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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1274 (Instrument Cluster Illumination And Panel Illumination) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test F: One Or More Switch Illumination is Inoperative >> Pinpoint Test F: One Or More Switch Illumination Is Inoperative

Pinpoint Test F: One Or More Switch Illumination Is Inoperative

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 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. F1 CHECK THE VOLTAGE TO THE SINGLE ILLUMINATION SOURCE 
    • Ignition OFF.
    • Disconnect: Inoperative Illumination Source.
    • Ignition ON.
    • Place the headlamp switch to the PARKING LAMPS ON position.
    • 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:
      VOLTAGE REFERENCE CHART

      Component Connector-Pin Circuit
      Floor shifter C2096-3 VLN04 (VT/GY)
      Headlamp switch C205-2 VLN04 (VT/GY)
      Message center switch C269-1 VLN04 (VT/GY)
      Traction control switch C280-3 VLN04 (VT/GY)
      -
      Active park assist switch C2035-3 VLN04 (VT/GY)
      Ambient lighting switch C3350-3 VLN04 (VT/GY)
      LH door lock control switch C505-3 CBP41 (BU)
      RH door lock control switch C605-3 CBP41 (BU)
      Fig 1: Checking Circuit VLN04 (Dimmable Backlighting) Or Circuit CBP41 (Fixed Backlighting) For Open
      G06390637Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes:  For a door lock control switch, INSTALL a new door lock control switch in question. REFER to DOOR LOCK CONTROL SWITCH . For all other components, GO to F2  . TEST the system for normal operation.
    • No:  REPAIR circuit VLN04 (VT/GY) (dimmable backlighting) or circuit CBP41 (BU) (fixed backlighting) for an open. TEST the system for normal operation.
  2. F2 CHECK FOR VOLTAGE TO THE SINGLE ILLUMINATION SOURCE USING THE CONNECTOR GROUND 
    • Measure the voltage between the inoperative illumination source, harness side as follows:
      VOLTAGE REFERENCE CHART

      Component Connector-Pin/Circuit Connector-Pin/Circuit
      Floor shifter C2096-3
      VLN04 (VT/GY)      		 C2096-4
      GD112 (BK/GN)
      Headlamp switch C205-2
      VLN04 (VT/GY)      		 C205-1
      GD112 (BK/GN)
      Traction control switch C280-3
      VLN04 (VT/GY)      		 C280-2
      GD114 (BK/BU)
      Active Park assist switch C2035-3
      VLN04 (VT/GY)      		 C2035-5
      GD114 (BK/BU)
      Message center switch C269-1
      VLN04 (VT/GY)      		 C269-4
      GD112 (BK/GN)
      Ambient lighting switch C3350-3
      VLN04 (VT/GY)      		 C3350-4
      GD908 (BK)
      Fig 2: Checking Ground Circuit In Question For Open
      G06390638Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes:  INSTALL a new component in question. TEST the system for normal operation.
    • No:  REPAIR the ground circuit in question for an open. TEST the system for normal operation.
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