Vacuum supply Line 2011 Ranger
 

This is one of two lines going to the vacuum canister. I assume it is the vacuum supply line, but I can't find any fitting within reach on the vacuum manifold. Any ideas?
https://cimg3.ibsrv.net/gimg/www.ran...76fca84be0.jpg

Yes, that's the check valve for the vacuum reservoir, the hard black plastic vacuum line has pulled out of its rubber end fitting
It will be there.............somewhere, looks like a "wire" so your brain/eye often over looks it as what you are looking for

It would have had to reach to the check valve so feel around, cold engine, for a loose "wire" end, it may not be a dedicated line back to manifold, might be on a "T" fitting

And worst case you can always make your own vacuum tap to existing source, but old "lost" line is a vacuum leak at this time

https://cimg7.ibsrv.net/gimg/www.ran...155bf50731.jpg
I hope this picture helps better....thank you