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Memory Switch Inoperative

  1. Perform MEMORY SEAT SYSTEM CHECK (A45 WITH AL2)  or (A45 WITH AC9) under TROUBLE SHOOTING. Go to next step.
  2. Operate power windows. If power windows operate properly, go to next step. If power windows do not operate properly, see POWER WINDOWS article.
  3. If more than one memory function is operating properly, go to step 8). If no memory functions are operating properly, go to next step.
  4. Check for open in Black/White wire between memory function switch, driver's power window switch and driver's front door module. If circuit is okay, go to next step. If circuit is not okay, go to step 9).
  5. Disconnect memory function switch. Use DVOM to measure resistance between memory switch terminal "E" and each of the following terminals:
    • Terminal "A", depress memory function switch "1" button.
    • Terminal "B", depress memory function switch "2" button.
    • Terminal "C", depress memory function switch MEMORY SET button.

    For terminal identification, see illustration. See Fig 1 . If DVOM indicates less than 5 ohms, go to next step. If DVOM indicates, greater than 5 ohms, go to step 8).

    Fig 1: Identifying Memory Function Switch Terminals
    G98E01841Courtesy of GENERAL MOTORS CORP.
  6. Disconnect driver's power window switch connector. Use DVOM to measure resistance values between memory function switch connector terminals and driver's power window switch connector terminals as follows:
    • Memory switch "A", window switch No. 3 (White wire).
    • Memory switch "B", window switch No. 2 (Purple wire).
    • Memory switch "C", window switch No. 4 (Orange wire).

    If DVOM indicates less than 5 ohms, go to next step. If DVOM indicates greater than 5 ohms, go to step 9).

  7. Replace driver's front power window switch. See DOOR SWITCHES  under REMOVAL & INSTALLATION. After replacement, perform MEMORY SEAT SYSTEM CHECK (A45 WITH AL2)  or MEMORY SEAT SYSTEM CHECK (A45 WITH AC9)  under TROUBLE SHOOTING.
  8. Replace memory function switch. See DOOR SWITCHES  under REMOVAL & INSTALLATION. After replacement, go to MEMORY SEAT SYSTEM CHECK (A45 WITH AL2)  or MEMORY SEAT SYSTEM CHECK (A45 WITH AC9)  under TROUBLE SHOOTING.
  9. Repair open in suspect wire. After repair is complete, go to MEMORY SEAT SYSTEM CHECK (A45 WITH AL2)  or MEMORY SEAT SYSTEM CHECK (A45 WITH AC9)  under TROUBLE SHOOTING.
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