Climate Control Module No Power

[kaiokenkai]

I have a 2003 z71 Tahoe and my climate control module stopped working (but backlights work as shown in picture). Replaced module ( and tested with 2 other working modules ) no fix , checked fuses, and also replaced blower motor resistor. Anyone else run into this issue or have ANY clue on what this could be ? Any information will be appreciated.

p.s the picture is from another guy i found that had the same problem, but was a dead end thread. same exact issue though.

 

[Joseph Garcia]

@swathdiver may be able to give you some troubleshooting pointers.

 

[Fless]

The backlighting is a separate circuit.

Which fuses have you checked? Do you have voltage to the HVAC controller connector, and ground, at the plug on the back?

Interior fusebox on the driver's side by the door:



Underhood fusebox (in addition to the fuse indicated, check the "RR HVAC" fuse that's next to the Starter relay, just to rule it out):