Subwoofer pushing out problem

try taking out the capacitor and wire the amp up with out it. it sounds like the cap is back feeding or discharging voltage when it should not be . if you reinstall the amp with out the cap and noise goes away buy a new cap or do away with it .

C515 ON THE MAIN POWER PCB (HAS 223 K 630HI PRINTED ON IT) HAS FAILED
Replace with a 22nf capacitor - Maplin part number N38CN
the new maplin part has a higher voltage rating and is bigger. it will need to be fitted with the leads extended with wire to get it to fit.

Possibly the voltage spike/surge destroyed your subs. I am surprised you didn't lose your amp as well.

When speakers are wired in the wrong way the will do the "pushing out" you're describing. Basically the polarities have been reversed and if kept like this over a period of time will blow the speaker. Best thing to do is to disconnect the power by the negative on the amp and take out the fuse from the power supply. Check the wires running from the amp to the subs, negative to negative and positive to positive. I know it sounds basic but many people do mix it up! I would also check to see what channels the subs have been wired into?

Best way is to have one sub from channel 1 and the other sub from channel 2 for example. Or if its a bridged 4 channel amp, have 1 sub running from channel 1&2, and the second sub running from channel 3&4 still making sure of the polarities. Again this all depending what kind of amp and sub you have.

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For example;
A 4 channel (bridged) 1000W amp. 250W max per channel or 500W per 2 channels! So if you have 2 500W subs, by connecting one to a single channel will decrease subs ability due to the lack of power supplied. However by combining 2 channels you optimize the output!
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Once you know all your wiring from your amp to subs are ok/good connections/good wires etc you shouldnt have to "wiggle the wires" to get it to work as this is just a bad connection. Also ensure that no 2 wires are touching. Make sure that the master volume on the amp is turned down. You dont need this to be on loud at all, in fact far from it or you'll risk damaging both the amp and subs!

Hope this helps!

either smell your amp and see if it could have blown or the place that installed your deck didnt hook up your rca jacks

how many amp watts r u pushing them with

take a look at the amp is there a light on with the car running and stereo on? if no check the big black ground wire that connects to bare metal somewhere near the amp , also check the big red wire for 12 volts and the small wire for 12 volts let me know -jeff

Wire them up this way and see what happens. Bridge your amps output.

Amp+ to Sub1+
Sub1- to sub2+
Sub2- to Amp -

is it a seald box or a ported box?

Check the main amp fuse under the hood, even if it looks good just change it. Often times that light on the amp can come on just from the power amp tunon wire. Try a friends subwoofer box just to make sure the connectors on your box are good, and if that doesn't work then give me some more details....year/make/model of car, what kind of sub, what types of things do you see on the side of the amp....is there a green light as well as a red light?