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Car speakers and ground wires

My speakers have a really bad humming noise and I have an extra batterie in my trunk with my positive wire going from my under hood batt. to my trunk batt. then my ground from the trunk batt. to under the car the a shorter ground going to a self tapping screw in my trunk. But now when my system hits it makes my batt. gauge needle jump back and forth and my head lights go dim. What is the problem?

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  • What gauge is the wire used to route your battery + and - ?
  • What does audio your system consist of?
There could be several things happening. The hum is most likely from a ground loop or bad ground of some kind. Search the web for a "ground loop isolator" and pick one up.

The dimming sounds like there's just too much draw on your batteries for the wiring and system that you have. If the wire used to connect amp to battery and battery to battery are too small, there will be too much voltage drop in the wire. Plus, if your system is giant, you may have to add a 1 farad capacitor (or larger) or a high output alternator to your system to keep up with the power draw by the amp(s).

Posted on Mar 18, 2008

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Trying to find a wiring diagram to install my kenwood kdc-mp342u into my 2001 grand am. any ideas?


Please let me know if you have any questions, and thanks for using FixYa.

2001 Pontiac Grand Am Car Audio Wiring Diagram kenwood kdc-mp342u
Car Radio Battery Constant 12v+ Wire: Orange yellow
Car Radio Accessory Switched 12v+ Wire: none
Run a wire to the fusebox for switched power. red
a 14 gauge wire will do--use a 15 amp fuse
Car Radio Ground Wire: Black/White black
Car Radio Illumination Wire: Gray (tape this wire off) none
Car Stereo Dimmer Wire: Brown (tape this wire off) none
Car Stereo Amp Trigger Wire: Pink blue
Left Front Speaker Positive Wire (+): Tan white
Left Front Speaker Negative Wire (-): Gray white/black
Right Front Speaker Positive Wire (+): Light Green gray
Right Front Speaker Negative Wire (-): Dark Green gray/black
Left Rear Speaker Positive Wire (+): Brown green
Left Rear Speaker Negative Wire (-): Yellow green/black
Right Rear Speaker Positive Wire (+): Dark Blue purple
Right Rear Speaker Negative Wire (-): Light Blue purple/black

Amplifier Mounted behind trim in the left side of the trunk.

May 19, 2011 | Kenwood Car Speakers & Subwoofers

1 Answer

Wireing for delco stereo modle 21022997


Hope this helps!
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Oct 08, 2010 | Car Speakers & Subwoofers

1 Answer

I have hooked up my subwoofer and amp to my factory stereo in a 2011 camry. My power wire is hooked directly up to my battery, my ground to the chassis and my remote to my fuse. I have my RCA wires (RCA on...


Rewire your stereo cables as such:

Red- positive - battery
Black - ground - chassis
Remote (Yellow) - ignition switch

The "LINE OUT" should go to your SUB-WOOFER.

The while-lined wires paired with the solid colored wires are either your Front LR and/or Rear L/R.

Jun 14, 2010 | MTX Thunder 4500 T4510-04 Car Subwoofer

1 Answer

Need the color codes for the factory harness


Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

there ya go. let me know if that helps ya.

May 09, 2009 | Car Speakers & Subwoofers

1 Answer

I need to know which factory wires are hot and ground so I can install a new radio without a wiring harness


what you are going to need is the wiring diagram... either car manual might have it or a local car audio place might have it... obviously the charge you for it... usualy for newr cars you can find it for free just by researching it on google... i found this for you duno if it helps... just code the wires and cut them to make your new bridge to the unit without a harnest
Have fun
goodluck

1991 Chevrolet Caprice Car Radio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: Pink
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4′ x 6′
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6′ x 9′
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Apr 28, 2009 | Car Speakers & Subwoofers

1 Answer

How to wire a kenwood kdc d300


All components on your Amplifier should be labled. Ground Will go to any ground on your Vehicle Ex. A bolt under your trunk floor cover. Power has to be ran from your positive terminal onto your batter and throught the interior of your car to your amps 12v +. The MEMORY TERMINAL IS NEEDED FOR FUNCION! It will be between Ground and POWER or NEXT TO POWER.. This has to be ran to your cd players BLUE MEMORY wire or you can bypass it directly to the POWER, WARNING!!! if you use the bypass method, put a switch that you can pick up from any autozone or such between the two points to shut off the amp, other wise it will run constatly and kill your battery. The two RCA's have to be plugged into the back of your cd player and ran back to your amp and plugged into the Primary Slot (red-white) and finnaly the +.- speaker wires need to be ran to your subwoofers. Once all conected pop in a cd, adjust your cd players bass settings and also adjust your lows, mids, and highs on the amp to fine tune your speakers. IF you are looking to maximize your speaker wattage, you can use the bridge teqnuiqe. But beware you are going to doubble the ammount of power into each speaker. Take both positives, or if only one speaker just the single possitive, and place it into the Right SPEAKER insert on the Amp, and take both negitives and place it into the LEFT SPEAKER insert, and run the wires like normal to each speaker, 1 wire per - one wire per positive, in doing so both speakers run using maximized power usage

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1 Answer

Sterio system


check your rca cables, amplifier grounding. might be loose.. else try to re orient the wires so that the power wires aren't close to the input and speaker output wires.

May 09, 2008 | Car Speakers & Subwoofers

3 Answers

Subwoofer Ground Wire Problem


there is also the possiblity of a ground potential problem you could try running a wire from the ground point of the amp to the rear of the head unit, in this way both components have the same ground potential....second , I would take the ground loose a the point you have connected to the vehicles chassis , i then would prepare the surface by sanding a quarter <25 cent piece> area and using two washers and nylon insert lock nut, and a bolt to securely fasten your ground ,,,,also I would use a grounding wire equal too or 2x teh ga you are using for your power < battery > cable.....and lastly I would reduce the input sensitivity to your amplifier, because if u have them turned up < more sensitive> the amp will amplify abient electrical noise present in your vehicle... if this helps let me know , if it does not let me know...

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