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:

A3-A5:

A5-A7:

Normal Operation
The audio unit receives voltage at all times through circuit 29-MD15 (OG/BK), voltage in RUN/ACC through circuit 75-MD15 (YE/GN), and ground through circuit 91-MD15 (BK/GN). The audio unit is operational with the key in RUN or ACC.

Possible Causes
- Fuse
- Circuit 29-MD15 (OG/BK) open
- Circuit 75-DA4 (YE/GN) open
- Circuit 75-MD15 (YE/GN) open
- Circuit 91-MD15 (BK/GN) open
- Audio unit.