Feedback Through Stereo Speakers

Discussion in 'Trucking Electronics, Gadgets and Software Forum' started by Raiderfanatic, Sep 15, 2014.

  1. Raiderfanatic

    Raiderfanatic Heavy Load Member

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    So when I listen to my tv, I run an audio cord to the auxillary port on my stereo. But when the truck is running, there is a buzzing noise through my speakers. Even when my blinker is on, it will chirp through the speakers. It only happens on the aux part of the radio. There's no feed back when it's on the XM band, regular radio band, USB band etc... and when the truck is running.

    I've heard of alternator feedback. I'm guessing this must be what is going on but I am not sure why. I just put the new stereo in. The old one had the same thing but not near as bad. Once sound started coming through, it would eliminate the buzz. But now, the sound won't really mask the buzz.

    Appreciate any input on what could be causing this issue and possible ways to remedy it.

    If it matters, 2000 T2000 with an N14.

    Thanks.
     
    silver dollar Thanks this.
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  3. MsJamie

    MsJamie Road Train Member

    X-Country Thanks this.
  4. snowwy

    snowwy Road Train Member

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    when I plug my phone or laptop into auxiliary port. it buzzes pretty bad. with the invertor on. truck don't need to be running. invertor turned off sound works great.
     
  5. Raiderfanatic

    Raiderfanatic Heavy Load Member

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    Has nothing to do with my phone. That product would have no bearing on this issue at all.

    Thanks though.
     
  6. Raiderfanatic

    Raiderfanatic Heavy Load Member

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    Hutchinson, KS
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    Yeah, this is not related to my phone, laptop or invertor. It only takes place when the truck is running and I am using the auxillary port on my radio. I run an audio cable from my tv to my radio so my tv sound comes through my stereo speakers.

    If the truck is not running there is no feedback at all. If the radio is on any other setting, there is no feedback.
     
  7. *Five-0*

    *Five-0* Light Load Member

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    Might want to try a different cable, your cable might have a bad shield in it, or it is picking up noise generated by the electrical system in the truck when the truck is running.
    Also possible is your TV is picking up noise from the power supply and porting it out the audio port when the truck is running. These things can be buggers to trouble-shoot....
     
  8. MsJamie

    MsJamie Road Train Member

    I was just using a phone for an example. That's the exact problem I was having with my phone.

    It doesn't matter what the device is; as long as both it and the stereo are powered by the same source (the truck), you are subject to a ground loop.
     
  9. Cranky Yankee

    Cranky Yankee Cranky old ######

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    a single source ground from the stereo to the chasis should fix that also
     
  10. OFTOTR

    OFTOTR Medium Load Member

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    Toccoa GA
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    Are you using the round stereo type input jack you find on some of the radios, or a USB port?
    Sometimes if it's the headphone looking jack, if you rotate the plug a little, the feedback lessens, or goes away.
     
  11. ThatFlatbedGuy2013

    ThatFlatbedGuy2013 Medium Load Member

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    I've had this issue running an audio cable to my truck from my laptop. It was due to it being hooked up to the inverter. I was told that a pure sine inverter will fix the issue.
     
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