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Test 90A - Both Doors Fail To Lock & Unlock From One Switch

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagrams, see WIRING DIAGRAMS - 3.0L article in ENGINE PERFORMANCE. Perform TEST VER-1 after each repair.
  1. Turn ignition off. Gain access to inoperative door lock switch. Disconnect door lock switch connector. Using scan tool in voltmeter mode, check voltage on door lock switch connector terminal No. 3 (Red wire). If voltage is less than 10 volts, repair open Red wire. If voltage is more than 10 volts, go to next step.
  2. Check voltage on door lock switch connector terminal No. 1 (Orange/Violet wire). Depress door lock switch to LOCK position on opposite door. If voltage is less than 9 volts when switch is pressed, repair open Orange/Violet wire. If voltage is more than 9 volts when switch is pressed, go to next step.
  3. Check voltage on door lock switch connector terminal No. 3 (Pink/Violet wire). Depress door lock switch to UNLOCK position on opposite door. If voltage is less than 9 volts when switch is pressed, repair open Pink/Violet wire. If voltage is more than 9 volts when switch is pressed, replace inoperative door lock switch.
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