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On a Dodge truck, the vacuum switch is on the transfer case.On a Dodge truck, the vacuum switch is on the transfer case.
The vacuum actuator is on the right side of the axle. The electrical switch is on the actuator. The vacuum switch is on the top of the transfer case.
It differs on different vacuums.
The vacuum selector switch on a 1999 Chevy Tahoe is located under the dash. It is to the right of the gas pedal.
remove headlight switch
If equipped, it is on the top of the transfer case and has four vacuum lines plugged into it.
It is on the top of the transfer case.
Google iit using keywords 1999 Hyundai (size of engine) vacuum hose routing
I am not a corvette mechanic, but I call BS on vacuum diagnostic switch.
The leak detection pump pressure switch is located next to the service vacuum supply. It will be connected to the LDP filter and below the EVAP canister.
There is no vacuum switch. There is an electric actuator on the front left of the front end assembly right in front of where the cv shaft goes into the differential case and an electric actuator on the rear right of the transfer case.
With the car running, use a can of WD40 and spray all vac. lines, connectors, etc. When you spray near the leak you will hear the RPM's rise. That should get you in the ball park of your leak source.