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I have a gto- 521 ex and can't get the auto turn on to work. It never turns off even with the no remote wire connected and remote turn on switch set to on. The protect power light is green help! Can't figure it out

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Remove the remote wire and use the auto on button.
you dont need the remote wire.

Posted on Nov 15, 2013

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  • Contributor
  • 33 Answers

U need to hook your remote wire to a wire that is power to it only when your switch is turned on

Posted on Oct 16, 2013

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Posted on Jan 02, 2017

  • 113 Answers

SOURCE: Amp will not turn off and the Remote wire is correct.

check pwm chip ,may need replacing

Posted on Aug 22, 2007

SOURCE: auto amplifier installation

Does the new deck have a blue wire for remote and a blue/white wire also? The blue one is for a power antenna and shuts of when playing discs or axillary inputs. The blue/white is for power amplifiers and stays on when the deck is on. Also be sure the remote wire that goes to the amp is not pinched and grounded out to the frame of the car. Let me know, and be sure to leave feedback or I don't get paid.

Posted on Oct 03, 2007

  • 41 Answers

SOURCE: amp wont turn on

It's possible the ground is not a good connection. Sometimes it may look good but dirt or corrosion builds up resistance creating a voltage drop where the wire is grounded to the frame.

Posted on Jan 26, 2008

tech48
  • 624 Answers

SOURCE: Protect Mode with RCA's

It sounds like you have some DC voltage on the RCA input.

You need to figure out if the problem is coming from the head unit or if it is in the amplifier.

If you have a voltage meter, you can use it to find out very quickly.

Set the meter for DC and for a max level of more than 12 volts. Most meters I use have a 30 volt level. That would be a good setting.

Take the black lead and make sure it is grounded to the chassis of the car or to the ground of the power terminal, be careful and make sure it does not touch anything else.

With the RCA cable disconnected put the red lead on the inner part of the RCA cable and see if there is any DC voltage and then check the ground or outer part of the cable. Do the same for the other channel as well.

It should be very close to zero volts. A couple of millivolts is fine to. Any voltage here will cause the amplifier to go into protect mode, which is what is happening to you. You will then need to have the head unit serviced.

If you have a Pioneer head unit, I have seen many of them with an open ground fuse for the RCA jack. That fuse is a surface mounted fuse and is very small and hard to locate on the main board of the radio. If you do have a Pioneer head unit the voltage may seem OK, but you will have an open ground, but that normally does not put the amp into protect. It makes the audio sound very weak and you would have a loud hum. I can help you with that if it turns out to be the problem.

If the voltage on both the RCA leads is OK, then you need to check the amplifier.

You can put the meter lead on the ground of the RCA jack on the amplifier, if you have anything abnormal there, you have a problem in the amplifier. Be careful checking this because you can easily touch the lead to the chassis of the amplifier at the same time as the RCA ground. Most of the time, if yu have a problem in the amplifier like the one you are having, this check of the RCA ground will result in some DC voltage on it. If it still checks OK, then put the lead into the RCA ground and check the positive part of it. You may need to move the lead around a little to get it to touch the metal inside, it is on the bottom part of the hole inside the jack.

I think you will find that you have some voltage on the RCA inputs of the amplifier. To fix this properly you will need to take it in to be serviced.

Sometimes you can ground the RCA jack ground somehow with a jumper wire and then turn the system on with the RCA cable plugged in and it will seem normal. But you do not want to do that as a repair, only to see if the amp will play. If it does play, you know that the problem is in the pre-amp of the amplifier. That would be the only reason to connect an external ground to the RCA jack. You still have a problem in the amplifier. If it does not play normal, you still have a problem in the amplifier if there was some DC on the RCA jack.

Sorry this answer is so long, but the problem you are having will require service of one of your units, you just need to know which one it is. If your inputs get grounded, you will not have the amp go into protect, you just won't hear anything.

Let me know if you need more help and if this was helpful to you a good rating is always appreciated.

Posted on Jun 22, 2008

  • 899 Answers

SOURCE: Amp won't turn on

disconnect audio inputs and outputs and see if one of those are causing it , if it still does it with all audio inputs and outputs disconnected then there is a problem with the power amp

Posted on Oct 08, 2008

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- Sometimes you have to press the loud button on certain head units to engage the amplifier.


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