Lights dimming after I installed subwoofer and amp in 2007 Hyundai Sonata 3.3L V6


Asked by Nov 24, 2014 at 02:01 AM about the 2007 Hyundai Sonata GLS FWD

Question type: General

First off, I upgraded my wiring with 4/0 welding cable as so; engine block to battery
neg terminal, battery neg terminal to frame, battery neg terminal to strut tower driver
side, strut tower passenger side to engine block, alternator positive to battery terminal
pos. I installed 0awg power wire (with fuse) to a 1000 watt RMS amp
( and have it grounded to
the frame (easily made via fuel sender access panel behind seats). I have the amp's
gain sensitivity set to 47.4 volts and am running a singIe sub
( My alternator is
stock 130amp, which i have been told by many people involved in high end car audio,
should be able to handle the load of this amp, yet my lights are dimming when I have
volume high and the subs hit. My battery was tested and it's at 700amps. Is my
alternator failing perhaps? Do I need a bigger battery? A secondary agw deep cycle
battery wired in parallel? A higher output Alternator? plz help and thanks in advance.

1 Answer


Update and upgrade your alternator. It seems like you did everything else right.

Your Answer

Hyundai Sonata Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Hyundai Elantra
397 Great Deals out of 45,626 listings starting at $495
Used Honda Accord
540 Great Deals out of 94,361 listings starting at $1,300
Used Toyota Camry
807 Great Deals out of 71,840 listings starting at $175
Used Kia Optima
359 Great Deals out of 29,302 listings starting at $1,950
Used Nissan Altima
751 Great Deals out of 67,419 listings starting at $750
Used Honda Civic
347 Great Deals out of 52,617 listings starting at $1,200
Used Ford Fusion
639 Great Deals out of 60,147 listings starting at $2,300
Used Chevrolet Malibu
608 Great Deals out of 48,695 listings starting at $1,800
Used Toyota Corolla
643 Great Deals out of 66,330 listings starting at $1,449
Used Hyundai Santa Fe
187 Great Deals out of 16,259 listings starting at $1,900
Used Nissan Maxima
231 Great Deals out of 17,870 listings starting at $1,995
Used Mazda MAZDA6
157 Great Deals out of 9,855 listings starting at $1,200

Used Cars For Sale

2014 Hyundai Sonata GLS FWD For Sale
27 Great Deals out of 1,033 listings starting at $6,991

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.