Hi everyone, i noticed that there's a buzzing sound coming from the engine bay area but it's not so easy to tell where the sound is actually coming from. It happens whenever the vehicle is powered on (engine doesn't need to be running). sometimes it's louder than others and it doesn't seem to be coming from radiator fans or fuse boxes. chatgpt suggests IACV which i can check but wanted to see if anyone might know better here. i do believe that i cleaned the iacv relatively recently but maybe the motor or something is going out.

would pulling fuses until the noise stops be a way of diagnosing? if i can't locate the sound?

 

Start by removing the - terminal of the battery --> that will tell you if it is electrical in nature.

Next is to use your two ears to triangulate the source. Also fell, by touching .. just be careful as the item can be hot.

Fuses can certainly isolate an electrical issue, but you then need circuit diagram.

IACV is not really a spinning motor. It has a [what I call a slug] which gets twisted under magnetic field to allow air passage. It can hum but very unlikely.

Salim