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.
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HOMESERVICE MANUALSFORD1992RANGER 2D PICKUP, 2.9 T, STANDARDREPAIR AND DIAGNOSISBODY & FRAMEPOWER SEATSSYSTEM TESTSTEST F: ONE LUMBAR SEAT DOES NOT OPERATE
1992 Ford Ranger 2D Pickup, 2.9 T, Standard
Test F: One Lumbar Seat Does Not Operate
1992 Ford Ranger 2D Pickup, 2.9 T, StandardSECTION Test F: One Lumbar Seat Does Not Operate
- Inspect for no battery voltage at lumbar seat switch. See WIRING DIAGRAMS . If problem is found, repair and retest system. If problem is not found, go to next step.
- Inspect for continuity to ground at (Black) wire at inoperative lumbar seat pump motor. See WIRING DIAGRAMS . If problem is found, repair and retest system. If problem is not found, go to next step.
- Inspect for inoperative lumbar seat switch. If problem is found, replace switch. If problem is not found, go to next step.
- Inspect for inoperative lumbar seat pump motor. If problem is found, replace lumbar seat pump motor. See LUMBAR SUPPORT COMPRESSOR under REMOVAL & INSTALLATION. If problem is not found, go to next step.
- Inspect for open in Black/White (Aerostar and Ranger) wire or Dark Green wire (Explorer) at lumbar seat pump motor. See WIRING DIAGRAMS . If problem is found, repair and retest system.
RENDER: 1.0x
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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.