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.
1999 Cadillac Seville SLSFACTORY OEM SERVICE PROCEDURE
Power Mirror Memory Inoperative In One Direction
- If outside mirror system check was performed, go to next step. If outside mirror system check was not performed, go to OUTSIDE MIRROR SYSTEM CHECK under SYSTEM TESTS.
- Check for open or short in position sensor wiring between appropriate door control module and appropriate outside power mirror:
- Left Horizontal
circuit No. 786 (Light Blue/Black wire). - Left Vertical
circuit No. 784 (Dark Green/Black wire). - Right Horizontal
circuit No. 786 (Light Blue/Black wire). - Right Vertical
circuit No. 784 (Dark Green/Black wire).
If circuit is okay, go to next step. If faulty circuit is found, go to step 4 .
- Left Horizontal
- Replace suspect mirror. See POWER MIRRORS - SEVILLE article. After repairs, recheck system operation.
- Repair open or short in faulty wiring. See WIRING DIAGRAMS . After repairs, recheck system operation.
Factory Service Tools
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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.