Test A: The Audio Unit Is Inoperative/Does Not Operate Correctly

PINPOINT TEST A: THE AUDIO UNIT IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

A1-A3:

A4:

Normal Operation
The audio unit receives voltage through circuit 797 (LG/VT) at all times, and through circuit 1002 (BK/PK) with the key in RUN or ACC. Ground is provided to the audio unit through circuit 57 (BK) (illumination only) and circuit 694 (BK/LG). With the key in RUN or ACC and the audio unit on, all functions are operational.

Possible Causes
- Fuse
- Circuit 694 (BK/LG) open
- Circuit 797 (LG/VT) open
- Circuit 1002 (BK/PK) open
- Audio unit