mountainmanjoe

a smoke tester is the most reliable way to find vacuum leaks

canadatech

Jumping on your thread

whats controls the air conditioning on the vacuum side of things? I had rats chew the vacuum lines so I replaced all the from a wrecker
but no air conditioning.fuses all good and relay.and ideas?

Triaged

AC is electric control. Did all the refrigerant leak out? Can you manually put power to the clutch and will it cycle then? There is a pressure switch too.

canadatech

what’s controls it? The hvac selector is all vacumm. Does the ac actuator have a switch on it?
haven’t put power to clutch yet and there was 10-5psi in the system. I added some to get is to 45 psi

Triaged

https://charm.li/Chevy%20Truck/2013/...Assembly%20X2/



Per the above green and white wire. Torque App will also tell you if the ECU sees the AC request.

canadatech

ok how does the system know there is a request for ac? Since it all vacuum?

canadatech

just trying to understand the system

Triaged

It isn't all vacuum. There are a lot of wires here.

canadatech

yes but the selector for the ac is on the vacuum?

canadatech

so the hvac control selector with the bac lines attached also sends a signal within the controller to the ecm?