No Response From Central Timer Module

Test 1 - Test 3:

Test 4 - Test 6:

SYMPTOM
NO RESPONSE FROM CENTRAL TIMER MODULE

POSSIBLE CAUSES
- Check powers and grounds to the central timer module
- Security system module
- K-CTM, SSM circuit shorted to ground
- Security system module
- K-CTM, SSM circuit shorted to voltage
- K-CTM, SSM circuit open
- Central timer module