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My alt is a 140amp,I had it upgraded, shouldn't that be enuff for the 600 watts my system is? My lights dim, and volt drops. Would a new batt help this out? The big 3? I just think I wasted money on a bigger alt cuz my lights dim and what not.

High Society wrote:My alt is a 140amp,I had it upgraded, shouldn't that be enuff for the 600 watts my system is? My lights dim, and volt drops. Would a new batt help this out? The big 3? I just think I wasted money on a bigger alt cuz my lights dim and what not.

if you haven't upgraded your wiring that is most likely why. The h.o. alt is useless if the power cant get anywhere, eh?

could be a bad connection somewhere, could need larger wiring for the 'big 3' or it could be that your car's battery is damaged and going dead. that'd cause the same problem too.

I would upgrade the wiring

Upgrade the wiring and go from there. If that still doesnt seem to fix it I would look into running an extra batt to keep voltage up. Really, your alt shoudl be plenty sufficient to run that kind of power with the upgraded wiring.

have the battery checked under load. that'd be my first bet

Well upgraded to 4g, helped a lil, but not much. Time for a new batt? I havn't checked to see if my lights are still dimming, but I will when it's dark :) I really wanna get this fixed.

Before you go out and buy a new battery, take it to a car repair shop and have them load test the battery. That way you dont waste time just throwing parts at the car to attempt to rectify the problem

TEDD

if one of the cells of the battery is damaged, it'll show up under load.. which was why I said to get it checked.
any car parts place should do it for free

I just went to auto zone on my way home and they said they would do it, so i'll go up there some time. The batt does look pretty old tho.