I need some thoughts on how to find a noise. Its very faint, but def audible. It sounds like its coming from somewhere around the front (inside) passenger area, or maybe the passenger side mirror. It generally occurs at ~1500-1800rpm. It sounds just like when a light spring is vibrated, or electrical signal interference on the radio (its not the radio though). its a soft "zzzZZZZIIiiiinnnnggg". if fades in then out. I think its a spring, but I am not finding any springs unless there hidden (are there springs in the outside mirrors?). Or something under the dash maybe? we have 'touched' everything easily touchable to try and locate the sound. its so high pitched though its very hard to locate. The book is not much help in this regard. So maybe someone with more insight as to how things are put together may have some thoughts hopefully.