No Communication With CD/DVD Changer - Radio

Test 1 - Test 2:

Test 3 - Test 5:

SYMPTOM
NO COMMUNICATION WITH CD/DVD CHANGER - RADIO

POSSIBLE CAUSES
- Fused B+ circuit open
- CD/DVD changer wiring harness
- PCI BUS circuit open
- Ignition RUN/ACC signal circuit open
- Radio ground CKT open
- CD/DVD changer