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<blockquote data-quote="krisfnbz" data-source="post: 8301102" data-attributes="member: 570594">Ok, so I figured out the 80prs cars issue, it was minor. That problem is solved.However, my gf&#039;s car has a very big annoying whine and im stuck. My car was very very minor, her car is obnoxious. This is what I have done to the car. Upgraded the battery ground with 2 gauge wire, sanded down contact point. Ran a new ground wire directly from the battery to the radio, also grounded the RCA&#039;s of the back of the radio with that same ground wire. Ground spot for the amplifier in the trunk is the rear strut bolt which is also sanded down. Her headunit is the DEH-X6500bt. Im pretty sure that when I wired the car 4 years ago that I wired power and RCA on opposite sides, but im not too sure. I also put int a ground loop isolator just to see... and that absolutely nothing.The only thing I can think of is to put a different non-pioneer radio in and see what happens.</blockquote>

[QUOTE="krisfnbz, post: 8301102, member: 570594"] Ok, so I figured out the 80prs cars issue, it was minor. That problem is solved. However, my gf's car has a very big annoying whine and im stuck. My car was very very minor, her car is obnoxious. This is what I have done to the car. Upgraded the battery ground with 2 gauge wire, sanded down contact point. Ran a new ground wire directly from the battery to the radio, also grounded the RCA's of the back of the radio with that same ground wire. Ground spot for the amplifier in the trunk is the rear strut bolt which is also sanded down. Her headunit is the DEH-X6500bt. Im pretty sure that when I wired the car 4 years ago that I wired power and RCA on opposite sides, but im not too sure. I also put int a ground loop isolator just to see... and that absolutely nothing. The only thing I can think of is to put a different non-pioneer radio in and see what happens. [/QUOTE]

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