I got a vacuum line on my 2004 Ford F150 that is just hanging loose. Its near the ABS Module thingy on the driver side. There looks to be two, one goes down and over towards the passenger side, and this one seems to just come up and stop right at the ABS module, however its unplugged and I can't figure out where it goes. Does anyone know? My ABS light was on yesterday for a bit, it went off and on, had the codes read and it was something to do with the rear abs sensor malfunctioning, and no network communication, but it hasn't been on since, however my truck is running a tad bit sluggish when accelerating, and I gotta figure its that vacuum line. I just had my phasers done and I assume it must of been knocked loose during the guy working on it.

 

if this is a 4x4 this could be the vent hose...it is strictly to vent pressure from hubs...not hooked to anything

 

 

It's got suction to it.

 

im pretty sure its one of two of those lines that is not hooked to anything.