If you have power, then I suspect you lost the ground or at least a good ground. I attached two pics. The first one simply shows that three different components use the same ground. Two of which are the things you are having trouble with. The second pic shows the ground location. I need you to check the ground location for damage, corrosion, or anything out of place. If it appears good, turn the key on and move it around to see if the climate control unit flickers or turns on.
Let me know what you find.
Images (Click to enlarge)
Friday, June 26th, 2020 AT 8:05 PM