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

HU Ground

Discussion in 'Audio & Video' started by stanbp64, Jan 15, 2013.

  1. Jan 15, 2013 at 11:05 AM
    #1
    stanbp64

    stanbp64 [OP] Well-Known Member

    Joined:
    Jun 9, 2012
    Member:
    #80394
    Messages:
    132
    Gender:
    Male
    Greenville, SC
    Vehicle:
    2011PreRunner Sr5
    Where have you guys found to be the best place to ground an aftermarket HU? Chasing some noise on my system and the stock radio ground doesn't seem to be good enough. Thanks!
     
  2. Jan 15, 2013 at 11:15 AM
    #2
    cdk

    cdk Well-Known Member

    Joined:
    May 22, 2012
    Member:
    #79309
    Messages:
    300
    Gender:
    Male
    First Name:
    Chris
    san angelo,tx
    Vehicle:
    2012 PreRunner TSS
    BruteForceFab rear bumper, Ranch Hand front grille guard w/ led lights, leds here and there, seat covers, dash cover, console and handle covers, weathertechs, upgraded audio system, bed mat
    i just hooked to factory harness, but you might be able to connect to one of the 4 screws you take out to pull the headunit.
    i'm not sure if those are grounded or not.
     
  3. Jan 16, 2013 at 8:07 AM
    #3
    kevinsc

    kevinsc 2012 dbl cab 4x4

    Joined:
    Sep 18, 2012
    Member:
    #87202
    Messages:
    812
    Gender:
    Male
    First Name:
    kevin
    columbia, south carolina
    Vehicle:
    12 4x4 dbl cab
    chrome on front painted to match, satoshi grill done by myself, BHLM, billys all the way around with ome springs upfront and LR ucas with wheelers 3 leaf progressive pack in the rear, mb gunner wheels powdercoated black on 285/75r16 nitto trail grapplers, tinted all the way around and on windshield, pioneer dbl din touch screen with two 10's behing the seat and new speakers all the way around and certain interior parts painted to match, also have a road wire leather kit black with red stitching sitting here waiting for me to find time to install it!
    do you have jbl or standard speakers?
     
  4. Jan 16, 2013 at 2:16 PM
    #4
    stanbp64

    stanbp64 [OP] Well-Known Member

    Joined:
    Jun 9, 2012
    Member:
    #80394
    Messages:
    132
    Gender:
    Male
    Greenville, SC
    Vehicle:
    2011PreRunner Sr5
    I've got Alpine component speaks in front and some Kenwood 3-ways in back. Also using an Alpine kpt-445U 45watt amp. And as i stated, the stock harness ground doesn't seem to be good enough.
     
  5. Jan 17, 2013 at 11:59 AM
    #5
    kevinsc

    kevinsc 2012 dbl cab 4x4

    Joined:
    Sep 18, 2012
    Member:
    #87202
    Messages:
    812
    Gender:
    Male
    First Name:
    kevin
    columbia, south carolina
    Vehicle:
    12 4x4 dbl cab
    chrome on front painted to match, satoshi grill done by myself, BHLM, billys all the way around with ome springs upfront and LR ucas with wheelers 3 leaf progressive pack in the rear, mb gunner wheels powdercoated black on 285/75r16 nitto trail grapplers, tinted all the way around and on windshield, pioneer dbl din touch screen with two 10's behing the seat and new speakers all the way around and certain interior parts painted to match, also have a road wire leather kit black with red stitching sitting here waiting for me to find time to install it!
    try taking a small piece of wire and while the vehicle is on and has the noise your trying to find touch one side of the wire to a good ground and the other side to the metal piece of the rca where it is pluged in to the radio.. and let me know if it fixes it... it doesnt matter which rca just touch it to one of them and let me know if it helps and we can go from there..
     
  6. Jan 17, 2013 at 4:46 PM
    #6
    stanbp64

    stanbp64 [OP] Well-Known Member

    Joined:
    Jun 9, 2012
    Member:
    #80394
    Messages:
    132
    Gender:
    Male
    Greenville, SC
    Vehicle:
    2011PreRunner Sr5
    Hey Kevin, I actually have the rcas at the HU grounded to the factory ground now(thru the harness). I am pretty sure I tried grounding them to another spot by doing what you said. I have a Pioneer AVH-P2400BT HU and I have read all about the "pico fuse" problem. I was certain that was my problem but the normal grounding of the rcas hasn't helped.
    The noise is definitely coming from the charging system because when i turn key to first position it is not there. In the next position it is, as well as when the truck is started. I don't know if you have ever noticed it or not but if you turn the key to the second position and lift the hood you can hear the charging system(altenator) buzzing/whining.(at least on mine and my wife's Tacoma) This is the sound that i hear thru speakers if i cut the gain on the amp up much at all.
    Right now i probably have the gains on the amp at less than a quarter and while it sounds good and is probably not that far off from where they should be- if I turn gains up any more i hear the whine in between tracks or during quiet parts of the music. It just bugs the hell out of me.
    Sorry for the lengthy post but I wanted to try and give an explanation of what is going on. I'm getting tired of pulling the HU out too---I have trouble getting it all back in with all the wires and such. Thanks for looking!!

    Stan
     
  7. Jan 17, 2013 at 4:48 PM
    #7
    Aw9d

    Aw9d That one guy

    Joined:
    Nov 7, 2011
    Member:
    #66635
    Messages:
    12,646
    Gender:
    Male
    what is your amp grounded too?
     
  8. Jan 17, 2013 at 5:14 PM
    #8
    stanbp64

    stanbp64 [OP] Well-Known Member

    Joined:
    Jun 9, 2012
    Member:
    #80394
    Messages:
    132
    Gender:
    Male
    Greenville, SC
    Vehicle:
    2011PreRunner Sr5
    The amp was gounded to the factory HU ground thru harness but I have since move it to a screw in the firewall--I don't know what it's for but plenty of metal contact. Amp is installed in glove box. The amp is designed to work off the HU power and ground and speaker wires.
     
  9. Jan 19, 2013 at 6:11 AM
    #9
    kevinsc

    kevinsc 2012 dbl cab 4x4

    Joined:
    Sep 18, 2012
    Member:
    #87202
    Messages:
    812
    Gender:
    Male
    First Name:
    kevin
    columbia, south carolina
    Vehicle:
    12 4x4 dbl cab
    chrome on front painted to match, satoshi grill done by myself, BHLM, billys all the way around with ome springs upfront and LR ucas with wheelers 3 leaf progressive pack in the rear, mb gunner wheels powdercoated black on 285/75r16 nitto trail grapplers, tinted all the way around and on windshield, pioneer dbl din touch screen with two 10's behing the seat and new speakers all the way around and certain interior parts painted to match, also have a road wire leather kit black with red stitching sitting here waiting for me to find time to install it!
    just thought about this.. i have had a similar problem. in the radio settings do you have the loud on or the eq cut up kind of high? I had the loud on with my last taco and i had a 4 channel amp.. i cut the loud off and adjusted the settings on the radio down then re-adjusted the amp and the noise was gone...
     
  10. Jan 19, 2013 at 12:37 PM
    #10
    stanbp64

    stanbp64 [OP] Well-Known Member

    Joined:
    Jun 9, 2012
    Member:
    #80394
    Messages:
    132
    Gender:
    Male
    Greenville, SC
    Vehicle:
    2011PreRunner Sr5
    I wil give this a try. Thanks.
     
To Top