jstorm

I bought a used mint condition 2007 F-150 Lariat Supercrew at a Denver dealership a couple weeks ago. It came from an AZ auction. Since I brought it home I've noticed that when the headlights are on there is a very noticeable whirring noise that stops when the headlights go off - manually or automatically. It is coming from the engine compartment - seems it's somewhere on the right side of the block but I can't pinpoint it. I thought I'd ask here if this is normal before I take it to Ford and be charged for a diagnosis - over the phone, they have no idea. I'm concerned it's not normal and that something will eventually fail while I'm out driving (lights at night would not be a good thing to fail).

650NutKase

Do you have LED headlights? Could be the fans on the back of the LED bulbs. Mine do that all the time and it's normal.

elricfate

100% sounds like LED heads with fans.

jstorm

I'm 90% sure that's what it is. Sound coming from headlight area on both sides. Haven't verified by looking at the bulb through the lens yet.

Shaneb

Definitely your LED's.. Mine do the same, its normal