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All Locks Inoperative From Driver Door Lock Switch

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS. Unless instructed otherwise in test step, reconnect any disconnected connectors.
  1. Turn ignition off. Disconnect driver door lock switch connector. Turn ignition on. Using a voltmeter, check voltage on driver door lock switch connector terminal No. 2, driver door switch MUX circuit (Light Green wire). See Fig 1. If voltage is more than 4.5 volts, leave driver door lock switch connector disconnected and go to next step. If voltage is 4.5 volts or less, leave driver door lock switch connector disconnected and go to step  4.
    Fig 1: Identifying Driver Door Lock Switch Connector Terminals
    G00012678Courtesy of DAIMLERCHRYSLER CORP.
  2. Turn ignition off. Using an ohmmeter, check resistance between ground and driver door lock switch connector terminal No. 3, ground circuit (Black or Black/Yellow wire). If resistance is less than 5 ohms, leave driver door lock switch connector disconnected and go to next step. If resistance is 5 ohms or more, repair open Black or Black/Yellow wire.
  3. Ensure ignition is off. Disconnect Remote Keyless Entry (RKE) module connector. Using ohmmeter, check resistance of driver door switch MUX circuit (Light Green wire) between RKE module connector terminal No. 10 and driver door lock switch connector terminal No. 2. See Figure. If resistance is less than 5 ohms, replace driver door lock switch. If resistance is 5 ohms or more, repair open Light Green wire.
  4. Turn ignition off. Using an ohmmeter, check resistance between ground and driver door lock switch connector terminal No. 3, ground circuit (Black or Black/Yellow wire). If resistance is less than 5 ohms, leave driver door lock switch connector disconnected and go to next step. If resistance is 5 ohms or more, repair open Black or Black/Yellow wire.
  5. Ensure ignition is off. Disconnect Remote Keyless Entry (RKE) module connector. Using ohmmeter, check resistance of driver door switch MUX circuit (Light Green wire) between RKE module connector terminal No. 10 and driver door lock switch connector terminal No. 2. See Figure. If resistance is less than 5 ohms, replace RKE module. See REMOTE KEYLESS ENTRY (RKE) MODULE  under REMOVAL & INSTALLATION. If resistance is 5 ohms or more, repair open Light Green wire.
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