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 B: SOME, BUT NOT ALL SEAT FUNCTIONS INOPERATIVE
1993 Cadillac DeVille Base, 4D Sedan
Test B: Some, But Not All Seat Functions Inoperative
1993 Cadillac DeVille Base, 4D SedanSECTION Test B: Some, But Not All Seat Functions Inoperative
- Connect the Jumper Seat Memory Module Diagnostic Connector to ground, the module should beep.
- Operate all of the seat switch functions that do not work. Fig 1 . If the module beeps every time a switch function is actuated, go to the next step. If the module does not beep every time a switch function is actuated, go to MODULE DOES NOT BEEP EVERY TIME SWITCH FUNCTION ACTUATED .
- If 2 seat switch functions do not operate (i.e. front height does not move up or down), go to step 5 . If there is not 2 inoperative seat switch functions, go to the next step.
- Repair the short to ground on the circuit of the affected motor.
- Disconnect the affected motor and jumper battery and ground to motor terminals. If the motor turns, go to the next step. If the motor does not turn, replace the motor.
- Check the wiring to the Seat Memory Module for an open. If the wiring is OK, replace the Seat Memory Module. See MEMORY SEAT MODULE (FISHER SYSTEM) under REMOVAL & INSTALLATION.
MODULE DOES NOT BEEP EVERY TIME SWITCH FUNCTION ACTUATED
| Seat Switch Function | (1) Connector C2 Pin | ||
|---|---|---|---|
| Rear Height Up | D16 | ||
| Rear Height Down | C15 | ||
| Front Height Up | D15 | ||
| Front Height Down | C14 | ||
| Entire Seat Forward | D14 | ||
| Entire Seat Back | C7 | ||
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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.