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2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
4, one is source vacuum, and other is a vent, (just goes up behind the motor, and ends.) Other two go to the CAD actuator on the front axle. Have a look here for how the system works.