Question about Jl Audio 300/4 Car Audio Amplifier

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The red light on my amp??

I wired up my amp to my stereo an and every thing was work ing ok but i move the amp and the ground cable came out while it was on and everytime i turn it on the red light comes on. how do i fix it??

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  • nicholas frost Nov 12, 2007

    i have tried reseting the ground and checked the fuses but it still comes on???

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Try turnning off and reset the ground, posibly blew a fuse or something and needs repair....if repairs are needed i would take it to a professional.

Posted on Nov 12, 2007

  • cory casper
    cory casper Nov 12, 2007

    take the amp in for repairs

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Radio wire diagram for 2011 Mazda 3


2011 Mazda 3 Car Stereo Wire Harness Color Codes
Car Radio Battery Constant 12v+ Wire: Brown
Car Radio Accessory Switched 12v+ Wire: Light Blue
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Light Green
Car Stereo Antenna Trigger Wire: Black
Car Stereo Amp Trigger Wire: Light Blue
Car Stereo Amplifier Location: Under the Passenger Seat
Left Front Speaker Positive Wire (+): White/Yellow
Left Front Speaker Negative Wire (-): Blue/Green
Right Front Speaker Positive Wire (+): Red/Blue
Right Front Speaker Negative Wire (-): Red/White
Left Rear Speaker Positive Wire (+): White/Light Green
Left Rear Speaker Negative Wire (-): Pink/Brown
Right Rear Speaker Positive Wire (+): Light Blue/Brown
Right Rear Speaker Negative Wire (-): Light Green/Light Blue

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Cant get remote wire to turn on amp. it is running from back of kenwood deck to kenwood amp.


OK ! FIRST THINGS FIRST. DID U TEST THE AMP FIST. BEFORE U STARTED INSTALLING RCA CABLES,AND REMOTE WIRES. LETS DO THAT FIRST.GRAB YOUR AMP.SET IT ON YOU WORK BENCH ,TABLE,OR CHAIR.THEN GET (2)PIEACES OF #10 OR #12 WIRE W/1 OF THE WIRES HAVING A 20AMP FUSEABLE LINK ON IT.NOW THE WIRE W/THE FUSEABLE LINK ON IT.CONN THE REMOTE(REM) AND THE 12v + ON THE AMP AND HOOK THEM BOTH TOGETHER ON 1 SIDE OF THAT FUSEABLE LINK WIRE. AND THE OTHER WIRE HOOK IT UP THE - GROUND SIDE OF THE AMP .NOW PICK UP YOUR AMP OPEN UP YOUR HOOD.MAKING SURE THAT NO WIRES OR THE AMP IS TOUCHING THE + 12V OF THE BATTERY. NOW CONN YOUR GROUND TO GROUND AND THE FUSEABLE LINK ON THE +12v SIDE OF THE BATTERY.NOW THE AMP SHOULD HAVE CAME ON. LOOK 4 A SOLID RED LIGHT OR ANY SIGNS OF A SOLID LIGHT THAT HAD CAME ON.

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Today i turned on stereo system driving in my car, and i have 2 12"inch t1 Rockford in a box with kicker zx300.1 it all hooked up on my car for like weeks ago and work great, but today it stop working...


Hello charlietmn,

First off you need to turn your vehicle on, turn the stereo on. Go back and look at the amp. Do you see a power light on ? Is it green or red ?
If there is no light or a red light on, your amp is not getting power or is not grounded correctly in which you can try the following:

Check and make sure your ground cable is grounded properly. It should be attached to your vehicles frame on bare metal.

You can also check your fuses, in your amp, and in the power cable for the amp.

In my experience installing car audio, those are the two most common simple issues.

Post back after you've checked the things I mentioned. I will assist you further if you need further help. Thank you for choosing Fixya and have a great day.

-Daniel

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1 Answer

Led light turns red and the turns off but the amp


In Car Amplifiers have 3 main power wires:
Live +12v (Fused wire direct from the + side of the cars battery)

Ground (Direct to car earthing point (anywhere cleaned of paint for good connection)(I tend to use boot lock)

Remote (This wire should be connected with the switched live wire coming from the back of the stereo, this is Only live when the cars ignition is on)(there should be 2 power wires coming from the stereo usually red live +12v and yellow switched live, depending on the cars original wiring, try moving the remote wire from where you have it, to the other live wire

Hope this is of some help
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Hi, the only way i can see the amp resets the stereo is that power is dropping. The amp should have its own wires directly to power/battery so as to not affect anything else.

On the protect, try to disconnet all the speakers, make sure the power is OK. If it appears to work, the there could be a problem with speakers/cables. Try a different speaker to see if it works. If the problem continues with speakers off, a different speaker etc, then there is a problem with the amp. Hope that helps

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Dont know what model you have so here u go!

1995 Jeep Wrangler Car Stereo Radio Wiring Diagram.
Car Radio Constant 12V+ Wire: Red/White
Car Radio Switched 12V+ Wire: Purple/White
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Blue/Red
Car Radio Dimmer Wire: Red/Black
Car Radio Antenna Trigger Wire: N/A
Car Radio Amp Trigger Wire: N/A
Front Speakers Size: 4′ x 6′
Front Speakers Location: Dash
Left Front Speaker Wire (+): Gray
Left Front Speaker Wire (-): Yellow
Right Front Speaker Wire (+): White/Red
Right Front Speaker Wire (-): Brown/Red
Rear Speakers Size: 4′
Rear Speakers Location: Rear Roof
Left Rear Speaker Wire (+): Gray/White
Left Rear Speaker Wire (-): Brown/White
Right Rear Speaker Wire (+): White/Black
Right Rear Speaker Wire (-): Brown


1995 Jeep Cherokee Car Radio Stereo Audio Wiring Diagram
Car Radio Constant 12v+ Wire: Pink
Car Radio Switched 12v+ Wire: Violet/White
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Light Blue/Red
Car Stereo Dimmer Wire: Orange
Car Stereo Antenna Trigger: N/A
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 (+): Dark Green
Left Front Speaker Negative Wire (-): Brown/Red
Right Front Speaker Positive Wire (+): Violet
Right Front Speaker Negative Wire (-): Dark Blue/Red
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown/Yellow
Left Rear Speaker Negative Wire (-): Brown/Light Blue
Right Rear Speaker Positive Wire (+): Dark Blue/White
Right Rear Speaker Negative Wire (-): Dark Blue/Orange

1995 Jeep Grand Cherokee Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: Red/White
Radio Switched 12V+ Wire: Red/Gray
Radio Ground Wire: Black
Radio Illumination Wire: Blue/Red
Radio Dimmer Wire: Orange
Radio Power Antenna Trigger Wire: Green/Red
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: 6 1/2′
Front Speakers Location: Doors
Left Front Speaker Wire (+): Green
Left Front Speaker Wire (-): Brown/Red
Right Front Speaker Wire (+): Purple/Yellow
Right Front Speaker Wire (-): Blue
Rear Speakers Size: 6 1/2′
Rear Speakers Location: Rear Doors
Left Rear Speaker Wire (+): Brown/Yellow
Left Rear Speaker Wire (-): Brown/Light Blue
Right Rear Speaker Wire (+): Blue/White
Right Rear Speaker Wire (-): Blue/Pink
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1 Answer

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