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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1396 (Instrument Cluster Illumination & Instrument Panel Illumination) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test C: One Or More (But Not All) Individual Dimmable Illumination Sources Are Inoperative >> Pinpoint Test C: One Or More (But Not All) Individual DIMMABLE Illumination Sources Are Inoperative

Pinpoint Test C: One Or More (But Not All) Individual DIMMABLE Illumination Sources Are Inoperative

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. C1 CHECK THE VOLTAGE TO THE INOPERATIVE ILLUMINATION SOURCE 
    • Key in OFF position.
    • Disconnect: Inoperative Illumination Source
    • With the parking lamps on, rotate the instrument panel dimmer switch to the full illumination position.
    • Measure the voltage between the inoperative illumination source, harness side and ground as follows:
      Component Connector-Pin Circuit
      Floor shifter (Fusion, Milan) C3245-3 CLN04 (BU/BN)
      Floor shifter (MKZ) C3245-3 VLN04 (VT/GY)
      Heating ventilation air conditioning (HVAC) module - electronic manual temperature control (EMTC) C2357a-2 VLN04 (VT/GY)
      Memory set switch C503-3 VLN04 (VT/GY)
      Headlamp switch C205-5 VLN04 (VT/GY)
      Clock (Fusion, Milan) C2016-2 CLN04 (BU/BN)
      Clock (MKZ) C2016-2 VLN04 (VT/GY)
      Message center switch C253-1 VLN04 (VT/GY)
      Hazard/passenger air bag disable/traction switch C2355-6 VLN04 (VT/GY)
      Deck lid release switch C2269-3 VLN04 (VT/GY)
      LH front window adjust switch (MKZ) C535a-6 VLN04 (VT/GY)
      RH front window adjust switch (MKZ) C624-1 VLN04 (VT/GY)
      LH rear window adjust switch (MKZ) C701-4 VLN04 (VT/GY)
      RH rear window adjust switch (MKZ) C819-4 VLN04 (VT/GY)
      LH door lock control switch C505-2 VLN04 (VT/GY)
      RH door lock control switch C605-2 VLN04 (VT/GY)
    • Is the voltage greater than 10 volts? 
    1. YES  : For the LH or RH rear window adjust switch, INSTALL a new switch for the inoperative component. TEST the system for normal operation.

      For all other components, go to  C2.

    2. NO  : REPAIR the circuit for an open or short to ground. CLEAR any DTCs. TEST the system for normal operation.
  2. C2 CHECK THE ILLUMINATION SOURCE GROUND CIRCUIT FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between the inoperative illumination source, harness side and ground as follows:
      Component Connector-Pin Circuit
      Floor shifter C3245-4 GD116 (BK/VT)
      HVAC module-EMTC C2357a-1 GD116 (BK/VT)
      Memory set switch C503-7 GD126 (BK/WH)
      Headlamp switch C205-10 GD116 (BK/VT)
      Clock C2016-5 GD116 (BK/VT)
      Message center switch C253-4 GD116 (BK/VT)
      Hazard/passenger air bag disable/traction switch C2355-1 GD116 (BK/VT)
      Deck lid release switch C2269-2 GD116 (BK/VT)
      LH front window adjust switch C535b-6 GD126 (BK/WH)
      RH front window adjust switch C624-6 GD139 (BK/YE)
      LH door lock control switch C505- 4 GD126 (BK/WH)
      RH door lock control switch C605-4 GD139 (BK/YE)
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new component for the inoperative component. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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