B1762

Step 1: Perform visual inspection of the driver's seat wiring harness, particularly where it flexes near the seat tracks. Look for pinched, chafed, or broken wires and check all connectors for corrosion, water intrusion, or pushed-out pins.

Step 2: Using a digital multimeter, check for continuity in the seat down motor circuit from the control module connector to the motor connector with the harness disconnected. Expected reading should be less than 5 ohms for intact wiring.

Step 3: With ignition on and seat switch activated to the down position, backprobe the motor connector and verify voltage supply (typically 12V) is reaching the motor from the control module. No voltage indicates control module or switch issue; voltage present indicates motor failure.

Step 4: Test the seat height motor directly by applying 12V power and ground from a battery source to verify motor operation. Motor should activate smoothly; no movement confirms motor replacement needed.

Step 5: If wiring and motor test good, verify proper ground circuit continuity at the motor and check for voltage at the seat control switch during operation to isolate switch failure.

Step 6: After repair, clear codes, cycle the seat through full range of motion multiple times, and verify code does not return and seat operates smoothly in all directions.