Lights dimming

faithandfame · Jan 26th, 2003, 05:13 PM

My system is pretty loud but I don't think it really pushes that hard. About 2 months after installing my system I had to replace my battery. My lights dim really bad when the bass hits. Also even if I have my stereo off and I turn on the heat or a/c my lights dim a little bit. Someone told me to get a capacitor and that would fix it. Someone else told me that I had to get a better alternator. What should I do?

Psch91 · Jan 26th, 2003, 05:40 PM

If you turn your ac on and your lights dim, thats a bad sign. I think you may need a new alternator, but dont take my word on it.

**Slurppie** · Jan 26th, 2003, 06:11 PM

I agree with Psch91. Your altenator is designed to handle loads that your stock system throws at it. Adding a capacitor will only make things worse due to the fact that its another device that the altenator has to charge. Its time to have your altenator/battery checked out.

Honest Bob · Jan 26th, 2003, 08:45 PM

Sounds like you got too small of a battery. Could also be your alt though.

faithandfame · Jan 26th, 2003, 09:04 PM

Does anyone know if the Optima D750U yellow top battery would fit in my 98 200sx?

McLaren F1 2003 · Jan 26th, 2003, 10:15 PM

Quote:

Originally posted by faithandfame
Does anyone know if the Optima D750U yellow top battery would fit in my 98 200sx?

correct me if im wrong, but it should fit with no problems

mirrortints · Jan 28th, 2003, 10:54 AM

I would like to know if you mean to use the yellow top as a starting battery? Cause they are mainly for just stereos. You would need a red top for a starting battery.

Make sure you add some wires under the hood for the batt to ground, alt to battery, and engine to ground. That, along with the red top should help a lot.

BTW, a cap works for your stereo, if ur gettin dimming with the stereo off, that would mean it wouldn't do sh*t for u.

sno · Jan 28th, 2003, 01:26 PM

i burnt out the altinator in my car cuz of my stereo, it just wasn't strong enough. but now i have a bosche altinator and a optima red top, the lights don't dim anymore.

McLaren F1 2003 · Jan 28th, 2003, 02:20 PM

Quote:

Originally posted by sno
i burnt out the altinator in my car cuz of my stereo, it just wasn't strong enough. but now i have a bosche altinator and a optima red top, the lights don't dim anymore.

how many amps is that alternator?

sno · Jan 30th, 2003, 03:13 PM

i think it's a 70amp but i'll have to check for sure.
the part number is AL2354X

01LTD · Jan 30th, 2003, 03:29 PM

I'm thinking mine in my old 200SX-SE was either a 70 or 80 am alternator. On the red top fitting, it will, but you will need to lengthen the wires since the positive and negative posts are crossed on the red top from the factory battery.

McLaren F1 2003 · Jan 30th, 2003, 05:08 PM

whats the stock amp rating?

CLocK NX · Jan 30th, 2003, 08:24 PM

I would get a new battery and buy a find a cheap capacitator... that should fix it, i wouldnt think it was your alt. because when you use the 2 different fuses hense your lights and ac it runs throguh the alt but isnt sending enough power somewhere right... so the alt by chance may be bad but chances are it is the battery

sno · Feb 5th, 2003, 02:15 AM

all a capacitator does is store energy and release energy REALLY quick, kind of like how RAM is faster then a hard drive... but anyways, if you don't have a good altinator/battery combination then having a cap won't do you any good.

BIGBALLER · Feb 5th, 2003, 01:07 PM

SOUNDS LIKE YOU NEED TO REGROUND YOUR ALTENATOR OR JUST REGROUND THE HOLE CAR. THATS THE ONLY WAY IT WILL STOP DIMMING!!!!!!!1