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Test 14: Lumbar Support Inoperative - Without A45

  1. Perform LUMBAR SUPPORT SYSTEM CHECK - WITHOUT A45  under TROUBLE SHOOTING. Go to next step.
  2. Disconnect lumbar switch connector. Measure voltage between ground and lumbar switch connector terminal "G" (Orange wire). See Fig 1 . If voltage is 9-16 volts, go to next step. If voltage is not 9-16 volts, go to step  5 .
    Fig 1: Identifying Lumbar Switch Connector Terminals
    G98F01851Courtesy of GENERAL MOTORS CORP.
  3. Measure voltage between lumbar switch connector terminals "G" (Orange wire) and "E" (Black wire). If voltage is 9-16 volts, go to next step. If voltage is not 9-16 volts, go to step  6 .
  4. Check lumbar switch connector for poor connections. If problem is found, repair as necessary, then go to step  8 . If problem is not found, go to step  7 .
  5. Repair open in Orange wire between lumbar switch and rear junction block. After repairs, go to step  8 .
  6. Repair open in Black wire between lumbar switch and ground. After repairs, go to step  8 .
  7. Replace lumbar switch. See POWER SEAT SWITCHES under REMOVAL & INSTALLATION in POWER SEATS - SEVILLE article. After repairs, go to next step.
  8. Operate system to verify repair. If system operates normally, repair is complete. If system does not operate normally, return to step  2 .
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