Test H: The Keypad Switch Illumination Is Inoperative

PINPOINT TEST H: THE KEYPAD SWITCH ILLUMINATION IS INOPERATIVE

H1:

H1-H3:

H4:

Normal Operation
The smart junction box (SJB) sends a pulse-width modulated (PWM) voltage to the keypad switch, based on input received from the instrument panel dimmer switch, through circuit 66 (LB). Ground for the keypad switch is provided through circuit 1205 (BK).

Possible Causes
- Circuit 66 (LB) open
- Circuit 1205 (BK) open
- Keypad switch
- SJB