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 MANUALSCADILLAC1993DEVILLE BASE, 4D SEDANREPAIR AND DIAGNOSISBODY & FRAMESEATS - POWER MEMORYSYSTEM TESTSTEST I: ONE OR MORE BUT NOT ALL PNEUMATIC SEAT FUNCTIONS DO NOT OPERATE
1993 Cadillac DeVille Base, 4D Sedan
Test I: One Or More But Not All Pneumatic Seat Functions Do Not Operate
1993 Cadillac DeVille Base, 4D SedanSECTION Test I: One Or More But Not All Pneumatic Seat Functions Do Not Operate
- Measure voltage at the suspect disconnected Seat Solenoid/Valve Assembly Connector.
- Operate the control switch to INFLATE and DEFLATE.
- Measure battery voltage between Seat Solenoid/Valve Assembly Connector corresponding terminal and ground. See WIRING DIAGRAMS . If voltage is not as specified, check the suspect wire for an open or a short to ground. If OK, replace the Seat Control Assembly.
- If battery voltage is present, replace the Seat Solenoid/Valve Assembly.
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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.