I drive a 2007 chevy impala ltz and im having problems with my lights.?

LADYLOVE

New member
I kept the bose system in my car and I added 2 W 3 subs and a 500/1v2 Class D Monoblock Subwoofer Amplifier. I bought all new wiring and my stereo works fine but after about 6 months my lights started pulsating with the beat. Also, when i roll my windows up and down the lights dim. I didn't have any problems until I had the stereo changed so Im sure that is the problem but how do I fix it?
 
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