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I have checked all connections to my amp battery,head unit,remote or trigger wire,fuses,power cable,rca leads,ground wire,amp has a green led light on it indicating if it works ok,red if it`s not,light shines green telling me it`s ok.Ihave hooked up another speaker to amp to test and see if subby has blown,it has not,i have changed rca leads in the back of the head unit from rear to front.I still have no sound coming from amp to sub woofer,Have i blown the channels in my amp i am wondering ?

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Hello scottsmad1,

You do not specify the make and model of your amp, so it is not possible to point you to specific troubleshooting information. However, some problems are generic and it appears that you have already isolated the problem to the amp itself.

It's still possible that the head unit does not provide a strong enough input signal, but your amp should have a level control that allows you to match it to the head unit. I'd also doublecheck the other amp settings. If the setting check out, it's likely that the amp is defective.

Hope this helps.

Posted on Jul 11, 2009

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Posted on Jan 02, 2017

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How do I wire external amplifier


In order for this to work correctly you need:
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  4. RCA connection from head unit to the amp. (sound in)
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It is easiest to start with deciding on the amp mounting location, and then running all the wires. Add an extra foot or so to each wire. You may discover in the process that you have to move things around due to unforeseen obstacles. This extra foot will help in that case. Always attach the ground wire to the chassis first and then to the amp first. Once you have the fused power wire from the battery installed; remove the fuse before trying to attach it to the amp. ONLY re-install the fuse once all connections to the amp are made, secure, have been checked twice and you're ready to test it.. This includes speakers. DO NOT for ANY reason have the amp powered up before attaching ALL speaker connections.

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Connected a Dual XPA2100 300 watt amp to the battery and connected ground to chassis of vehicle. Vehicle is 2004 Saturn Ion with battery located in trunk area. Amp does not power on, all connections are...


The remote wire DOES need to be connected to the head unit. You can see if thats the problem simply by touching the remote wire to the power wire. The unit should come on. The head unit should either have a remote lead, or a power antenna lead, and thats what you need to turn the amp on and off. BE SURE your ground is solid, and its usually best to take that to the battery as well to prevent unwanted engine noise. Hope this helps!

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Here's how it goes:
Speaker wires:
grey=right front pos.
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green=left rear pos.
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red lead:
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2 Answers

I have checked all connections to my amp battery,head unit,remote or trigger wire,fuses,power cable,rca leads,ground wire,amp has a green led light on it indicating if it works ok,red if it`s not,light...


Your amp could be in protection mode! Sometimes turning up to high or wires touching will put in protection mode! It will have to be unplugged for a day or two to drain all power out of the memory. Leave accessorie/ignition wire hooked up, just not power and ground wiring. It should reset itself.

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Check in this order:
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Xplod to a jvc


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1 Answer

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Hi,

Other than the +12V, the ground (-) and the 2 RCA inputs, normally external amps have also a remote trigger which switches it to active on. The remote trigger is activated by a wire from the head unit. Colors would either be yellow or blue but depends on manufacturer of head unit. Alternately, you can connect a simple toggle on/off switch to activate the external amp.

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Good luck and kind regards.

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