hello, i am new to this so please bear with me. i just recently purchased a 2002 fx4 4x4, the 4wheel drive is not working. while troubleshooting the problem i found three vacumn hoses disconnected, one of them coming from the front diff. i reconnected the two colored lines, but cannot figure out where the larger black hose connects to. can anyone help me out. i dont know if it matters but my truck has the shift in the floor for the 4x4 instead of the switch on the dash

 

Check your fuse under the hood. It's a square one. I believe a 15A