Test A: No Communication With The Audio Unit

PINPOINT TEST A: NO COMMUNICATION WITH THE AUDIO UNIT

A1-A2:

Normal Operation
Power is supplied to the audio unit on circuits 797 (LG/VT) and 687 (GY/YE). The audio unit is grounded through circuit 1204 (BK/OG).

Possible Causes
- audio unit
- circuit 797 (LG/VT) open
- circuit 687 (GY/YE) open
- circuit 1204 (BK/OG) open