Pinpoint Test H : Steering Wheel Switch(Es) Illumination Is Inoperative Or Always On
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- 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.
- H1 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 If all non-networked illumination sources are inoperative, GO to Pinpoint Test C If all non-networked illumination sources are always on, GO to Pinpoint Test D No If all steering wheel switch illumination is inoperative, GO to H2 If only one steering wheel switch is inoperative: GO to H5 - H2 CHECK FOR ILLUMINATION VOLTAGE AT THE CLOCKSPRING
- Ignition OFF.
- Place the headlamp switch in the OFF position.
- Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
- Remove the driver airbag. REFER to: Driver Airbag .
- Disconnect Lower Clockspring C218A.
- 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 C218A-9 Ground
Is the voltage greater than 11 volts?
Yes GO to H3 No REPAIR the circuit - H3 CHECK THE ILLUMINATION GROUND CIRCUIT
- Ignition OFF.
Is the voltage greater than 11 volts?
Yes GO to H4 No REPAIR the circuit. - H4 CHECK THE CLOCKSPRING
- Connect Lower Clockspring C218A.
- Disconnect Upper Clockspring C218B.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C218B pin 9 (component side) C218B pin 10 (component side)
Is the voltage greater than 11 volts?
Yes INSTALL a new steering wheel. REFER to: Steering Wheel . No INSTALL a new clockspring. REFER to: Clockspring . - H5 CHECK THE STEERING WHEEL HARNESS ILLUMINATION CIRCUIT FOR AN OPEN
- Ignition OFF.
- Place the headlamp switch in the OFF position.
- Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
- Remove the driver airbag. REFER to: Driver Airbag .
- Disconnect Inoperative switch.
- Disconnect Upper Clockspring C218B.
- Measure:
LH steering wheel switch
Positive Lead Measurement / Action Negative Lead C218B-9 C2999-8 RH steering wheel switch
Positive Lead Measurement / Action Negative Lead C218B-9 C2998-8
Is the resistance less then 3 ohms?
Yes GO to H6 No INSTALL a new steering wheel. REFER to: Steering Wheel . - H6 CHECK THE STEERING WHEEL HARNESS ILLUMINATION GROUND CIRCUIT FOR AN OPEN
- Measure:
LH steering wheel switch
Positive Lead Measurement / Action Negative Lead C218B-10 C2999-2 RH steering wheel switch
Positive Lead Measurement / Action Negative Lead C218B-10 C2998-2
Is the resistance less then 3 ohms?
Yes REFER to: Steering Wheel Multifunction Switch . No INSTALL a new steering wheel. REFER to: Steering Wheel . - Measure: