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My amp wont turn on...all fuses are fine...the ground wire touched the 12v

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You probably blew a part inside the amp.

Posted on Oct 13, 2010


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Won't power up

Check for 12v constant and 12v remote. and be sure that u have a proper ground.
Check your speaker wiring for shorts (+ & - wires touching)
check that for shorts between your 12v constant and Ground at amplifier.
If these are fine it may be an internal problem.

Sep 25, 2013 | AudioBahn A6004V Car Audio Amplifier

1 Answer

I have no sound coming from my sub or my back speakers. all the fuses are fine and all connections are fine as well and the blue light on my amp is on. and the it seem the power light and protection light...

With the radio OFF, take a jumper wire and connect from the 12V input to the remote input of the amp to see if it powers on.(BE CAREFUL NOT TO TOUCH THE GROUND). If it does, your remote from the radio is either cut somewhere, or not working at all. If it doesn't turn on then turn on the radio and do the same thing with the jumper wire, if it turns on, then your 12V power from battery is not working, maybe a blown fuse by the battery?

Jul 28, 2011 | Car Audio & Video

1 Answer

The main power wire at the battery heats up to the fuse and the fuse heats up but does not blow it is a 30amp glass fuse. what could be the problem, i have been told its a bad ground?or that my positive...

are you saying the unit wont turn on? if it heats up your ground and power connections are fine as it is completing the circuit. I would deff make sure the ground is as good as can be (sanded off paint and touching raw metal) and if you are using a really small guage wire for your amp that can cause a problem as well. BUT if its not turning on make sure the blue remote wire is correctly connected to both the amp and the head unit.

May 17, 2011 | MTX Thunder 280 Car Amp

1 Answer

I accidentally wired the 12v wire to my ground terminal, and the ground wire to my 12v terminal. A little poof of smoke and the amp won't turn on anymore. Checked my fuse and power supply, all is fine. ...

It look like you burned the power supply in the amp if the fuse is ok
there is a circuit that protect the amp and its possible that it burned
this should not be too expensive to be fixed


Oct 19, 2010 | Jl Audio 300/4 Car Audio Amplifier

2 Answers

Amp wont turn on and theres power to the amp and the fuses are good

check the ground to the amp. then check the remote wire. make sure u have the sub option on ur stereo turned on. if all is wired up correct an u do not have the subs turned on in ur stereo settings then the stereo will not send power through the remote wire an therfore your amp will not power on.

Apr 04, 2010 | Rockford Fosgate Power T3002 Car Audio...

1 Answer

Only one 12v oulet works 2007 Accord

Use a 12v test light, wrap the probe with electical tape, leaving a 1/4" exposed. Touch the probe to
the bottom center contact(+)of the socket, and ground the clip wire to the metal side of the socket.
If the light comes on, check the plug on your device.
If not try another ground, if it still won't come on
check the fuses.On the top of the fuses on each
side of the amp rating stamp 20a/30a etc. you will
see very small metal contacts.
Ground the test light wire and touch the probe to
each side of the fuses. There should be power on both sides, if you have power only on one side the
Fuse is bad. Hope this helps. Good luck.

Jan 21, 2010 | 2007 Honda Accord Sedan

1 Answer

Car amplifier turns on and all the wires are hooked correctly and none of the fuses are blown but it wont push the subs and every thing worked fine until i accedently touched the metal post to the metal...

The first thing to check is the 'peak-on' (switch wire) from the head unit to the amp, normally a Blue wire. If it has 12v when stereo is on the stereo is ok and it is an amp fault but if there isn't 12v then it will be the head unit.

Nov 18, 2009 | Car Audio & Video

1 Answer

Tail lights don't work, although break lights work. when fuses are replaced they burn out as soon as you turn the lights on the fuse goes out.

You have a hot wire shorting to ground.Another words there's a wire that has power(12V) going through it(when you turn on the lights) and it is touching either another wire thats connected to metal(ground) or the 12V wire itself is touching metal causing it to blow the fuse.You or an honest mechanic has to find out all the accesories (like cigarette lighter, electric door locks,and others) that are connected with the light fuse.One of these accesories may have the short thats blowing the fuse.

Nov 03, 2009 | 1996 Honda Accord

1 Answer

Rf top ac on rv keeps blownig the 3 amp fuse

The 3 amp is 12 Volt protection for the control board. If that fuse is blowing instantly, then you have a short in the 12 Volt system somewhere. More than likely it is somewhere between the Thermostat and the control unit. Check to see if you have 12V at the thermostat. If so, then disconnect the red wire from the thermostat and the red wire at the control unit. At the control unit side, use an Ohmmeter to see if you have continuity with ground. If so, that wire is the culprit. If not, reconnect the red wire and continue to the next wire. Do this until you find the wire that is shorted to ground. Of course, the ground wire will not be checked.

Hope this helps,


Jun 29, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

No power to the amp i touched the power wire to the side of the amp

It probably burned a trace on the circuit board.

With the amp hooked up normally and the head unit on (so the amp will have remote voltage), do you read 12v DC anywhere on the case of the amp (black meter probe on the ground terminal of the amp)?

If there is no voltage on the case, confirm that you have 12v on the B+ and remote terminals of the amp (black probe on ground terminal of the amp).

Aug 25, 2008 | Kenwood KAC-9102D Car Audio Amplifier

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