No Response From Radio

Test 1 - Test 3:

Test 4 - Test 6:

SYMPTOM
NO RESPONSE FROM RADIO

POSSIBLE CAUSES
- Check powers and grounds to the radio
- Transmission control module
- K-TCM, radio circuit shorted to ground
- Transmission control module
- K-TCM, radio circuit shorted to voltage
- K-TCM, radio circuit open
- Radio