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head lights dim almost off

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=85869
Printed Date: November 27, 2022 at 3:07 AM


Topic: head lights dim almost off

Posted By: jorgeben21
Subject: head lights dim almost off
Date Posted: November 19, 2006 at 12:50 PM

i have a yellow top battery at front a 15 farad aluma pro capicitor ihave a jl 1000/1 and a jl 13w7  and a garbage voice amp which i believe isnt pullin much current and my light look like they turn of when my bass hits its alful i have a crysler sebring



Replies:

Posted By: jorgeben21
Date Posted: November 19, 2006 at 12:51 PM
well they also told me that putting a batcap 400 should fix the but i said i have a 15 farad real world cap alumapro shuld i even have any dimming




Posted By: 1lowgalant
Date Posted: November 19, 2006 at 12:56 PM

a cap has nothing to do with your problem. you have a either a charging issue or the wiring from your alternator isn't working properly. IMO, your alternator just can't handle the demands of your system. all the caps in the world won't solve a charging system problem. upgrade the big 3 and see if that helps out. if not, you might want to look into a larger alternator. how many amps does your amplifier draw?

and 15 farads is a little overkill for a jl1000. 1 farad would be plenty if you wanted to use a cap.



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Whatever you do, DO NOT let the white smoke leak out of the wires.....




Posted By: mike12volt
Date Posted: November 19, 2006 at 3:50 PM
Upgrade to a Big Three. I use a cap. on mine, the lights dimm a little at idle speed, I only use 850w rms on 150 amp alt. I plan to upgrade to 200.




Posted By: 1lowgalant
Date Posted: November 19, 2006 at 4:58 PM
a cap can indeed help stabilize the voltage, but isn't a cure for the problem. simply upgrading the big 3 will help out alot.

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Whatever you do, DO NOT let the white smoke leak out of the wires.....




Posted By: aznboi3644
Date Posted: November 19, 2006 at 7:47 PM
A cap can stabilize the voltage...but it's still gonna drop...it'll just stabilize the voltage drop so its not a big dip but a little bit slower dip lol...but it won't fix anything




Posted By: DYohn
Date Posted: November 20, 2006 at 8:20 AM
You need a higher output alternator.  No other solution will fix the problem.

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Posted By: jvillefinest
Date Posted: November 20, 2006 at 9:09 AM

if i remember right the jl 1000/1 pulls 150 amps...



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2007 Acura TSX
SQ setup in the works




Posted By: djscustomz1
Date Posted: November 28, 2006 at 4:24 AM
1lowgalant wrote:

a cap has nothing to do with your problem. you have a either a charging issue or the wiring from your alternator isn't working properly. IMO, your alternator just can't handle the demands of your system. all the caps in the world won't solve a charging system problem. upgrade the big 3 and see if that helps out. if not, you might want to look into a larger alternator. how many amps does your amplifier draw?

and 15 farads is a little overkill for a jl1000. 1 farad would be plenty if you wanted to use a cap.


1000/1 1 farad???? Are you serious?  the 1000/1 first of all is lw rated and  about 1000rms.... that means pretty much 2000 true watts on that amp... and the rule of thumb is 1 farad for every 1000 watts... so lets see.... you are wrong for giving him any advice...

heres better advice... the money you spent on the cap should have been spent on buying another yellowtop in the trunk.... or better yet a kinetik battery... they are around te same price and has more amps and amp hours.... meaning more reserve for heavy hitting systems... 

I personally have 2 kinetik batteries.. an hc 2000 in the engine comp, and an hc 2400 in the back...



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I dont care about who has the bigger name in the business... The Bigger the name the Bigger the price. NO BETTER QUALITY!!!




Posted By: killer sonata
Date Posted: November 28, 2006 at 6:14 AM

DYohn] wrote:

ou need a higher output alternator.  No other solution will fix the problem.

what about adding a second alt? :)





Posted By: adrianspeeder
Date Posted: November 28, 2006 at 8:27 AM
killer sonata wrote:

DYohn] wrote:

ou need a higher output alternator. No other solution will fix the problem.

what about adding a second alt? :)




Easy to do on nice big trucks, but if this is a FWD car, kinda a tight fit.

Adrianspeeder

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'02 F250 PSD, '97 F-150, '71 F-100, '66 F-250, '93, '92, '88, '84 Broncos

Penn State electrical engineerin' major




Posted By: djscustomz1
Date Posted: November 29, 2006 at 1:41 AM
anything can be done..... like my old car I had was a pontiac sunfire and I had a double alt setup... a machine shop can work wonders you would be surprised... some times it is actually cheaper to go that route then a HO alternator...

