Question about 2000 Dodge Ram 1500 Truck
The System is operated by vacuum motors, the vacuum source is a black plastic vacuum line that comes from the engine bay on the passenger side. Go under the hood and at the firewall locate that black plastic line, follow it along to the plastic vacuum storage tank that holds the vacuum for the AC/Heater control head, pull the line off the storage tank you should hear a loud hissing noise as the vacuum leaks out, if you don't have any vacuum at that tank follow the other line attached to that storage tank it will go to the engine, the system gets its vacuum supply from the intake manifold in the back area, the hose connect to what we call "Vacuum Tree" look for any leaking or damaged/disconnected hoses. If you do have vacuum at the tank then check inside the truck under the dash where the vacuum line comes through the firewall, it may be pinched off, follow that line it goes to the back of the dash control, make sure you have vacuum there. These are all the common reasons for the no function control of the air discharge I have found in my 35 years of wrenching.
Posted on Apr 07, 2011
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Posted on Jan 02, 2017
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