Blue Vacuum line?
 

Does anyone know where the vacuum line with the blue stripe goes to in A/C heater circuit? thats the last thing i need to find out before i can put the interior back together! any help would be greatly appreciated!

Re: Blue Vacuum line?
 

I can tell you when I get home this evening. I have a shop manual for a '73. I will check back this evening and see if you have had an answer.

Re: Blue Vacuum line?
 

anyone have any info?

Re: Blue Vacuum line?
 

Sorry it took so long to get back with you. My book shows a dark blue vacuum line. The dark blue goes from the #4 on the switch for the off, ac,vent,heat,bi-level,def. This is an aluminum vacuum switch that is controlled by your top slide control on the control panel. The dark blue goes from there to the vacuum diaphram actuator for the defrost located under the dash. Hope this helps. Let me know if you have any more questions.
Mike