Iacv wiring help (1 wire)

[zenki 95]

Okay, not sure if photo uploaded but I found a blue/red stripe wire that comes from the iacv four pin plug. Found it cut in the middle of my harness. I have no clue where it goes and have 3 fsm 180sx, s14 usdm and jdm and haven't figured it out.

I have a s14 with a s13 sr
62 ecu