Test F: The Control Illumination Does Not Dim

PINPOINT TEST F: THE CONTROL ILLUMINATION DOES NOT DIM

F1-F2:

F2-F4:

F4-F6:

Normal Operation
The smart junction box (SJB) monitors the input from the instrument panel dimmer switch by monitoring voltage on circuit 1403 (BK/WH). Ground is provided through circuit 1036 (BN/WH).

DTC B1247 - sets when an open is detected on circuit 1403 (BK/WH).

Possible Causes
- Circuit 1036 (BN/WH) open, short to ground or voltage
- Circuit 1403 (BK/WH) open, short to ground or voltage
- Instrument panel dimmer switch
- SJB