No Response From Radio

Tests 1 - 3:

Tests 4 - 8:

Tests 9 - 10:

SYMPTOM
NO RESPONSE FROM RADIO

POSSIBLE CAUSES
- No response from radio
- Replace fuse # 30
- Radio shorted to ground
- Fused ignition switch output circuit shorted to ground
- Junction block shorted to ground
- Open fused ignition switch output circuit
- Open fused B+ circuit
- RADIO GROUND CIRCUIT OPEN
- OPEN PCI BUS CIRCUIT
- RADIO