Test A
PINPOINT TEST A: THE AUDIO UNIT IS INOPERATIVE/DOES NOT OPERATE CORRECTLYTest A1:
Test A1-A3:
Test A3 Continued:
Normal Operation
The audio unit is powered through circuits 1001 (WH/YE), 1002 (BK/PK), and 1003 (GY/YE). The audio unit ground is received through the circuits 1204 (BK/OG), and 1203 (BK/LB) and The Speaker Walk Around Test can be carried out pressing Preset buttons 3 and 6 simultaneously.
Possible Causes
- BJB fuse 6 (60A)
- CJB fuse(s):
- 3 (20A)
- 28 (5A)
- circuit 1001 (WH/YE) short to ground or open
- circuit 1002 (BK/PK) short to ground or open
- circuit 1003 (GY/YE) open or short to power
- circuit 1203 (BK/LB) open
- circuit 1204 (BK/OG) open
- circuit 1205 (BK) open
- audio unit