No sound coming from sub woofers amp is connected and powered properly,all connections are correct,i have checked all connections to head unit,to battery i have disconnected and re connected all connections,checked all wiring,all ok.It was working fine i came out to get in car next day turned on stereo all powered up fine except no sound from subwoofers.Any ideas would be great.thanks

if the wires are connected then you ether have a blown amp or sub. try hooking up a diff speaker to the wires if it works your sub is blown. if it doesnt your amp is blown

fusion h/u ca-cd500

Make sure you've run your ground wire properly and the connection to the battery is sound. Check that the wire ends are clean and rated for your amp and woofer. Make sure you have a ground wire running from the amp to something metal on the car so the system is well grounded. Check that your switch wire running to the head unit is tapped into the correct wire such that when that wire is active(I.e. Head unit powered on) the amp also turns on and relays the signal to your woofer. Buying a wiring kit is the easiest way to do all of this as most come with all necessary wires, color coded, with instructions if you still can't figure it out.

The remote wire from your head unit should be blue and there should be a wire that connects that to your amp. Make sure it is hooked up. Also, if you are using the high in put wiring up above, it shouldn't be mixed with your RCA. That wiring diagram is not needed for the subs. You should also check the gauge on you power wire that runs from the battery to the amp. If it is 4 or less it should be good if it is Copper Clad aluminum (CCA) it will put out power similar to 8 gauge copper wire. Most of the time the problem with the low output of subs is the amp wiring kit. You could have great subs and a great amp, but if the wire isn't any good it can sound like ****. Just FYI in case you weren't familiar with any of that. Always try to get pure copper wire when it comes to the power cable. You can google information about it. If you're wiring there is fine. Again, check the remote wires. Also check to see you have your amp levels turned up as well. As for the violet and violet/white. Those are referring to you speakers in your vehicle. Not your subs.

First of all get yourself a Y-LINK cable. (single male RCA on one side/ double female RCA on the other side) Connect the Y-LINK to your head unit sub woofer output with the stereo RCA that leads to the sub woofer amplifier. Now you are connected to the correct output. I do not know what head unit you had connected before to base your comparison, however there is a output voltage difference from one head unit to another, (1.2V, 2V, 2.5V, 4V, 5V) and that is what determines where the gain on the amplifier should be set to. Always match the headunit output voltage with the amplifier gain control to be the same. It is not uncommon for some entry level units to have a single sub woofer output. dreamsystems

That blue wire needs to be connected to both the receiver and the amp. It is what tells the amp to turn on when you turn the receiver on.

Hello eric_sodergu,

**First thing is verifying that the powerlight is lite up, this shows that it is receiving power and is grounded properly.

**Next thing you need to ensure is that the remote wire is connected properly on both the head unit and the amp.

**Third Make sure the RCA wires are all connected properly, try jiggling them around on the amps end to make sure there not just shorting out.

**Check all fuses related to the amp to make sure all the channels are working properly. (Applys to amps with multiple channels and fuses)

If all these things are fine, then the sub could very well be blown. Did you have it up loud before it stopped working ? You said it was working fine then just went all quiet, did the head unit power down as well ?

Post back with any further info or questions so that I can assist you further.

I would double-check your RCA's on the amplifier. You should hear a thud if you unplug them. If not they are either not hooked up or defective.

make sure your speakers are connected correctly if subs and are inside the box then check connections also at times the rca at the back of the head unit can disconnect. if power light is on then error is either speakers not connected correctly, rca faulty or not connected or speaker output on amp is blown

You need to go into the setup menu and find out if the radio has a sub low-pass filter that redirects the bass to the pre-out for the subs, and away from the main speakers. Fiddle in the audio menu.