Question about Pioneer Gm-d8400m 1200w Max, Class D Mono Amp Gmd8400m

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I have a pioneer gm-d8400m and the amp has a blue light that pulses on and off and the subs "**** in" like every 5 seconds... no sound the amp was working for about a week before .. is it blown? if so, how can it be fixed?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 119 Answers

SOURCE: Amp is on, Subwoofer works, but no sound.

here is a short test you can try, remove the rca audio cable from the amp & connect a diskman or toher audio o/p device that you can hook up with the same rca wires, turn on the amp & see if you have sound. you can also remove the speaker wires from the sub & using multi meter read the ohm's of the sub, most subs are 4 ohm. Hope this help locate your problem

Posted on Nov 04, 2006

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  • 10 Answers

SOURCE: Amp just abruptly stopped working (Pioneer GM-5300T)

Apart from the external DC power fuse (I hope you have one in-line), the majority of in-car amps have 2 mini fuses inside the unit to protect the output MOSFETs from overloading due to incorrect speaker connections, ie, if the output impedence is rated at 4ohms, anything less than that is considered to be a short circuit, and will overload the MOSFETs. After performing the tests suggested by KaeZoo, open the unit and look for printed markings on the circuit board, something like F1, F2, the fuses may not look like conventional fuses.

Posted on Jun 12, 2007

SOURCE: Pioneer GM-7300M 800 Watt amp will not power on

chenge the fairroll,and reset your sistem go

Posted on Aug 24, 2007

AUTOSOUNDINS
  • 232 Answers

SOURCE: sub woofers dont give clear sound on high volume

THE AMPS PERFORMCE IS DIRECTLY RELATED TO THE STATE OF THE BATTERY AND THE CONNECTION FROM THE AMP TO THE BATTERY, CONNECT THE AMP DIRECTLY TO THE BATTERY TO SEE IF THE SAME PROBLEM EXIST OUTSIDE THE CAR

Posted on Aug 28, 2008

Arius
  • 446 Answers

SOURCE: blown fuses

there is a possibility that the current load is excessive nor there is a short circuit from elsewhere, do not try to install again a new fuse unless you are certain there is no shortages of any wire from inside the amp and throughout the system by physical inspection

also install the right value for your fuse meaning the right amp and voltage, high temp is an indicator of shortages and defective power transistor

Posted on Oct 06, 2008

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1 Answer

Here's another pic. On my pioneer GM-D8400M amplifier. Again light flashes on and off wether or not subs hooked up. Can it be fixed ?


Short circuit detected. Check and replace the damaged component/s at its audio output stage circuit. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/

Nov 20, 2016 | Pioneer Car Audio & Video

1 Answer

Power light flashing


This means it is blown. Whenever the power light flashes on any amp it is blown or something else is wrong with it. Most likely its blown. You can blow am amp by hooking it up to a powerful sub and blaring it, or just overheating it. Hope this helps. This can usually be fixed as well

May 07, 2013 | Pioneer Gm-d8400m 1200w Max, Class D Mono...

2 Answers

So my gm-5400t has a blue light flashing on and off constantly and my sub a dual voice coil pioneer 12inch cuts in and out with it. Any ideas would be appreciated its driving me crazy.


The most likely culprit is that your amp has a bad power connection. If the blue light (protection mode indicator) is blinking, it is probably because the ground is not connected properly. Make sure it is solidly connected to the vehicle chassis in a paint-free location. If it is, then check the live power wire. It should have a solid connection to the car battery. If that is also well connected, then the amp is probably overheating. You will then need to make sure it is in a well ventilated area and ensure that it is not getting too hot during operation. It is possible that it has been damaged by overheating already.

Mar 03, 2011 | Pioneer GM5400T 2-Channel Bridgeable...

1 Answer

How do you rest a pioneer GM-D8400M amp


just diconnect power to it for a few seconds.

Nov 15, 2010 | Pioneer DEH-P6800MP CD Player

1 Answer

Ihave a gm-d84004m 1200 watt amp whatsize amp wires should i use


if you are talking about the power and groung use atleast 4 gauge for the subs i usually use 10-12 gauge

Jul 10, 2010 | Pioneer Gm-d8400m 1200w Max, Class D Mono...

2 Answers

I have a pioneer gm-d8400m the amp isnt working


flashing light could mean a few different things. 1- constant power may not be there. check with a test light or multimeter. should read around 12 volts. it would be a good idea to check all the power and ground leads. make sure u have a good ground. 2- bad sub. im assuming sub since its a monoblock amp. you can meter the subs. make sure the total ohm load is no less than 2 ohms. any lower the amp will go into protect mode. 3- bad amp. power supply may be bad. the newer pioneer amps are full of protection circuits. ive been a professional installer for a shop about 8 years and we sell pioneer. hope it helps.

Dec 25, 2009 | Car Audio & Video

1 Answer

NO REMOTE TERMINAL ON PIONEER GM1200 AMP


does it function properly with just the power and the ground?If so try using a ordinary fuse breaker(switchable on/off) and mount it in the cabin of the vehicle where you have easy access to it and can shut it off and turn it on when you need to- Its not necessary to have the remote lead connected to it if it functions well without it.

May 29, 2009 | Pioneer Gm-d8400m 1200w Max, Class D Mono...

1 Answer

Basicly my speakers were working fine, my subs were working fine but everytime i was turning my volume up to a certain level i would lose all base and all noise from the subs in my boot, so i turned it...


The amp should always light up showing you that it is powered and there will also be a red light that will light up if theres something wrong.Sounds like maybe the hot wire that goes to the amp isnt big enough to give the amp enough power.Check your positive wire and ground wire for tightness and make sure hot wire supply is big enough and also the ground wire is big enough and has a good ground.I hope this Helps you.Have A great day..

Mar 31, 2009 | Pioneer GM-X722 Car Audio Amplifier

2 Answers

Amp pulses


make sure our ground is good thanks pierre

Jul 17, 2008 | Pioneer GM-5100T Car Audio Amplifier

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