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Power is not going to my sub

My jbl gto4060 amp int the back of my car seems to have just stoped working there is power going in to the fuses but thats just about it no sound from the sub what so ever

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  • mundy1992 Apr 24, 2009

    i have checked the 12v but not the signal thanks i will check that and get back to you

  • mundy1992 Apr 25, 2009

    its working now you were right the fuse on the singal wire had gone i have now replaced it and it is working fine thanks for the advice it realy helped :)

  • Starfish Phoenix May 11, 2010

    Are there any lights on your sub driver? (Amp) ... What sub/amp are you using?



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( I am assuming your amp does not turn on)

You will need a test light. You can get one at a hardware store for a dollar or two. clip the end of the test light lead to a good ground, and touch the needle to the red 12v constant that feeds the amp. If it lights up then you are getting power from the battery. Next, turn the car and the stereo on and touch the needle end of the light to the small blue signal wire that goes into the amp. This should light up as well. If either of these don't light up then the wiring is faulty. If they both light up then we need to test a bit more.

First make sure your ground wire is tight at both the amp and the car body. It should have metal to metal contact with the car (no paint on the contact area)

Posted on Apr 24, 2009


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It will not power on

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I have an JBL GTS 180 Amplifier for my truck. The power light is blinking and there is no sound. Can you help me?

I believe you have a weak ground signal. Check the ground location.
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Could also be incorrect wiring to the subs and amp.
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