Test B: The Steering Wheel Control Illumination Is Inoperative

PINPOINT TEST B: THE STEERING WHEEL CONTROL ILLUMINATION IS INOPERATIVE

B1-B3:

B3-B4:

B5:

Normal Operation
The smart junction box (SJB) sends a pulse width modulated (PWM) voltage to the steering wheel controls through circuit VLN04 (VT/GY) to the clockspring. The PWM signal passes through the clockspring to circuit VLN04 (VT/GY) to the LH and RH control switches. Ground to the clockspring is supplied through circuit GD116 (BK/VT). Ground from the clockspring to the LH and RH steering wheel switch is supplied through circuit GD165 (BK).

Possible Causes
- Circuit GD116 (BK/VT) open
- Circuit GD165 (BK) open
- Circuit VLN04 (VT/GY) open
- Steering wheel control switch(es)
- Clockspring