No Response From HVAC (A/C Heater Control Module)

Test 1 - 3:

Test 4 - 7:

Test 8 - 9:

SYMPTOM
NO RESPONSE FROM HVAC

POSSIBLE CAUSES
- Attempt To Communicate With The CTM
- Replace Fuse #25
- A/C Heater Control Shorted To Ground
- Fused Ignition Switch Output Circuit Shorted To Ground
- Junction Block Shorted To Ground
- Ground Circuit(s) Open
- Fused Ignition Switch Output Circuit Open
- Open PCI BUS Circuit
- A/C Heater Control