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Home >> Ford >> 2023 >> F-150 Lightning Pro >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel And Interior Switches Illumination >> Diagnosis And Testing >> Instrument Panel and Interior Switches Illumination >> Pinpoint Test >> Pinpoint Test G: Steering Wheel Switch(Es) Illumination Is Inoperative Or Always On

Pinpoint Test G: Steering Wheel Switch(Es) Illumination Is Inoperative Or Always On

  1. Refer to CLUSTER AND PANEL ILLUMINATION for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Instrument Panel and Interior Switches Illumination - System Operation and Component Description 

    Possible Sources 

    • Wiring, terminals, or connectors
    • Steering wheel switch(es)
    • Clockspring
    • Steering wheel

    WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.

  2. G1 INSPECT THE NON-NETWORKED ILLUMINATION COMPONENTS

    • Ignition ON.

    • Place the headlamp switch in the PARKING LAMPS or HEADLAMPS position.

    • While pressing the illumination dim up and dim down switch, monitor the non-networked illumination components.

    Are all of the non-networked illumination sources inoperative or always on? 

    Yes  GO to Pinpoint Test C 
    No  If all steering wheel switch illumination is inoperative, GO to  G2If only one steering wheel switch is inoperative: GO to  G8

  3. G2 CHECK THE HORN OPERATION

    • Press the airbag module against the steering wheel.

    Does the horn sound? 

    Yes  If all steering wheel switch illumination is inoperative, vehicles without adaptive steering, GO to  G3If all steering wheel switch illumination is inoperative, vehicles with adaptive steering, GO to  G6
    No  For vehicles without adaptive steering, REFER to: Horn For vehicles with adaptive steering, REFER to: Horn - Vehicles With: Active Steering

  4. G3 CHECK FOR ILLUMINATION VOLTAGE AT THE SCCM (STEERING COLUMN CONTROL MODULE)

    • Ignition OFF.

    • Place the headlamp switch in the OFF position.

    • Place a light source over the ambient light sensor so the illumination can reach maximum intensity.

    • Headlamp switch in the PARKING LAMPS or HEADLAMPS position.

    • Ignition ON.

    • Press the illumination dim up switch until full illumination intensity is reached.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C226A Pin 7
      GFD741814Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  G4
    No  REPAIR the circuit

  5. G4 CHECK FOR ILLUMINATION VOLTAGE TO THE STEERING WHEEL HARNESS

    • Ignition OFF.

    • Disconnect Clockspring C218B.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C218B pin 15 (component side)
      GFD741814Courtesy of FORD MOTOR COMPANY
      		 C218B pin 4 (component side)

    Is the voltage greater than 11 volts? 

    Yes  INSTALL a new steering wheel. REFER to: Steering Wheel
    No  GO to  G5

  6. G5 CHECK THE CLOCKSPRING FOR AN OPEN

    • Ignition OFF.

    • Place the headlamp switch in the OFF position.

    • Disconnect Clockspring C218D.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C218B pin 15 (component side)
      GFD741815Courtesy of FORD MOTOR COMPANY
      		 C218D pin 9 (component side)

    Is the resistance less than 3 ohms? 

    Yes  INSTALL a new SCCM. REFER to: Steering Column Control Module (SCCM)
    No  INSTALL a new clockspring. REFER to: Clockspring - Vehicles Without: Adaptive Steering

  7. G6 CHECK FOR ILLUMINATION VOLTAGE AT THE CLOCKSPRING

    • Ignition OFF.

    • Place the headlamp switch in the OFF position.

    • Disconnect Clockspring C218C.

    • Place a light source over the ambient light sensor so the illumination can reach maximum intensity.

    • Headlamp switch in the PARKING LAMPS or HEADLAMPS position.

    • Ignition ON.

    • Press the illumination dim up switch until full illumination intensity is reached.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C218C Pin 6
      GFD741814Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  G7
    No  REPAIR the circuit

  8. G7 CHECK THE CLOCKSPRING FOR AN OPEN

    • Ignition OFF.

    • Disconnect Clockspring C218G.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C218G pin 1 (component side)
      GFD741814Courtesy of FORD MOTOR COMPANY
      		 C218G pin 6 (component side)

    Is the voltage greater than 11 volts? 

    Yes  INSTALL a new steering wheel. REFER to: Steering Wheel - Vehicles With: Adaptive Steering
    No  INSTALL a new clockspring. REFER to: Clockspring - Vehicles With: Adaptive Steering

  9. G8 CHECK THE STEERING WHEEL HARNESS ILLUMINATION CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Place the headlamp switch in the OFF position.

    • Disconnect Inoperative switch.

    • Place a light source over the ambient light sensor so the illumination can reach maximum intensity.

    • Headlamp switch in the PARKING LAMPS ON position.

    • Ignition ON.

    • Press the illumination dim up switch until full illumination intensity is reached.

    • Measure:

      LH steering wheel switch 

      Positive Lead Measurement / Action Negative Lead
      C2998 Pin 1
      GFD741814Courtesy of FORD MOTOR COMPANY
      		 C2998 Pin 6

      RH steering wheel switch 

      Positive Lead Measurement / Action Negative Lead
      C2999 Pin 1
      GFD741814Courtesy of FORD MOTOR COMPANY
      		 C2999 Pin 6

    Is the voltage greater than 11 volts? 

    Yes  Install a new steering wheel switch. REFER to: Steering Wheel Multifunction Switch
    No  INSTALL a new steering wheel.For vehicles without adaptive steering, REFER to: Steering Wheel For vehicles with adaptive steering, REFER to: Steering Wheel - Vehicles With: Adaptive Steering
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