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I dont care about who has the bigger name in the business... The Bigger the name the Bigger the price. NO BETTER QUALITY!!!




Posted By: advanced_audio
Date Posted: November 29, 2006 at 4:13 AM
Now correct me if im wrong but dosent the jl 1000/1 have a voltage regulator in it so how could u say its gonna pull 2000 watts dj? Also im hoping your not the same dj that got booted off here a while back with the 160 + db and a audipipe sub.




Posted By: master5
Date Posted: November 29, 2006 at 4:31 AM

A cap is not a cure for anything like this. Think about it..why do you think the cap is installed as close to the amp as possible?

It will not solve the problem of excessive current draw through the amps wire at peak demands..it will help "stabalize" it to the amp..at least in theory..or better put will make up for some of the volatge drop that is lost in the wire for a brief instant..either way the cap still needs the voltage back once its drained..where do you think that voltage comes from..it is not free..it still comes from the charging system when the vehicle is running.

This problem as stated previously is most likey poor wiring that is not up to the demands..and quite possibly a charging system issue as well. All the expensive yellow tops and caps in the world won't solve this.

Upgrade the "big three" and I bet that helps, that car is not known for its wiring. If that does not do enough your alternator/charging system is either defective..or not up to the demands.



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Posted By: advanced_audio
Date Posted: November 29, 2006 at 4:36 AM
I think Dyohn said it best "You need a higher output alternator. No other solution will fix the problem".




Posted By: master5
Date Posted: November 29, 2006 at 4:49 AM

agreed as well..but if the joke of a factory wiring that vehicle uses is not upgraded...nothing including an alternator swap will help considering the power demands of that amp.

The lights dimming to almost off is a sure sign of serious voltage drop..sounds to me like there is way too much resistance in the wiring due to it's whimpy size and probably corroded connections as well. And if the alternator/charging system has not crapped out by now due to that..it most likely will soon.



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Posted By: soultinter
Date Posted: November 29, 2006 at 7:20 PM
Master5 said it best, LISTEN




Posted By: master5
Date Posted: November 29, 2006 at 9:32 PM

And thank you for listening and agreeing soultinter.

To someone like myself that works on all kinds of cars and systems every day..this is common sense. First off the only complaint..at least at this point is the lights dimming...extremely dimming. He did not say the audio system was cutting off or that the car was not starting in the morning. He also states he has a good battery.

Now I am a absolutly an advocator of upgrading the alternator..but ONLY if really nessecary. Otherwise it is a waste of money. Now I can't say at this point with 100% certainty that the alternator needs to be upgraded. I would want the results of replacing the big 3 first.



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Posted By: 1lowgalant
Date Posted: November 30, 2006 at 11:48 AM
djscustomz1 wrote:

1lowgalant wrote:

a cap has nothing to do with your problem. you have a either a charging issue or the wiring from your alternator isn't working properly. IMO, your alternator just can't handle the demands of your system. all the caps in the world won't solve a charging system problem. upgrade the big 3 and see if that helps out. if not, you might want to look into a larger alternator. how many amps does your amplifier draw?

and 15 farads is a little overkill for a jl1000. 1 farad would be plenty if you wanted to use a cap.


1000/1 1 farad???? Are you serious?  the 1000/1 first of all is lw rated and  about 1000rms.... that means pretty much 2000 true watts on that amp... and the rule of thumb is 1 farad for every 1000 watts... so lets see.... you are wrong for giving him any advice...

heres better advice... the money you spent on the cap should have been spent on buying another yellowtop in the trunk.... or better yet a kinetik battery... they are around te same price and has more amps and amp hours.... meaning more reserve for heavy hitting systems... 

I personally have 2 kinetik batteries.. an hc 2000 in the engine comp, and an hc 2400 in the back...


what? 1000w rms = 1 farad. 2000 true watts? what? you do know the primary purpose of a battery is to start the vehicle, right? if you're not getting enough power from the alternator then it doesn't matter how many caps or batterys you have. as far as that goes, a battery isn't as good as a cap as in it takes longer for a battery to discharge than a cap so what does it do on those quick hard hits? i think you need to do some research before you advise people to waste money.

oh wait a minute, aren't you the stock boy that hit like a 1000db with an audiopipe 8" that's been in the car audio retail sales world for years and owns his own "custom" shop? yeah, that's what i thought. grow up man.



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Whatever you do, DO NOT let the white smoke leak out of the wires.....





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