HVAC controller not working
 

I just changed out my alternator last week and every thing works except my HVAC. No screen, buttons or lights. I don't know if there is any connection, but that is the only work that had been done.

I tried another box that the seller said worked when pulled from another rig.

Does anyone have a schematic that shows where the wires from the 12 pin plug go. I need to find where the switched power comes from.

The truck is a 92 ECSB K1500.

Thanks
Steve

Re: HVAC controller not working
 

Which wire are you wanting to explore?

Re: HVAC controller not working
 

Apparently all 16 of the wires that come out of the connector.

I need the complete schematic or wiring diagram for the dashboard area. I would imagine that it's the rest of the picture that you showed that shows the other ends of all the wires.

Re: HVAC controller not working
 

Here is the complete ac diagram that should match your system