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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1019 (Instrument Cluster And Panel Illumination) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test E: The Door Lock Control Switch Illumination is Inoperative >> Pinpoint Test E: The Door Lock Control Switch Illumination Is Inoperative

Pinpoint Test E: The Door Lock Control Switch Illumination Is Inoperative

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. E1 CHECK THE OPERATION OF THE DOOR LOCK SWITCH 
    • Operate the door locks from the suspect door lock switch.
    • Do the door locks operate? 
    1. YES  : Go to  E2 .
    2. NO  : REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS article.
  2. E2 CHECK CIRCUIT CBP41 (BU) FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Suspect door switch
    • Key in ON position.
    • Measure the voltage between the drivers door lock control switch C505-3, or the passenger door lock control switch C605-3 circuit CBP41 (BU), harness side and ground.
      • Fig 1: Measuring Voltage
      GF0042633Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new door lock control switch. REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS article. TEST the system for normal operation.
    2. NO  : REPAIR the circuit for an open.
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