Dodge Cummins Diesel Forum banner
  • Hey everyone! Enter your ride HERE to be a part of this month's Ride of the Month Challenge!

1 - 4 of 4 Posts

·
Registered
Joined
·
689 Posts
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.
 

·
Registered
Joined
·
30 Posts
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
 

·
Mopar1973Man.Com
Joined
·
26,259 Posts
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...
 
1 - 4 of 4 Posts
Top