I have a jl audio 250/1v2 when I plug in the power wire it comes on but then Shut off why is that

SOURCE: JL Audio 1000/1

Check the resistance between the positive and negative terminals of the speakers. There should be atleast 1 ohm of reistance depending on your set up... if there is very little there is a short in your wiring. If not remove the wires from the amp and now check the resistance between the termanls on the amp...there should be no condinuity...if there is your amp has short circited out.

SOURCE: Jl Audio 500/1 Car Audio

There are no fuses inside the amp.

Are any of the lights lighting up on the amp?

If so, which ones?

SOURCE: 10w6 jl audio subwoofers

I would say since your amp is a mono, wire the 3 subs in series in the box,, with only two leads going to the amp

SOURCE: my jl Auido 250/1 amp

You may have a bad output on the amplifier. I would recommend taking it to a local electronics repair to have fixed, or visit a local stereo shop - preferably a JL Audio dealer. Visit their website at www.jlaudio.com to find a dealer near you. You can have your amplifier sent in to JL Audio for repair by an authorized dealer and you'll get a warranty on the repair work.

SOURCE: JL Audio 500/1 Amp, The green power light is on but no sound!

Check to be sure you are on the correct outputs on the head unit, and be sure the outputs do not have a separate volume control.