Cap did not stop lights from demming
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=40981
Printed Date: July 26, 2025 at 3:29 AM
Topic: Cap did not stop lights from demming
Posted By: canuheminow
Subject: Cap did not stop lights from demming
Date Posted: October 15, 2004 at 10:31 PM
I have a 1.5 cap connected between my battery and my rock 8004, but my light are still demming as before I hooked up the cap. I'm running a kenwood 7015 with a OZ Audio Matrix 12" sub. I thought the cap was suppose to help or do I need to move up to a bigger cap? Plus does it make a difference in who the cap is made by? Please help, Canuhemi ------------- CanUHemi
Replies:
Posted By: canuheminow
Date Posted: October 15, 2004 at 10:32 PM
I meant a 1/2 farad cap ------------- CanUHemi
Posted By: Rushman
Date Posted: October 15, 2004 at 10:46 PM
did you happen to charge the cap before you installed it? They are usually shipped dead. 1/2 farad isnt much these days. If its fully charged , you might concider moving to a 1 farad cap.
-------------
99 F-one fitty
Pioneer Premier H/U
Alpine EQ
Kicker 1200 amp
4 Kicker comp 10s
6 kicker SS65.2 components
Posted By: speedwayaudio1
Date Posted: October 15, 2004 at 11:00 PM
a cap is not your trouble. the alt is. you need some more power. a high output alt will give you the power you need. what is the rms power output of the amp? 150 amp alt would be the ticket. u can still use the cap, but a cap will never cure this problem. a cap stores power it does not generate it. does a search for caps and alts on this forum and u will find tons of info on the subject. get the ho alt you be glade you did.
-------------
Big Dave
Posted By: canuheminow
Date Posted: October 16, 2004 at 12:23 AM
I have a 2005 chrysler 300c that comes with a 160 amp alt. I need something bigger than that. I found the site for HO
-------------
CanUHemi
Posted By: canuheminow
Date Posted: October 16, 2004 at 12:27 AM
I have a 2005 chrysler 300c that comes with a 160 amp alt. I need something bigger than that? I found the site for HO Alts, but no prices. Should I go with a 190 amp or a 200. How about if I used one of HO Power Caps would that make a difference? Don't even know if one of the HO alts will even fit my car, I need a fix and I need it fast, I have my lights demming, can't even turn up my system!
-------------
CanUHemi
Posted By: Steven Kephart
Date Posted: October 16, 2004 at 1:58 AM
My guess is that you have a bad ground. Try removing your ground and sanding away all the paint and other stuff to shiny bare metal. If you are using an already existing bolt (seat belt bolt etc.) then make sure it is not corroded or painted either to be sure of a very solid contact. Steven Kephart Adire Audio -------------
Posted By: fatgotti
Date Posted: October 16, 2004 at 8:03 AM
Also what size power wire are you using and is the cap in-line of the power wire between the battery and amp.. If their is a great distance between the cap and the amp try making the power wire as short as possible.. I had a similiar problem with a RF cap that had a distribution block on the top of it and it was as simple as adding a bigger power wire....
-------------
Fatgotti Yeah my name is John and I am FAT!! YEAH BABY
Posted By: canuheminow
Date Posted: October 16, 2004 at 9:55 AM
I have 4 guage for power and ground, but I have a fuse distro box between the cap and the amp. Should I run the cap power wire streight to the amp? I have it grounded to where the car bat is grounded to. Should I put it to a totally different ground. I charged the cap prior to use. The power wire from the cap to the distro box is only like 6 inches long and the ground wire is like 10 to 12" long. I have 8 guage power from the fuse box to the amp, with a 8 guage for ground.
-------------
CanUHemi
Posted By: fatgotti
Date Posted: October 16, 2004 at 10:13 AM
Just switch the 8 gauge power & ground for 4 gauge and I garuntee it will make a difference. If it does not work wire it (i always use 4 gauge when it comes to any cap) straight from battery to cap to amp and always keep the wire between the cap and the amp as short as possible.. hope it helps
-------------
Fatgotti Yeah my name is John and I am FAT!! YEAH BABY
Posted By: forbidden
Date Posted: October 16, 2004 at 12:22 PM
What has been done to the stock battery to chassis ground and battery to alternator ground? Definitely upgrade all the power / ground lines to 4 gauge and follow up with what Steven posted about a good solid ground.
-------------
Top Secret, I can tell you but then my wife will kill me.
Posted By: Jay T
Date Posted: October 16, 2004 at 2:23 PM
you need a direct wire to the amp from cap not through distro block. and also you need a short as possible ground. if the cap is in the cab or trunk and its running all the way to the battery thats way too far. double check all grounds and upgrade to 4g wire. Your car is brand new and alternator should have enough juice.
Posted By: kronik66
Date Posted: October 17, 2004 at 2:32 AM
i've seen some people make the mistake of running the cap in series which actually inhibits power flow make sure the cap is wired parallel. ------------- ";P
|