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Left Seat Does Not Manually Move In Any Direction

NOTE: After repair or component replacement is completed, perform appropriate MEMORY SYSTEM CHECK under TROUBLE SHOOTING  to verify system is functioning properly.
  1. Perform POWER SEAT MEMORY SYSTEM CHECK  under TROUBLE SHOOTING. Go to next step.
  2. Turn ignition switch to OFF position. Connect fused jumper to ground and memory seat/mirror diagnostic connector, located under driver's seat. Memory seat/mirror module will chime once to indicate Mode 1 has been entered. Operate driver's seat switch in all positions. Memory seat/mirror module should chime once at each switch input. If any seat switch positions caused memory seat/mirror module chime to sound, go to next step. If any seat switch position did not cause memory seat/mirror module to sound, go to LEFT SEAT DOES NOT MANUALLY MOVE IN ONE DIRECTION  and diagnose each suspect switch individually.
  3. Disconnect left seat switch Gray, 12-pin connector. Using DVOM, check voltage between left seat switch harness connector terminal "B" (Orange/Black wire) and ground. See Fig 1 . If 10-15 volts exists, go to next step. If 10-15 volts does not exist, go to step 8).
  4. Using DVOM, check voltage between left seat switch harness connector terminals "B" (Orange/Black wire) and "D" (Black wire). If 10-15 volts exists, go to next step. If 10-15 volts does not exist, go tostep 9).
  5. Briefly connect fused jumper wire between left seat switch harness connector terminals "B" (Orange/Black wire) and "L" (Tan wire) If left seat moves forward, go to step 7). If left seat does not move forward, go to next step.
  6. Replace memory seat/mirror module. See MEMORY SEAT/MIRROR MODULE  under REMOVAL & INSTALLATION. Recheck system operation.
  7. Replace left seat switch. See POWER SWITCHES  under REMOVAL & INSTALLATION. Recheck system operation.
  8. Repair open or short to ground in Orange/Black wire between left seat switch and slice S211. Recheck system operation.
  9. Repair open in Black wire between left seat switch and ground. Recheck system operation.
    Fig 1: Identifying Left Seat Switch Connector Terminals
    G98B01731Courtesy of GENERAL MOTORS CORP.
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