1. Derailed_75

    Derailed_75 Test Drive

    Messages:
    35
    Location:
    Danville Va
    So I have a had a whining noise since I bought the X. Sounds kinda like I have one of the Pulley bearings going out. Anyway this weekend I put a stereo in it and now I can hear it through the radio. Is that the alternator going out? And why wouldn't I hear it through the factory radio
     
  2. TerryD

    TerryD Total Tease Supporting Member

    Messages:
    2,364
    Location:
    Covington, Va
    Possibly the alternator. Factory radios are generally made better with better electrical filtering. Could also be the routing of the power and ground wires of the new radio.
     
  3. TheCrabby1

    TheCrabby1 Sliders Supporting Member

    Messages:
    961
    Location:
    Burtonsville, Md
    My whining noise didn't start until I did my first Mod and just recently SHE finally just shut up about it !!!!!!!!!!!!!!!!!!!!!!!!!!!! :D:D:D
     
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  4. Derailed_75

    Derailed_75 Test Drive

    Messages:
    35
    Location:
    Danville Va
    Well done some reading and the altenator is the cause, however I'm not sure that means it's going bad.

    The suggestion is to put a noise filter in line with the radio power.

    I just dont understand what it is that making that same type noise under the hood.

    Might just have to take it to a parts place and have them test a few things
     
  5. TerryD

    TerryD Total Tease Supporting Member

    Messages:
    2,364
    Location:
    Covington, Va
    The brushes and commutator wearing can cause arcing which while still charging, creates electrical "noise" which the radio picks up and amplifies.
     
  6. Derailed_75

    Derailed_75 Test Drive

    Messages:
    35
    Location:
    Danville Va
    Do you know if there is a test that will pick that up? I dont have a problem replacing it but already need to do something to the AC compressor. It was not hooked up from the PO
     
  7. Muadeeb

    Muadeeb Bastard Admin from Hell Admin

    Messages:
    16,929
    Location:
    Dallas
    Your radio seems to be a good enough test. Beyond that is some expensive equipment: Spectrum analyzer and o-scope. Loop the radio power lines (not ground) around a ferrite core. 2-3 turns should be a good starting point. Leave the coil close to the radio.
     
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