go join dodgeforum.com or dodgetalk.com tons of info and you will learn everything you ever need to know about your truck...... GO JOIN NOW!!!!!!!!!!! : ) when you do, post that you learned about it from here....... manuals can help at times and other times not especially if you dont know what youre really dealing with in the 1st place, but a person on a forum can provide better pics and let you know if what youre doing is good or bad
There is a Book Publisher called CHILTON..that was always my solution..
You should also look for a Part#..TAG..maybe on your wiring harness..
..I haven't worked on cars since the 1970's..but I think you may mean..Intake Manifold Vacumn..which I believe in these days..requires a TEST Equipment solution.