I'm having an issue with finding a problem with the heat/a.c. controls not changing from vent to floor or anything else. Checked vacuum coming in to controller no vacuum. Can anyone tell me where the vacuum line goes into the dash that goes to the controller. Thanks

 

It comes in where the ac lines go through the fire wall then runs along the side of the ac/heater box up to the controls. Also make sure the check valves are working.

http://dodgeram.info/tsb/1996/24-01-96a.htm

 

I check everyone of them under the hood got vacuum you going through the firewall but at the floor line going to the controller no vacuum. I guess i will have to pull the dash did not want to oh well that's life. Thanks for the reply