Rear A/C-Heater/Rear Blower Control Inop In One More Speeds

Test 1 - 3:

SYMPTOM
REAR A/C - HEATER CONTROL, REAR BLOWER CONTROL INOP IN ONE MORE SPEEDS

POSSIBLE CAUSES
- Rear blower speed circuit(s) open
- Rear A/C - Heater control
- Rear blower control feed circuit open
- A/C - Heater control module