Need help identifying vacuum switch.

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Mar 1, 2023 | 09:37 AM

bsparks911

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Need help identifying vacuum switch.

One of my vacuum switches is missing a hose. Any idea what it controls?
ive looked at multiple diagrams and they only have the 3 switches, this is a 4th one?
93 3.0 4x4 manual. PU.
thanks!

Mar 1, 2023 | 10:21 AM

bsparks911

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After more googling I figured it’s the ac idle up. Ac is working fine, still trying to figure out what hose plugs into the nipple

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