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

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

A1:

A2-A4:

A5:

Normal Operation
The audio unit receives voltage at all times through circuit 1772 (VT), and voltage in RUN or ACC through circuit 964 (DB/LG). The audio unit receives ground through circuit 694 (BK/LG).

Possible Causes
- Fuse
- Circuit 694 (BK/LG) open
- Circuit 964 (DB/LG) open
- Circuit 1772 (VT) open
- Audio unit