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 S: SEAT RECLINING FUNCTIONS OPERATE FOR ONE SEAT ONLY
1993 Cadillac DeVille Base, 4D Sedan
Test S: Seat Reclining Functions Operate For One Seat Only
1993 Cadillac DeVille Base, 4D SedanSECTION Test S: Seat Reclining Functions Operate For One Seat Only
- Measure voltage at the suspect connected Recliner Switch.
- Measure battery voltage between Recliner Switch terminal A (ORN/BLK) and ground. See WIRING DIAGRAMS . If the voltage is not as specified, check/repair the ORN/BLK (60) wire for an open. Check the in-line connectors for proper terminal contact. See TERMINAL CONTACT CHECK under TROUBLESHOOTING.
- Measure battery voltage between Recliner Switch terminals A (ORN/BLK) and E (BLK). If the voltage is not as specified, check/repair the BLK (151) and (152 or 154) wires for an open. Check the in-line connectors for proper terminal contact. See TERMINAL CONTACT CHECK under TROUBLESHOOTING.
- Measure battery voltage between Recliner Switch terminals A (ORN/BLK) and B (BLK). If the voltage is not as specified, check/repair the BLK (151) and (152 or 154) wires for an open. Check the in-line connectors for proper terminal contact. See TERMINAL CONTACT CHECK under TROUBLESHOOTING.
- Operate the Recliner Switch to FWD and RECLINE and hold.
- Measure the battery voltage between Recliner Switch terminals D (LT BLU) and C (LT GRN). If the voltage is not as specified, check the wiring to the suspect Recliner Motor for a short to ground. If OK, replace the Recliner Switch. See POWER RECLINER SWITCH under REMOVAL & INSTALLATION.
- If all of the voltages are correct, check the wiring to the suspect Recliner Motor for an open. If OK, replace the suspect Recliner Motor. See POWER RECLINER MOTOR under REMOVAL & INSTALLATION.
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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.