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Hi, I'm having issues with a new system i just installed in my step-dad's 2000 Nissan Xterra se. At first when i plugged in the pioneer head unit it wouldn't turn on, but i found out the antanna jack had to be plugged in for it to turn on. I've installed a few systems now and i never had to do that before, thought that was kinda weird. The front and rear speakers sound great and work fine. But then when i hooked up the amp i had another problem. The two 8 inch Pioneer subs wud only play a slight thump every now and then. I've checked out all the wiring to the amps and subs and i'm stumped. I'm wondering if it has something to do with my first problem but not sure. I just recently had these subs and amp hooked up in my car which i also installed myself and they sounded great, so i'm at a loss at what to do now. Thank you for taking the time to help -Ryan

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  • Ryan Armour May 21, 2011

    The subs and the amp are fine. They're brand new and worked exceptionally well in my car that i just recently took them out of.

  • Ryan Armour May 21, 2011

    Could it have anything to do with the head unit and the antanna jack giving it power? or i was thinking maybe the amp isnt getting enough power.. nut the light on the amp is blue so it has power, so i dont know..

  • Ryan Armour May 22, 2011

    I would rather not take out the amp and subs and hook em up to an external power because i know for a fact these both work just fine, and i spent like 5 hours running all the wires thru the firewall and under rugs. I bought them brand new about a month ago and had em in my car for a few weeks with no problems in fact they sounded awesome. The problem has to be in the Nissan because i did everything exactly the same as i did when i hooked them up in my car. I've hooked up a few systems now including my $3,000 sound system in my car and i've never had to plug in the antanna jack to the head unit for it to turn on, that's why i was wondering if that's where the problem might be. As soon as I unplug the antanna jack the head unit shuts off and my amp turns off. When the music is playing all the door speakers sound great and the subs only give a little thump or pop every once in awhile. Thank you for the help. I dont wanna have to take this to a car audio shop that will charge hundreds of dollars to solve a problem that might be super simple.

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  • When you hooked this stereo up did you use the stock wires from the stock radio? Just FYI I never do this as it can starve the more powerful aftermarkets and often the harness is spidered in so that if not all wires are hooked up the unit will not properly function.
  • It sounds to me like that antenna is common grounding that deck and when you unplug it the deck powers down and so to does the amp with no remote power source.
  • If you are using the old wires that fed the stock radio I suggest you get in that dash and find the proper wires of a little thicker gauge and see if that helps. In the least check the ground wire being used for your deck. I think this could be a major offender. Make sure it is tightly secured. In fact, pull a bolt up a bit from the floorboard and run a wire from there to the ground wire for the deck and remove the old ground wire and see if the deck bumps for you. That's just a quick test but you still want to use all new wires from inside the dash. A loose or poor ground wire would do just what you are saying especially given the fact the antenna makes it run, even if poorly, when plugged in.
  • Make sure non of them wires got pinched or the insulation negotiated when being ran.

Regards, Tony

Posted on May 24, 2011

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Connect both the subs to any other external power source and any other music system and check.If they work properly or gives same problem.If they works properly, then problem is wiring or the AMP.The amp is of low voltage or it got weak or its shorting.But if problem is same then subs are weak and shorting.----- this testing will help.Thanks.Helpmech.

Posted on May 21, 2011

  • raj somaiya May 22, 2011

    Yes it can be possible the amp is not getting enough power to make the subs work.Amp is getting power, that is agreed, but its not getting enough power that can be possible.Yes head can be the issue as it gets power from head unit, but antenna jack its for frequency related.Its required to get proper frequency.But if possible get connected antenna jack and check.On some car models, its that way.If no antenna jack is connected then unit will not complete its circuit and will not function.------------- There is bit troubleshooting that has to be done.To confirm the fault.Give external power to subs and amp externally and then check if problem is same, then try with antenna jack.--------- This should help.Thanks.Helpmech.

  • raj somaiya May 22, 2011

    Yes if all wires checked out ok, subs and amp new then its quite possible that there is issue with Nissan.The products are not getting enough voltage to function.May be any of the grounding wire is getting short or getting disconnect and connect or its getting in contact with any other metal part.----
    Thanks.helpmech.

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You must have the installation manuals for both units to connect properly or the outputs can be blown out which maybe you case. The slight thump from your speakers makes this outcome from shorted out outputs from the amplifier

Posted on May 21, 2011

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