No Response From Radio

Tests 1 - 5:

Tests 6 - 11:

SYMPTOM
NO RESPONSE FROM RADIO

POSSIBLE CAUSES
- Antenna/Ground strap installed improperly
- CCD Bus (+) circuit open
- CCD Bus (-) circuit open
- Fused B (+) circuit open
- Fused ignition switch output circuit open
- Fused ignition switch output shorted to ground
- Radio doesn't communicate
- Radio won't communicate
- Radio blowing fuses