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Left Lumbar Support Does Not Manually Move In Any Direction

  1. If diagnostic system check was performed, go to next step. If diagnostic system check was not performed, go to DIAGNOSTIC SYSTEM CHECK  .
  2. 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 reading is about 12 volts, go to next step. If reading is not about 12 volts, go to step 5).
  3. Disconnect left lumbar switch connector. Check voltage between MSM harness connector C2 terminal "D" (Orange wire) and left lumbar switch harness connector terminal "E" (Black wire). If reading is about 12 volts, go to next step. If reading is not about 12 volts, go to step 6).
  4. Replace left lumbar switch. See appropriate POWER SEATS article. Perform DIAGNOSTIC SYSTEM CHECK  .
  5. Repair open in circuit No. 850 (Black wire) between MSM and ground. Perform DIAGNOSTIC SYSTEM CHECK  .
  6. Repair open in circuit No. 850 (Black wire) between left lumbar switch and ground. Perform DIAGNOSTIC SYSTEM CHECK  .
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