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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 852 (Instrument Panel And Interior Switches Illumination) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test D : The Steering Wheel Switch(Es) Illumination Is Inoperative >> Pinpoint Test D : The Steering Wheel Switch(Es) Illumination Is Inoperative

Pinpoint Test D : The Steering Wheel Switch(Es) Illumination Is Inoperative

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

  1. D1 CHECK THE OTHER DIMMABLE LIGHTING SWITCHES

    • Ignition ON.
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Press and hold the instrument panel dimmer switch up to the full illumination position and observe other dimmable switches.

    Are all the dimmable steering wheel switches inoperative? 

    Yes  GO to Pinpoint Test A .
    No  If all the steering wheel switches illumination is inoperative, GO to  D2. If only one steering wheel switch illumination is inoperative, GO to  D5.

  2. D2 CHECK THE HORN OPERATION

    • Press the driver air bag module against the steering wheel.

    Does the horn sound? 

    Yes  GO to  D3.
    No  REFER to Horn to diagnose the horn is inoperative.

  3. D3 CHECK FOR VOLTAGE TO THE STEERING WHEEL SWITCHES

    • Place the headlamp switch in the OFF position.
    • Disconnect: Clockspring C218B .
    • Ignition ON.
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Press and hold the instrument panel dimmer switch up to the full illumination position.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C218B-9
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C2998-2

    Is the voltage greater than 10 volts? 

    Yes  INSTALL a new steering wheel. REFER to Steering Column .
    No  GO to  D4.

  4. D4 CHECK FOR VOLTAGE TO THE CLOCKSPRING

    • Disconnect: Clockspring C218A .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C218A-9
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 C218A-8

    Is the voltage greater than 10 volts? 

    Yes  INSTALL a new clockspring. REFER to Supplemental Restraint System .
    No  REPAIR the circuit.

  5. D5 CHECK THE SUSPECT STEERING WHEEL SWITCH FOR VOLTAGE

    • Disconnect: Suspect Steering Wheel Switch.
    • Press and hold the instrument panel dimmer switch up to the full illumination position.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2298-2
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 C2998-4

      Positive Lead Measurement / Action Negative Lead
      C2999-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 C2999-3

    Is the voltage greater than 10 volts? 

    Yes  INSTALL a new component for the one in question.
    No  INSTALL a new steering wheel. REFER to Steering Column .
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