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Headlight dimming! pictures up and problem solved 19/2/2011 

 

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 Post subject: Headlight dimming! pictures up and problem solved 19/2/2011
Posted: Fri Jan 14, 2011 11:43 pm 
Getting Side Ways
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Hi guys need some help here,

I have a problem with my headlights dimming here is what i am running....

500Wrms response Precision amplifier (500Wrms @ 4 ohms)
Running my MB Quart 350Wrms sub
I have 4g wire from the batt to a splitter into two 8g only running 1 amp atm

front speakers are standard running off a JVC headunit

I am also having trouble tuning the sub amp because i can't turn up the headunit all the way.

Here is how it is setup.

And here is a video of the voltages

Cheers for any help guys! :wink:

Last edited by Falcon_92_EB on Wed Jul 08, 2015 10:56 pm, edited 3 times in total.

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 Post subject: Re: Headlight dimming!
Posted: Sat Jan 15, 2011 12:32 am 
Fordmods Junkie
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lukas_bartko wrote:
Hi guys need some help here,

I have a problem with my headlights dimming here is what i am running....

500Wrms response Precision amplifier (500Wrms @ 4 ohms)
Running my MB Quart 350Wrms sub
I have 4g wire from the batt to a splitter into two 8g only running 1 amp atm

front speakers are standard running off a JVC headunit

I am also having trouble tuning the sub amp because i can't turn up the headunit all the way.

Here is how it is setup.
Image

And here is a video of the voltages
http://www.youtube.com/watch?v=NqpmRnZzvwg

Cheers for any help guys! :wink:


Check your earth wires and cables...especially at your engine block. This can be a cause due to light dimming.

I'm running an 800WRMS monoblock and 400WRMS 4 channel amp, at full volume, about 3/4 gain and I get no light dimmings. I cleaned all the main earth cables making sure they are grounded properly to chassis and block. Also negative terminal needs to be nice and clean. My power only reads 13.5volts while engine running (I think alternator is screwed a little), with system on full volume, I could see as much as 1V drop at every bass kick.

So your video doesn't seem much of a voltage drop IMO...but I ain't much of an expert when it comes to voltage drops.

 

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 Post subject: Re: Headlight dimming!
Posted: Sat Jan 15, 2011 4:28 pm 
Getting Side Ways
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cool thanks phongus! ill check em today.
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 Post subject: Re: Headlight dimming!
Posted: Sat Jan 15, 2011 4:41 pm 
Getting Side Ways
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your stereo is too hectic bruz.

nah but seriously. as stated check earths, is your battery and alternator healthy?

 

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 Post subject: Re: Headlight dimming!
Posted: Sat Jan 15, 2011 7:41 pm 
Getting Side Ways
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With my old sterio I had a lot of voltage drop and headlight dimming.
The problem was the battery. It was old and too small for running a large system.
What size and how old is your battery?
After I replaced my battery with a new decent brand I had no problems with voltage drop becides the usual 1v drop on a 40hrz sweep.

Was running 800wrms mono and 400wrms 4 channel.

Also if you are only running 1 amp run the 4 gauge straight into the amp.

And read a few amp tuning tutorials. You don't need the headunit to turn all the way up to tune it....
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 Post subject: Re: Headlight dimming!
Posted: Tue Jan 18, 2011 10:57 pm 
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IMO i think you need a capacitor.

A capicitor will hold an immense amount of energy and act as a buffer between your battery and the amp. When the amp requires a large burst of energy instead of hitting the battery and your whole electrical system it draws that energy from the capacitor. I put one in mine and my lights barely dim anymore at full volume. Jaycar and altronics do them and most car stereo shops i guess.

 

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 Post subject: Re: Headlight dimming!
Posted: Tue Jan 18, 2011 11:22 pm 
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Fairmont_03_5.4 wrote:
IMO i think you need a capacitor.

A capicitor will hold an immense amount of energy and act as a buffer between your battery and the amp. When the amp requires a large burst of energy instead of hitting the battery and your whole electrical system it draws that energy from the capacitor. I put one in mine and my lights barely dim anymore at full volume. Jaycar and altronics do them and most car stereo shops i guess.


It can be fixed with just the capacitor, but in the end the car is still running with a possible bad earth some where which affects the whole car...not just the sound system.

 

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 Post subject: Re: Headlight dimming!
Posted: Tue Jan 18, 2011 11:57 pm 
Getting Side Ways
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I had the same problem with the capacitor there (didnt you watch the video?)

Watch my build thread over the next couple of days i will update it on what i am doing to combat the voltage drops.
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 Post subject: Re: Headlight dimming!
Posted: Wed Jan 19, 2011 10:52 am 
Getting Side Ways
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Here we go with the capacitor debate again :lol:

There are two schools of thought.

1: They are a bandaid for ground/cabling problems.
2: They are teh best. Plus, they look sick in the boot bro!

IMO They really aren't needed.
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 Post subject: Re: Headlight dimming!
Posted: Wed Jan 19, 2011 1:09 pm 
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SLO247 wrote:
Here we go with the capacitor debate again :lol:

There are two schools of thought.

1: They are a bandaid for ground/cabling problems.
2: They are teh best. Plus, they look sick in the boot bro!

IMO They really aren't needed.


I agree. In your case, I think that it is #1.

I am running a bit more than you in my EL. There is
* 2 x 125wrms (4 ohm) to the front splits
* 750wrms (2ohm) to the sub
*factory premo amp to the parcel shelf

I have 0g power cables (only to the distribution block), 4g and 8g power/earth to the amps.
2x4g earths from the battery to the body.

While I have an Optima Yellow top (D34), I only have an underdriven 85A alternator (as I am running an EB motor/ancillaries). No capacitor and I have no issues with dimming.

 

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 Post subject: Re: Headlight dimming!
Posted: Wed Jan 19, 2011 1:16 pm 
Getting Side Ways
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Well it is clear i need more earthing cable and battery.

Last edited by Falcon_92_EB on Wed Jul 08, 2015 10:55 pm, edited 1 time in total.

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 Post subject: Re: Headlight dimming!
Posted: Wed Jan 19, 2011 5:01 pm 
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lukas_bartko wrote:
I had the same problem with the capacitor there (didnt you watch the video?)


Wooops, usually i make sure i read all the text so i dont make an idiot of myself but i went right past the video :oops: . Forget my Post!! :|

 

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 Post subject: Re: Headlight dimming!
Posted: Wed Jan 19, 2011 5:18 pm 
Getting Side Ways
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lukas_bartko wrote:
Well it is clear i need MOAR earthing and battery.


not having a go at you but its spelt "more" also hit your earths with emery paper too, shiney metal conducts the best.

 

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 Post subject: Re: Headlight dimming!
Posted: Wed Jan 19, 2011 5:45 pm 
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DormanAU wrote:
lukas_bartko wrote:
Well it is clear i need MOAR earthing and battery.


not having a go at you but its spelt "more" also hit your earths with emery paper too, shiney metal conducts the best.


I dunno if that was a joke or youve missed out on much of the interwebs lol.

 

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 Post subject: Re: Headlight dimming!
Posted: Wed Jan 19, 2011 6:24 pm 
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krisisdog wrote:
DormanAU wrote:
lukas_bartko wrote:
Well it is clear i need MOAR earthing and battery.


not having a go at you but its spelt "more" also hit your earths with emery paper too, shiney metal conducts the best.


I dunno if that was a joke or youve missed out on much of the interwebs lol.

LOL on the mea forums they use Moar as a funny way of saying "more"

I know what a good earth is i just need more earthing points with thicker cable.
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