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 MANUALSMERCURY1989GRAND MARQUIS GSREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMESEATS - POWERTESTINGPROGRAMMABLE SEAT CONTROL SWITCH TEST
1989 Mercury Grand Marquis GS
Programmable Seat Control Switch Test
1989 Mercury Grand Marquis GSSECTION Programmable Seat Control Switch Test
- With "1" button pressed, continuity should be present between terminals No. 1 and No. 2. With "2" button pressed, continuity should be present between terminals No. 1 and No. 3. With "SET" button pressed, continuity should be present between terminals No. 1 and No. 4.
- To test the LED in "SET" switch, ground terminal No. 5 and connect terminal No. 6 to battery positive. The LED should glow. Refer to the PROGRAMMABLE SEAT SWITCH CONNECTOR FUNCTION table. Also, See Fig 1 .
PROGRAMMABLE SEAT SWITCH CONNECTOR FUNCTION
| Pin No. | Wire Color | Function |
|---|---|---|
| 1 | PPL/WHT | LED Drive |
| 2 | BRN/LT. GRN | LED Return |
| 3 | BLK/ORN | Set Button |
| 4 | BRN/ORN | Pos. 2 Button |
| 5 | LT. GRN/WHT | Pos. 1 Button |
| 6 | WHT/ORG | Common |
RENDER: 1.0x
NO RELATED
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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.