No power to the Climate control?

We need to test the power at the climate control head pin # A9 lt/green wire with the key on. Also check for power at fuse #16 7.5 amp at the under-dash fuse panel left kick panel.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Here is a guide to help and the climate control wiring diagrams so you can see how the system works in case you need them. Check out the images (below). Please let us know what you find. We are interested to see what it is.

My bad, I made a correction its pin A9 on the climate control unit, it should be 12 volts, key on. So, you are getting 4.8 volts at the fuse #16 on the drives side fuse panel (behind left kick panel) correct? This fuse is powered by the ORG wire that comes from the ignition switch. Let's double check the voltage at fuse 16 before we replace the switch. Here is how to replace the switch in case you need it. Check out the images (below). Please let us know what you find.

Sure is, did you re-check for power at fuse #16?

With the key on please test the red wire coming out of the ignition switch, it should be 12 volts. Let me know.

Okay, are you getting 12 volts at pin A9 on the climate control unit? If so, we should confirm the HVAC controller failure by doing a CAN scan which is easy, you can get a CAN scanner (Controller Area Network) from Amazon from about $32.00. here is a video to show you how. Also check the ground b4 which is behind the middle of the dash.

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Amazon CAN scanner link:

https://amzn.to/3sX8MCX

Here is how to change the HVAC controller out in case you need it. Check out the images (below). Please let us know what you find. We are interested to see what it is.

Double check the voltage reading and if none the ignition switch is bad, or you have a short in the wiring. You can use the wiring diagrams in my first post to check the connections and see how the system works.