Test C: The Steering Wheel Control Illumination Is Inoperative

PINPOINT TEST C: THE STEERING WHEEL CONTROL ILLUMINATION IS INOPERATIVE

C1:

C1-C3:

C4:

Normal Operation
The smart junction box (SJB) sends a pulse-width modulated (PWM) voltage to the steering wheel controls through circuit CLN04 (BU/BN) to the clockspring. The voltage passes through the clockspring to the steering wheel control switch harness and on to the steering wheel controls. Ground is supplied through the clockspring and circuit GD138 (BK/WH).

Possible Causes
- circuit CLN04 (BU/BN) open
- circuit GD138 (BK/WH) open
- steering wheel control switch harness
- steering wheel control switch(es)
- clockspring