Headlight vacuum

[mAdMoPaR]

Does the headlight vacuum canister hold vacuum?  How do you test it to make sure its working properly?  Thanks.

[70 sublime]

The tank is like a reserve so when you turn the car off there is still enough vacuum to close the doors  ( if nothing is leaking )

[mAdMoPaR]

The tank is like a reserve so when you turn the car off there is still enough vacuum to close the doors  ( if nothing is leaking )

So would be possible to be able to check if it is indeed able to hold vacuum while out of the car? Reason is I traced the poor idle/ stalling to a vacuum leak to my headlight vacuum hose and now trying to figure out where in the headlight vacuum circuit (switch, canister, hoses, etc.)

[DownZero]

Should be an easy test. Just apply vacuum to it with a hand held vacuum pump and see if it holds.

[70 sublime]

Do you have one of those hand held brake bleeder pumps ?
That would work to see if the tank is leaking

[Hemidog]

I would say the most like culprits is the headlight switch, the actuators, then the canister

[mAdMoPaR]

Yes I do have a pump, will try that tonight. I'm assuming it's a one way check valve right? Are these valves removable or repairable? I did notice its pretty loose and spins freely.

[Hemidog]

Yes, it is a check valve.

I do not believe it is serviceable, but it did help to spray a little WD40 in each hole.

The actuators are semi-serviceable. Mine leaked a lot of vacuum from the actuator rod due to corrosion, but I managed to seal it up.