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Subwoofer problems! Constant loud pulse, dashboard lights pulse?



Hi guys! Really need some help on this one! I installed a FLI active enclosure in to the clio over the last few days and can't get it to work properly:-/. RCAs are running down a separate side of the car to power and remote, it is grounded to where the rear lights ground on the right, when I turn the gain up even past a quarter all I get is very loud pulsing like a heartbeat, my interior lights also pulse with this and my rear wiper goes off? Wtf right? Can anyone help with this?? Also I am using a kenwood kdc-bt41u if that helps. Thanks in advance. Also no power errors on the unit.
 
  PH2 RS172
you used a scotch lock from your description... they are pants mate and im constantly redoing other peoples towbar electrics because of those cheapo nasties. connect a good earth loop and drill a hole and take back all the paint so you get a good solid earth and screw it down with a decent star washer. always use a seperate earth for amps. if your cabling is half decent then its got to be at least cabable of handling 15+amps which you cant piggyback off any earth cable anyway hence your problem of a feedback. :)
 
you used a scotch lock from your description... they are pants mate and im constantly redoing other peoples towbar electrics because of those cheapo nasties. connect a good earth loop and drill a hole and take back all the paint so you get a good solid earth and screw it down with a decent star washer. always use a seperate earth for amps. if your cabling is half decent then its got to be at least cabable of handling 15+amps which you cant piggyback off any earth cable anyway hence your problem of a feedback. :)

Okay thanks for all the information ill try that tomorrow! :) is the seatbelt holder a good earth point?
 
  PH2 RS172
i never earth off a non specific earth bolt already in place tbh but if you were to use the belt point make sure you remove the paint from the body side!
 
Thanks for the advice everyone, really appreciate it, subwoofers all sorted now, it was a grounding issue put a new terminal on the ground and grounded on its own to a bolt below the rear light and it's working a treat!
 
  Clio
Ground it somewere in ur boot I used a bolt in there and rub it down with sandpaper if it painted or it won't earth properly
 


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