long time lurker,first time poster.

i just aquired a 95 3500 5sp truck and i am going thru all the normal post purchase check stuff.

on the the drivers side inner fender is a vacuum valve with the hose attached and 3 wires coming out of it. some one had cut the wires. i reconnected them but i cant find in my crapp haynes (yah,i know) manual what it does.

thanks for any help!

this board is a excellent resource.

 

welcome to diesel bombers, does your cruise work?

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where does the vaccume lines go?

 

i have not tried the cruise but i will on my way home tonight.

the vacum line T's into the brake booster line and what looks like the HVAC control lines under the hood.

i will shoot a picture and post in a few minutes.

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i think that its the cruz controls but not sure either

 

My guess would be cruise control or a low vacuum warning switch. I know the '90's model Fords had low vacuum warning switches that looked very similar to that...although every one I've ever owned never warned me of low vacuum

 

confirmed cruise control works.