Pinpoint Test J: The Steering Wheel Switch Illumination Is Inoperative Or Always On

WARNING: This page is about a different car, the 2014 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

J1 INSPECT THE NON-NETWORKED ILLUMINATION SOURCES
- Ignition ON.
- Turn the parking lamps ON.
- While pressing the instrument panel dimmer switch up and down, monitor the non-networked illumination sources.
Are all of the non-networked illumination sources inoperative or always on?
- Yes : If all non-networked illumination sources are always on, GO to PINPOINT TEST D
  If all non-networked illumination sources are inoperative, GO to PINPOINT TEST B
- No : If one or more steering wheel switch illumination is always on, INSTALL new steering wheel switches for the affected parts.
  REFER to: STEERING WHEEL MULTIFUNCTION SWITCH .
  
  If one or more (but not all) steering wheel switch illumination is inoperative, GO to J5
  
  If all steering wheel switch illumination is inoperative, GO to J2

J2 CHECK FOR ILLUMINATION VOLTAGE AND GROUND AT THE CLOCKSPRING

Turn the parking lamps OFF.
Ignition OFF.
Wait 1 minute to depower the SRS.
Disconnect Clockspring C218A .
Ignition ON.
Place a shop light over the ambient light sensor to make sure the illumination can reach maximum brightness.
Turn the parking lamps ON.
Press the instrument panel dimmer switch up until the illumination reaches full brightness.

Measure:

Positive Lead	Measurement/Action	Negative Lead
C218A-1		C218A-4

Is the voltage greater than 11 volts?

Yes : GO to J4
No : GO to J3

J3 CHECK FOR ILLUMINATION VOLTAGE AT THE CLOCKSPRING

Measure:

Positive Lead	Measurement/Action	Negative Lead
C218A-1		Ground

Is the resistance less than 3 ohms?

Yes : REPAIR circuit VLN04.
No : REPAIR circuit GD214.

J4 CHECK THE ILLUMINATION CIRCUIT FOR AN OPEN IN BETWEEN THE CLOCKSPRING AND THE STEERING WHEEL SWITCHES

Ignition OFF.
Turn the parking lamps OFF.
Remove the driver airbag,
REFER to: DRIVER AIRBAG .
Disconnect LH Steering Wheel Switch.
Disconnect Clockspring C218B .

Measure:

Positive Lead	Measurement/Action	Negative Lead
C2490-8		C218B-11

Is the resistance less than 3 ohms?

Yes : INSTALL a new clockspring.
REFER to: CLOCKSPRING .
No : REPAIR the circuit. If the circuit cannot be repaired, INSTALL a new steering wheel.
REFER to: STEERING WHEEL .

J5 CHECK FOR ILLUMINATION VOLTAGE AND GROUND TO THE STEERING WHEEL SWITCHES

Ignition OFF.
Turn the parking lamps OFF.
Remove the driver airbag,
REFER to: DRIVER AIRBAG .
Disconnect inoperative illumination source.
Place a shop light over the ambient light sensor to make sure the illumination can reach maximum brightness.
Ignition ON.
Turn the parking lamps ON.
Press the instrument panel dimmer switch up until the illumination reaches full brightness.

Measure:

LH steering wheel switch

Positive Lead	Measurement/Action	Negative Lead
C2490-8		C2490-2

RH steering wheel switch

Positive Lead	Measurement/Action	Negative Lead
C2491-8		C2491-2

LH paddle shifter (if equipped)

Positive Lead	Measurement/Action	Negative Lead
C2429-1		C2429-2

RH paddle shifter (if equipped)

Positive Lead	Measurement/Action	Negative Lead
C2428-4		C2428-3

Is the voltage greater than 11 volts?

Yes : INSTALL a new steering wheel switch.
REFER to: STEERING WHEEL MULTIFUNCTION SWITCH .
No : GO to J6

J6 CHECK FOR ILLUMINATION VOLTAGE AT THE STEERING WHEEL SWITCH

Measure:

LH steering wheel switch

Positive Lead	Measurement/Action	Negative Lead
C2490-8		Ground

RH steering wheel switch

Positive Lead	Measurement/Action	Negative Lead
C2491-8		Ground

LH paddle shifter (if equipped)

Positive Lead	Measurement/Action	Negative Lead
C2429-1		Ground

RH paddle shifter (if equipped)

Positive Lead	Measurement/Action	Negative Lead
C2428-4		Ground

Is the voltage greater than 11 volts?

Yes : REPAIR circuit RRH02. If the circuit cannot be repaired, INSTALL a new steering wheel.
REFER to: STEERING WHEEL .
No : REPAIR circuit VLN04.