LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 290 (Instrument Cluster Illumination And Panel 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 2013 Ford F-150. 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. 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 SYSTEM to diagnose the horn is inoperative.
  3. D3 CHECK FOR VOLTAGE TO THE STEERING WHEEL SWITCHES 
    • Place the headlamp switch in the OFF position.
    • Remove the driver air bag module. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
    • 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 the voltage between the clockspring C218B-9, component side and the clockspring C218B-10, component side.
      Fig 1: Measuring Voltage Between Clockspring C218B-9, Component Side And Clockspring C218B-10 Component Side
      G07964035Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : INSTALL a new steering wheel. REFER to STEERING COLUMN . TEST the system for normal operation.
    • No  : GO to D4.
  4. D4 CHECK FOR VOLTAGE TO THE CLOCKSPRING 
    • Disconnect: Clockspring C218A.
    • Measure the voltage between the clockspring C218A-9, circuit VLN04 (VT/GY), harness side and the clockspring C218A-8, circuit GD133 (BK), harness side.
      Fig 2: Measuring Voltage Between Clockspring C218A-9, Circuit VLN04 (VT/GY) And Clockspring C218A-8, Circuit GD133 (BK) Harness Side
      G07964036Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : INSTALL a new clockspring. REFER to SUPPLEMENTAL RESTRAINT SYSTEM . TEST the system for normal operation.
    • No  : REPAIR circuit VLN04 (VT/GY) for an open. TEST the system for normal operation.
  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 the voltage between the inoperative illumination source, harness side as follows:
      Component Connector-Pin Connector-Pin
      Steering wheel switch - LH C2998-2 C2998-4
      Steering wheel switch - RH C2999-1 C2999-3
      Fig 3: Measuring Voltage Between Inoperative Illumination Source Harness Side Connector
      G07413289Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : INSTALL a new component for the one in question. TEST the system for normal operation.
    • No  : INSTALL a new steering wheel. REFER to STEERING COLUMN . TEST the system for normal operation.
scientia non olet · About LEMON Manuals