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Thread: AUX IN Altenator Noise

  1. 11-08-2006, 01:30 AM #1
    vipervin
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    AUX IN Altenator Noise

    I have an Eclipse CD5423 HU with mini-jack AUX IN. I wired that straight to my headphone output on my laptop. However, I get an annoying alternator hum/noise in my music. I bought this from Crutchfield: http://www.crutchfield.com/S-JgyVrJf...er&i=127SNI135
    but it barely made an improvement.

    Regular music through a CD works fine, it is just through the AUX-IN plug. I am running an IBM ThinkPad X24 notebook connected to Carnetix P1900 DC-DC regulator.

    Any suggestions?
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  2. 11-08-2006, 01:45 AM #2
    Eternalodyssey
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    Check your ground wire going to your head unit. Also, you might want to make sure your ground wires are of the correct gauge. If your H/U isn't grounded directly to the chasis of your vehicle, try grounding it straight to the body of your vehicle. grounding tips.
    Check out the updates. Project 2003 Dakota worklog: http://www.mp3car.com/vbulletin/worklogs/85490-project-2003-dodge-dakota.html


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  3. 11-08-2006, 01:51 AM #3
    vipervin
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    I used the grounding wire on the wiring harness, but I will try grounding to the same point as the P1900 (which is on the chasis).
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  4. 11-08-2006, 06:45 AM #4
    blkwrx
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    Induced noise/Ground loop trouble shooting guide.
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  5. 11-08-2006, 01:04 PM #5
    Shadow
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    Does it happen if you unplug the charger for the laptop?
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  6. 11-08-2006, 09:20 PM #6
    vipervin
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    Then my laptop turns off because I took the battery out. Laptop is powered by the AC plug. But when the computer is off, there is no noise.
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