Reply to thread

Message: <blockquote data-quote="ttocs" data-source="post: 1316745" data-attributes="member: 11896">have you tried grounding the shield on the rca's?  I know at one point pioneers were having issues with engine noise that was caused because of a pico-fuse(itty bitty fuse) that would blow if you grounded the center pin of the rca's after it had been powered up.  Something to do with the caps internally would discharge, blow the fuse and then you would have engine noise.  This could often be fixed by simply pulling apart the rca connections just enough to slip a wire between the outer shields and then grounding that wire. I can't tell you how many cars I have chased audible tachometers in, but I can tell you how many were fixed with a ground loop isolator - ZERO.  I have heard of people putting them in and fixing stuff but I think that they just didn't fix what the problem was, just put a band aid on it.  There was only ever one car that I was not able to find the cause of the noise and fix and that was because he made us use the stock radio and then amped the hell out of it.</blockquote>