I'm having ac problems with my car and first thought it was low on freon...Then realized the compressor was running and the ac line was ice cold... I have traced it down to the vacuum tank operations… there are 2 wiring harnesses on it, one is defiantly a solenoid of some kind.... Vacuum lines attach from it to the intake, ac control, heater valve, vacuum pump, and charcoal canister... I want to know what controls the electrical parts to it and can’t seem to find what I'm looking for in wiring diagrams. I can manually hook up the ac control line to the intake vacuum and the cold air works but you lose it in boost in this way... Any help would be appreciated