plug on fan shroud near intake???

[U235a4]

what is this for because when I was installing a stock intake on my truck today I noticed nothing was plugged in. I did find the other end by the fuel filter and plugged it in. I never had a mil light other than a running issue previously stated and the last two days here, it did get up in the 50s and the truck didn't run as good. I'm assuming the fan, and if I'm right what issues other than over heating would this cause by not being plugged in aka injection wise.

[sinner6.0L]

definitely the clutch fan connector. very easy to forget to plug in and i'm pretty sure while it will set a dtc it won't set a check engine light. there should be a little tab on the stator for it to slide onto but usually that's broken off

[U235a4]

well I don't know if plugging in the fan clutch or the stock air filter setup over the K&N intake setup, but the truck ran a whole lot better. More responsive, more power and a lot smoother.