Battery positive voltage from the instrument panel electrical center is supplied to the lumbar module and is used for pump operation. Battery positive voltage from the instrument panel electrical center is supplied to the lumbar control switches and is used to energize the relay coils. When a lumbar switch is pressed voltage is supplied to the control circuit which supplies the inflate or deflate relay coil and the pressure switch relay coil. Either the inflate or deflate relay along with the pressure switch relay must be energized in order for pump operation to occur. The lumbar control circuits are also used to control valves in the air lines from the lumbar pump to the seat lumbar and side bladders.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.