No Sound From All Speakers

Tests 1 - 3:

Tests 4 - 8:

Tests 9 - 10:

SYMPTOM
NO SOUND FROM ALL SPEAKERS

POSSIBLE CAUSES
- Radio 12V output circuit defective, open
- Radio ground circuit defective, open
- Power relay output circuit defective, open
- Radio 12V output circuit shorted to ground
- Radio choke defective
- Speaker power relay defective, open
- Speaker power relay defective, open
- Junction block defective open circuit
- Defective radio
- Radio choke output circuit defective, open
- Radio output circuits defective