why my car’s lights are weak
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=39731
Printed Date: July 05, 2025 at 2:52 AM
Topic: why my car’s lights are weak
Posted By: photoguy
Subject: why my car’s lights are weak
Date Posted: September 25, 2004 at 4:07 PM
hello everybody
when i turn on head lights the consoles lights become weeker and when i turn on air condition they about to get lost and the headlights become weeker, and when the bass of the amplifier booms ( its only 45* 4 watts) the lights go away and come back.... however i have changed the accu last week what should i do???
Replies:
Posted By: kgerry
Date Posted: September 25, 2004 at 4:34 PM
i apologize for being dense... what's an accu?
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: pimpincavy
Date Posted: September 25, 2004 at 10:07 PM
Sound like a bad alternator to me. What kind of car is it? How many amps is the alternator? How many amps is your amp pulling? If you give us some more info we will be better able to help you out.
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Posted By: photoguy
Date Posted: September 26, 2004 at 11:41 AM
hey well first of all i wanna thank you for reading, (KGERRY...an accu is the battery of your car) my accu is 45 amp and its pulling a toyoyta corolla station engine air condition, flash light 4*45 amplifier etc... i dont know how many amps is the alternator.... thanks again for reading
Posted By: DYohn
Date Posted: September 26, 2004 at 1:49 PM
Yep, sounds like a bad alternator or voltage regulator - or maybe even a badly slipping belt on the alternator. The stereo is not large enough to put a significant drain on the electrical system so something is broken. ------------- Support the12volt.com
Posted By: forbidden
Date Posted: September 26, 2004 at 4:25 PM
Make sure that the terminals are tight on the battery (accu). To me it also sounds like a voltage regulator issue or a bad alternator.
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Top Secret, I can tell you but then my wife will kill me.
Posted By: AJRXtreme
Date Posted: September 26, 2004 at 7:55 PM
wow u have to be a nub. Im going to try to be nice about this. You will need a capacitor to keep your head lights from dimming.
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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: SoundFX411
Date Posted: September 26, 2004 at 8:26 PM
AJRXtreme wrote:
wow u have to be a nub. Im going to try to be nice about this. You will need a capacitor to keep your head lights from dimming.
I'm sorry I have to disagree with AJRXtreme. If that car needs a cap for a 45x4 amp, WOW this must be something new on the market that i haven't seen before. I have to agree with everyone else, you should have an alternator or voltage regulator problem. Put a DMM on the battery and with the car running, check the voltage and then put on the AC then lights etc. and see if the voltage drops.
Posted By: pimpincavy
Date Posted: September 27, 2004 at 11:33 AM
A cap is definatly NOT NECESSARY! I think AJR extreme is the nub.
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Posted By: fuseblower
Date Posted: September 27, 2004 at 12:14 PM
Sounds like a lose belt or a bad alternator.
Posted By: Ravendarat
Date Posted: September 27, 2004 at 12:18 PM
Ya no cap needed in this case, just a quick inspection of the charging system and replace what ever part is found to be broken, because there is definatly something wrong here.
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
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