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.
1998 Cadillac Eldorado BaseFACTORY OEM SERVICE PROCEDURE
Left Seat Does Not Manually Move In Any Direction
NOTE:
After repair or component replacement is completed, perform MEMORY SYSTEM CHECK
under TESTING - SYSTEM CHECKS to verify system is operating properly.
- Perform MEMORY SYSTEM CHECK under TESTING - SYSTEM CHECKS. Go to next step.
- Disconnect MSM Light Green, 6-pin connector C2. Using DVOM, check voltage between MSM harness connector C2, terminals "D" (Orange wire) and "C" (Black wire). If 10-15 volts exists, go to next step. If 10-15 volts does not exist, go to step 5).
- Disconnect left seat switch Black, 12-pin connector. Check voltage between MSM harness connector C2, terminal "D" (Orange wire) and left seat switch harness connector terminal "H" (Black wire). If 10-15 volts exists, go to next step. If 10-15 volts does not exist, go to step 6).
- Replace left seat switch. See SEATS - POWER article.
- Repair open in circuit No. 850 (Black wire) between MSM and splice S351.
- Repair open in circuit No. 850 (Black wire) between left seat switch and splice S351.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.