Vacuum leak

krazykuda said

Have you tried tracing the power wire to the switch to see if it's got power?

Was the car originally heater only or A/C from the factory???

For the blower motor power, the heater only gets the power into the blower switch directly... With A/C the main power wire goes into the vacuum unit first, then to the blower switch... Make sure that the power in/supply wire has power...

Click to expand...

Yes its a factory a/c car.

I have heat and the blower motor is working. But there is a open vacuum leak that I'm trying to find. When I test the hose going from the engine compartment back to the firewall under vacuum there is none! The engine runs fine and creates vacuum, that's not the issue. My question is that why I have no power going out for the a/c? Dose the a/c heater vacuum switch need vacuum to allow power to go to the compressor? If so that's probably my problem.