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I know the headlight vacuum is supplied to one of those two connectors on that gray thing. But what else connects to it?? This is the last piece I need to finish my vacuum set up and the manual only shows it to be a single connection instead of a duel. It a 82'
That appears to be a tempature-action vacuum switch: manifold vacuum at operating temp; no vacuum when cold. Not sure what that was hooked to for '82, but likely something in the emissions control system.
The headlamps are fed from a reservoir (tank, tube, etc), rather than directly from the manifold. Basically, manifold vacuum to a one-way check valve, to the reservoir tank. That keeps a fixed level of vacuum available for the headlamps and heater/A/C controls. Vacuum line is then run from tank to vacuum relays for headlamps. You can connect the relays directly to you manifold, but the headlamps will actuate oddly at times; and it might affect engine a bit when you actuate the lamps.
Last edited by 7T1vette; May 21, 2016 at 07:02 AM.
That is the vacuum source for all the vacuum accessories, A/C, headlights, cruise etc.
The one outlet goes to the headlight resovoir, the other supplies the accessories through a filter, and check valve.
Last edited by bpassmore; May 21, 2016 at 10:21 AM.
top hose to vac can for lights.the bottom one is split between override switch inside car and the other one goes to controls for ac/heating ducts.then the line goes out maybe to the cruse control.not sure of that one
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Headlight vacuum connector on intake
