OK check wire gray/yellow pin 7 check that harness power with a tester. If it has voltage check pin 8 black for resistance to ground. Should be less than 5 ohms. If that is OK check resistance between pin 7 gray/yellow and pin 3 dark green/ orange resistance should be between 4001 and 5000 ohms. If the resistance is less than 5,000 check resistance on pin 7 gray/yellow and pin 3 DG/OG . if restance is less than 5 ohms you have a short between those wires if not you need a new climate control switch. Of your resistance is greater than 5,000 ohms then you probably have a open on pin 3 DG/OG and climate control connector pin 3 DG/OG of their resistance is less than 5 ohms there replace the climate control switch. IF YOU JUST WANT TO THROW A PART AT IT INSTEAD OF CHECKING WIRING REPLACE THE CLIMATE CONTROL SWITCH. if that doesn't fix it at least wiring fixes don't cost much...... Well money wise at least if your doing it your self