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Home >> Lincoln >> 2007 >> Navigator RWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster System And Panel Illumination >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test D: The Steering Wheel Control Illumination Is Inoperative >> Pinpoint Test D: The Steering Wheel Control Illumination Is Inoperative

Pinpoint Test D: The Steering Wheel Control Illumination Is Inoperative

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. D1 CHECK THE OTHER DIMMABLE LIGHTING SWITCHES 
    • Key in OFF position.
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Rotate the instrument panel dimmer switch to the full illumination position and observe other dimmable switches (door lock switches, hazard lamp switch, headlamp switch for example).
    • Are all the dimmable switches inoperative? 
    1. YES  : Go to Pinpoint Test A .
    2. NO  : Go to  D2.
  2. D2 CHECK CIRCUIT VLN04 (VT/GY) (NAVIGATOR) OR VLN18 (BU/WH) (EXPEDITION) FOR AN OPEN 
    • Place the headlamp switch in the OFF position.
    • Depower the supplemental restraint system (SRS). Refer to SUPPLEMENTAL RESTRAINT SYSTEM article.
    • Disconnect: Clockspring C218a
    • Connect the battery ground cable.
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Rotate the instrument panel dimmer switch to the full illumination position.
      • Fig 1: Checking Circuit For Open
      GF0023326Courtesy of FORD MOTOR CO.
    • Measure the voltage between the clockspring C218a-16, circuit VLN04 (VT/GY) (Navigator) or VLN18 (BU/WH) (Expedition), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : TURN the headlamp switch off. Go to  D3.
    2. NO  : DISCONNECT the battery ground cable. REPAIR the circuit. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
  3. D3 CHECK CIRCUIT GD133 (BK) FOR AN OPEN 
      Fig 2: Checking Circuit For Open
      GF0023327Courtesy of FORD MOTOR CO.
    • Measure the resistance between the clockspring C218a-5, circuit GD133 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  D4.
    2. NO  : REPAIR the circuit. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
  4. D4 CHECK THE CLOCKSPRING FOR AN OPEN 
    • Remove the driver air bag module. Refer to SUPPLEMENTAL RESTRAINT SYSTEM article.
    • Disconnect: Upper Clockspring C218b
      • Fig 3: Checking Clockspring For Open
      GF0023328Courtesy of FORD MOTOR CO.
    • Measure the resistance between the clockspring C218a pin 16, component side and the upper clockspring C218b pin 7, component side; and between the clockspring C218a pin 5, component side and the upper clockspring C218b pin 4, component side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  D5.
    2. NO  : INSTALL a new clockspring. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
  5. D5 CHECK THE STEERING WHEEL CONTROL SWITCH HARNESS 
    • Disconnect: Steering Wheel Control Switches
    • Measure the resistance between the upper clockspring, harness side, and the steering wheel control switches as follows:
      EXPEDITION

      Upper Clockspring Connector-Pin Steering Wheel Control Switch Connector-Pin Circuit
      C218b-7 LH steering wheel switch C2366-4 RD/BK
      C218b-7 RH steering wheel switch C2366-7 RD/BK
      C218b-4 LH steering wheel switch C2366-3 DG/OG
      C218b-4 RH steering wheel switch C2366-1 DG/OG
      NAVIGATOR

      Upper Clockspring Connector-Pin Steering Wheel Control Switch Connector-Pin Circuit
      C218b-7 LH steering wheel switch C2998-2 RD/BK
      C218b-7 RH steering wheel switch C2999-1 RD/BK
      C218b-4 LH steering wheel switch C2998-4 DG/OG
      C218b-4 RH steering wheel switch C2999-3 DG/OG
    • Are the resistance less than 5 ohms? 
    1. YES  : INSTALL new steering wheel controls. REFER to SPEED CONTROL article or INFORMATION AND ENTERTAINMENT SYSTEMS article as necessary. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
    2. NO  : REPAIR or INSTALL a new steering wheel control switch harness. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
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