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No Response From Radio

Test 1 - 3:




Test 4 - 8:




Test 9 - 10:






SYMPTOM
NO RESPONSE FROM RADIO

POSSIBLE CAUSES
- No response from radio
- Replace fuse #18
- 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
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