Sorry if this has been posted before... Squeaks

There a dozons of things that can be the source. The best thing you can do is to have some joust the car while you go searching. Until you isolate the area, it’s a crap shoot.

 

Um, reading your post, I got a vivid mental image of a knight in shining armor heading full tilt at a Prius with his lance lowered, which was fun as I thought it was a toss up as to whether "old tech" or "new tech " would win.

But seriously, what we used to do so try to isolate squeaks on the rattletraps we drove, was to have the biggest, beefiest guy in our gang kind of use their hands and weight to bounce each corner of the car up and down. You try to time those pushes rhythmically to get maximum ultimate motion of the body and suspension , to see if you can re-create the squeak. If you can get it at all, then try the same thing with the hood up to get better localization of the source of the squeak. We typically spayed or dripped used motor oil over every contact point that was even remotely suspicious, but there are much better products such as spray silicone lubricants nowadays. I suspect you were also referring to a systematic process like that, because squeaks are damnably hard to locate and stop sometimes.

 

Dawn... not only does it saves scores of birds and wild life from OIL slicks, it’s also good for finding squeaks. A lite solution in a spray bottle works well.