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Discussion Starter · #1 ·
I found a disconnected vacum line going into the firewall right behind the engines valve cover. Anyone know what its for?
I replaced it but notice nothing different.

Thanks.
 

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it also controls the ducts on your ac. if you disconnect it, it will get stuck in whatever position you left it in. and it also controls your 4x4
 

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Mopar1973Man.Com
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Yeap... The vacuum line controls all your vents inside... But for safety measure it should default to DEF mode... As for the 4WD that is if you have a CAD system.. My 2002 doesn't have this but my Mom's truck does...
 
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