I put in a new lift pump on my 2000 Ram 2500 4*4 (the 4th in 115k) and I knocked a vacuum line loose and I can't find where to connect it. LH side just below the windshield at the hood seal there are 2 lines, I knocked the the larger one loose on the lower end where ever that is. If there is a diagram I could find that may help also, because my 4*4 won't engage either and I suspect it is vacuum problem for I have had the 4*4 problem before.
Thanks

 

Grab the factory service manual from the FAQ section, and have a look in there. I am assuming you have a diesel, as you are talking about lift pumps........ Everything I know about der diesel is written on the inside of my left eyelid......