Please help with alternator whine in speakers and popping noise when powering on/off.

[secondchance]

Originally Posted by aod

And alternator whine is back. It came back last night while just driving around. It doesn't pop when turning on or off though. Can these ground loop isolators go bad? I'm worried the alternator is on its way out but hoping for just needing to replace those isolators.

First, turn the volume down to zero. Do you still hear the whine with engine idling? If yes, get close to all 4 speakers and see if you hear the whine on all four or one or two speakers. If you hear the whine on one speaker, disassemble and scrape 6 pins on the amp where the harness plugs in. You might have poor connection.

Good luck!