Bus (+/-) Signals Open/No Response From Radio

Tests 1 - 3:

Tests 4 - 8:

Tests 9 - 10:

SYMPTOM
BUS +/- SIGNALS OPEN OR NO RESPONSE FROM RADIO

POSSIBLE CAUSES
- No response from radio
- Replace fuse # 14
- 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
- Radio internally open
- PCI bus circuit open
- Body control module