Aux input added via tape deck hack, noisy now..

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Feb 10, 2017
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Any advice on eliminating the buzzing noise after connecting an aux in to the tape deck? I'm guessing it's a grounding issue. I originally grounded it to the tape deck board, and I have tried a few different locations with no luck. I even connected to the battery ground and it got worse. Thanks for any input.
 
Did you consider adding a ground loop isolator into the cable to the music source?
 
For me, when I did a similar audio mod in my Volvo XC90 into the AM input, The sound was good until I charged the phone simultaneously while playing music was an awful noise came thru and when I disconnected power, it sounded clear, so I ordered the ground loop isolator did wonders! however not less than a week after completing this sick mod, the engine broke and the truck was sold.
 
For me, when I did a similar audio mod in my Volvo XC90 into the AM input, The sound was good until I charged the phone simultaneously while playing music was an awful noise came thru and when I disconnected power, it sounded clear, so I ordered the ground loop isolator did wonders! however not less than a week after completing this sick mod, the engine broke and the truck was sold.
Damn... sorry to hear that!
 

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