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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.
Check for vacuum on the outboard port of the CAD actuator while engine running, t-case in 2wd. Should be pretty strong. Illustration here of how things work.
You have to determine if the cad is moving or not. The 4WD indicator should be off when in 2WD. The cad has to move into the 4WD position to trigger the switch. Check the vac at the cad both in 2WD and 4WD. It should be the same. I believe there is a check valve on the vac line that goes to the t case. Check and see if it is working. It allows (and holds) vacuum to pass to the t case/cad.
I noticed that one of the tubes from the switch goes to a plastic line and there is another plastic line Identical to it could there not be a line attached that's doing it?
The plastic lines come from the the switch on the t case. They then go to the metal lines that run along the frame to the cad. Did you read my last post? Check vac at the cad!
