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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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1 Answer

Why does my inline fuses keep blowing on a jbl gto 14001 amp


You need to calculate the amount of amps being driven through that fuse + the amount you need to feed the amplifier.
In my Volvo S40 and V70 I had no problems driving an amplifier of the rear power connector, but on my Honda S2000 however I had to create a different connection all the way to the battery line for a smaller amp (connection as in cables, condensers/filters and fuses).

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JBL subwoofer not giving sounds even it is correctly connected


If this is a powered sub, than it will have it's own power supply and small mono amp, both of which can fail. Could be a fuse, but if the fuse blows again you will have a short on the main amp board.

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Fuse location for jbl sub amplifier


The sub amp obtains power through 30A fuse 15 in the power distribution box

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It will not power on


henrylshelt,
Your sub should turn on into standby mode when plugged into AC power without being attached to the receiver. If it does not follow the list below. If it does, the sub needs a signal from your receiver via either by line-level (RCA) or the speaker wires to turn on out of standby. Ensure that the cable or wires going to your sub is in fact sending a signal while the receiver is on. To Test, (speaker wires) hook up a different known working speaker; (line-level) Some receivers have a menu option to turn the LFE output on and off, ensure that it is on and producing a signal.

Diagnose the problem:
1) Remove all wiring to/from the unit except for the AC plug (use a different known working AC outlet), will it turn on? If so the other outlet is not working.
2) Remove the woofer, does the amp have a fuse that need to be changed? Change the fuse. If it blows again after replacing and turning back on, the speaker is blown; go to #4.
3) Unplug the woofer from the amp, does it turn on? If so, go to #4.
4) The sub need to be serviced. http://www.jbl.com/EN-US/Support/Pages/SupportOverView.aspx

-Hope this helps, Chris.

Aug 29, 2010 | JBL PSW-D112 Speaker

1 Answer

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.
Unhook the power fuse from the battery. Remove the ground, peel off the paint behind the bolt and scrape the copper off the back of the connector as well. You want metal to metal basically. Put back in the fuse.

Could also be incorrect wiring to the subs and amp.
Has the amp ever been hooked up before?

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2 Answers

JBL amp, worked fine untill 2 days ago. protection light on..


might have roasted your speakers voice coils a little which may be sending the amp into protect mode throw a speaker on it that you know works and if it doesnt trigger the protect circuit then you probably have a blown or almost sub.

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My amp was bad so i replaced it now my sub does not work i checked the wiring that goes from the amp to the speaker and everything seem to be ok then i put another speaker thinking it might be the sub and...


It doesn't sound like the wiring from amp to sub is your problem.

Is your amp getting a power light ?
Are you sure your remote wire is hooked up properly ?
Check both ends of your RCA cables

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1 Answer

Power not working


If it is fused check to see if the fuse is blown... Start with power and work you way down from there.
Power to the sub.
Signal to the sub
Cabling to sub
Check the speaker itself to see if it is good.

john




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1 Answer

BLOWN FUSE?


If no warranty - remove amp and check sub to another amp to isolate speaker from internal amp. Either the amp blew a channel or subwoofer blew. JBL's are typically well built. Has this speaker often been pushed loud often?

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Jbl gto 3501 amp


It's a mono amp. There's no bridging with this amp.

The two pairs of speaker terminals are connected together internally. The second set of terminals is for convenience.

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