Test C: The Climate Control Illumination Is Inoperative

PINPOINT TEST C: THE CLIMATE CONTROL ILLUMINATION IS INOPERATIVE

Normal Operation
A variable pulse-width modulated (PWM) voltage is supplied to the climate control assembly through circuit 19 (LB/RD). Ground is supplied to the climate control assembly through circuit 875 (BK/LB).

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Heating ventilation air conditioning (HVAC) module - electronic automatic temperature control (EATC)
- Heating ventilation air conditioning (HVAC) module - electronic manual temperature control (EMTC)

C1-C2:

C2-C3: