1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Pioneer 7900 stereo is humming?!!

Discussion in 'Audio & Video' started by razz8085, Apr 3, 2008.

  1. Apr 3, 2008 at 11:41 PM
    #1
    razz8085

    razz8085 [OP] Member

    Joined:
    Apr 2, 2008
    Member:
    #5708
    Messages:
    10
    Just installed a new Pioneer DEH-P7900BT. Already a huge improvement over the stock unit but the stereo is producing an annoying humming sound. It is not coming from the speakers and does not fluctuate with the engine. I've had that problem in the past and this is not the same thing. Has anyone had this problem or know where it might be originating from? Thanks.
     
  2. Apr 3, 2008 at 11:53 PM
    #2
    eordonez

    eordonez Living vicariously through mjp2

    Joined:
    Mar 17, 2008
    Member:
    #5340
    Messages:
    8,341
    Gender:
    Male
    First Name:
    Ed
    Chihuahua, Mexico
    Vehicle:
    TRD Sport Dcab 4x2 Black Sand Pearl
    OEM All Weather Mats, wheel locks, Toyota Silver Tube steps.....
    maybe bad grounding is my guess
     
  3. Apr 4, 2008 at 3:40 AM
    #3
    cmfranks

    cmfranks Well-Known Member

    Joined:
    Dec 18, 2007
    Member:
    #3882
    Messages:
    304
    Gender:
    Male
    First Name:
    Craig
    Austin,TX
    Vehicle:
    08 DC Pre-Runner 6in Pro Comp Lift
    BHLM, Pro Comp Skid Plate, AFE Drop in Air Filter, Tint, Pioneer AVH 4000 DVD,Polk Audio 6.5 components, Polk 6.5 co-ax's, Polk Audio 400.1 amp, Polk Audio 500.1 amp, (2) Polk Audio 10 in Momo subs, Mr Marv sub box, Sockmonkey decals, Redline Elite hood struts, Bak Flip tonneau cover, N-Fab Nerf bars, Painted Center Console & Window/Door Lock Panels Black, Amber LED Dome/Map Lights
    i just had my pioneer 5900 installed and i had a similiar problem (humming and engine noise) i re-checked the ground but still had the same issue. shop installed a tsunami (sp??) filter to my amp and the problem is fixed.

    filters ( had to get 2 ) cost $15.00 each from circuit city

    this might help you
     
  4. Apr 4, 2008 at 3:24 PM
    #4
    lsocoee

    lsocoee My hair is all natural Moderator

    Joined:
    Feb 9, 2007
    Member:
    #872
    Messages:
    10,165
    First Name:
    Hotdog
    Vehicle:
    2007 PreRunner SR5 Double Cab
    Wet Okole Underwear
    It could also be an issue with your antenna. If you unplug the antenna do you still get the noise?

    I'm assuming you aren't running an amp and you are using all the stock speakers/wires.
     
  5. Apr 4, 2008 at 3:56 PM
    #5
    razz8085

    razz8085 [OP] Member

    Joined:
    Apr 2, 2008
    Member:
    #5708
    Messages:
    10
    I was under the impression that you could only hear attenna noise when the radio was on. The hum occurs on any source even when the volume is all the way down.
     
  6. Apr 4, 2008 at 7:28 PM
    #6
    TACOROCK

    TACOROCK Well-Known Member

    Joined:
    May 7, 2007
    Member:
    #1528
    Messages:
    134
    FAYETTEVILLE NC
    Vehicle:
    06 TACOMA LIFTED
    URD SUPERCHARGER 80MM PULLEY, DOUG THORLEY LONG TUBE HEADERS, MODIFIED Y-PIPE, TRUE DUAL EXHAUST MAGNAFLOW 2 IN 2 OUT, PRO COMP 6" LIFT, WIDEBAND 02/FUEL SENSOR, AVIC D3, 2 PIONEER SUBS ON A MEMPHIS 1200 WATT AMP RMS, DIY MOD FOR ALL INTERIOR SPEAKERS FULL TINT, LEER CAMPER, EURO LIGHTS, BILLET GRILL, BULL BAR WESTIN RUNNING BARS, AIR HORN, AND A RADIATOR POPPER
    its simple!!! i know this one! the wire is routed near a power chord and and the hf freqs are causing the hmmmmmm sound.. you can reroute the wires through the side panels... or make sure there is at least 1" space along side the panels.
     
  7. Apr 4, 2008 at 9:07 PM
    #7
    razz8085

    razz8085 [OP] Member

    Joined:
    Apr 2, 2008
    Member:
    #5708
    Messages:
    10
    Okay, I just got the truck so everything is stock except for the head unit which I just replaced. Now which wire is it that you think is next to the power cord (12V constant?) that is causing the humming? I'm using a wiring harness so I'm not sure what side panels you could be talking about unless you thought I was running an amp. With an amp, I always run the power cable and the RCA cables on opposite sides of the car. I really do hope you know the answer. Thanks.
     
  8. Apr 4, 2008 at 9:10 PM
    #8
    TACOROCK

    TACOROCK Well-Known Member

    Joined:
    May 7, 2007
    Member:
    #1528
    Messages:
    134
    FAYETTEVILLE NC
    Vehicle:
    06 TACOMA LIFTED
    URD SUPERCHARGER 80MM PULLEY, DOUG THORLEY LONG TUBE HEADERS, MODIFIED Y-PIPE, TRUE DUAL EXHAUST MAGNAFLOW 2 IN 2 OUT, PRO COMP 6" LIFT, WIDEBAND 02/FUEL SENSOR, AVIC D3, 2 PIONEER SUBS ON A MEMPHIS 1200 WATT AMP RMS, DIY MOD FOR ALL INTERIOR SPEAKERS FULL TINT, LEER CAMPER, EURO LIGHTS, BILLET GRILL, BULL BAR WESTIN RUNNING BARS, AIR HORN, AND A RADIATOR POPPER
    okay misunderstood thaught you were running an amp... however.... did you splice in or use a connector hook up? this will start the trouble shooting process.. we can do it in real time if you would like thru pm
     
  9. Apr 4, 2008 at 9:45 PM
    #9
    razz8085

    razz8085 [OP] Member

    Joined:
    Apr 2, 2008
    Member:
    #5708
    Messages:
    10
    I used a wiring harness. Match up everything as usual. Today I tried to usea noise filter between the constant battery wire and stereo. Also tried grounding the wire to a different location. Still low level hum. Any other suggestions? Wondering if its just a bad unit. Works perfect otherwise.
     
  10. Apr 4, 2008 at 11:05 PM
    #10
    TACOROCK

    TACOROCK Well-Known Member

    Joined:
    May 7, 2007
    Member:
    #1528
    Messages:
    134
    FAYETTEVILLE NC
    Vehicle:
    06 TACOMA LIFTED
    URD SUPERCHARGER 80MM PULLEY, DOUG THORLEY LONG TUBE HEADERS, MODIFIED Y-PIPE, TRUE DUAL EXHAUST MAGNAFLOW 2 IN 2 OUT, PRO COMP 6" LIFT, WIDEBAND 02/FUEL SENSOR, AVIC D3, 2 PIONEER SUBS ON A MEMPHIS 1200 WATT AMP RMS, DIY MOD FOR ALL INTERIOR SPEAKERS FULL TINT, LEER CAMPER, EURO LIGHTS, BILLET GRILL, BULL BAR WESTIN RUNNING BARS, AIR HORN, AND A RADIATOR POPPER
    no probably not...... simple question.... does it do the same when the deck is on with ignition on compared to off meaning running or not?
     
  11. Apr 5, 2008 at 12:23 PM
    #11
    razz8085

    razz8085 [OP] Member

    Joined:
    Apr 2, 2008
    Member:
    #5708
    Messages:
    10
    No difference with the engine on or off. If the stereo is on it hums. I can drown out the sound playing music, but being half asian, little things like that bug me. I've never heard this before on another stereo.
     
  12. Apr 5, 2008 at 12:51 PM
    #12
    lsocoee

    lsocoee My hair is all natural Moderator

    Joined:
    Feb 9, 2007
    Member:
    #872
    Messages:
    10,165
    First Name:
    Hotdog
    Vehicle:
    2007 PreRunner SR5 Double Cab
    Wet Okole Underwear
    I'm leaning towards a bad stereo. I've had that happen to me before.
     
  13. Apr 10, 2008 at 6:16 AM
    #13
    Viet2100

    Viet2100 Well-Known Member

    Joined:
    Jun 27, 2007
    Member:
    #1930
    Messages:
    2,512
    Gender:
    Male
    First Name:
    Viet
    Delray Beach, FL
    Vehicle:
    2007 Infiniti G35S
    I recently had the DEH-P7900BT, but upgraded to the AVH-P4000DVD. Had humming too, found out it was my external amp had a bad ground.
     
To Top