Test Step 1 - Inspect For Object Holding Switch In An On Position

Inspect the A/C Heater Control for an object or debris holding the (EBL) Electronic Rear Defrost switch in an On position.

NOTE:

Using the scan tool you can read the On/Off status of the control switch.

Is the (EBL) Electronic Rear Defrost switch being held in or stuck in an On?

Yes

Clean or repair the A/C Heater Control as necessary. If you are unable to clean the switch to where the switch can work properly, replace and program the A/C Heater Control. Refer to REMOVAL AND INSTALLATION .
Perform the HVAC Verification Test. Refer to HVAC .