Poor Sound From One Speaker

Test 1 - 4:

Test 5 - 9:

Test 10 - 13:

SYMPTOM
POOR SOUND FROM ONE SPEAKER

POSSIBLE CAUSES
- Speaker (+) circuit
- Speaker (-) circuit
- Negative speaker output of radio
- Positive speaker output of radio
- Amplified speaker (+) circuit
- Amplified speaker (-) circuit
- Negative speaker output of amplifier
- Positive speaker output of amplifier
- Pillar speaker (+) CKT. open
- Pillar speaker (-) CKT. open
- Pillar speaker
- Speaker