 Headlights dimming, just when i turn on my fogs |
 Jun 6, 2007 - 7:53 PM
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 Enthusiast  Joined Feb 14, '07 From Provo, UT USA Currently Offline Reputation: 25 (100%)  |
something i noticed on my car last night when i was driving. if i just have my headlights on it seems that they are brighter than when i have both them and my oem fogs on. has anyone else noticed that on their car? is there a relay or something that would cause that or do i just have a weak battery? nothing serious just something i would ask about.
also what is the bulb # on the silverstars for the lowbeams? thanks guys --------------------  Call me a traitor! See if I care. ;) |
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Jun 10, 2007 - 11:06 AM
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 Enthusiast Joined May 5, '05 From New-Brunswick Canada Currently Offline Reputation: 3 (100%) |
the best way to tell if your alt. is on the way is when idling and you rev, your lights go brighter.
you can measure the running voltage of your alt. with a voltmeter, it should read 13.9V to 15.1V when engine is cold and 13.5V to 14.3V when hot. You can also measure the drop when you turn on your fog lights. Another thing, how did you wire up your fog lights? If you use the headlight wire for power, this would be the reason why everything is going dim. That little wire can't handle the draw and causes a voltage drop when high current is trying to pass thru. -------------------- ----------------------6GC's FIRST V6----------------------
 JDM 96 MR2-T Faster - 94 Celica GT 3MZFE Funner - 99 Rav 4 AWD Handy |
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Jun 10, 2007 - 3:01 PM
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Enthusiast Joined Feb 14, '07 From Provo, UT USA Currently Offline Reputation: 25 (100%) |
QUOTE(K-ESD @ Jun 10, 2007 - 10:06 AM) [snapback]566857[/snapback] the best way to tell if your alt. is on the way is when idling and you rev, your lights go brighter. you can measure the running voltage of your alt. with a voltmeter, it should read 13.9V to 15.1V when engine is cold and 13.5V to 14.3V when hot. You can also measure the drop when you turn on your fog lights. Another thing, how did you wire up your fog lights? If you use the headlight wire for power, this would be the reason why everything is going dim. That little wire can't handle the draw and causes a voltage drop when high current is trying to pass thru. they are stock fogs. and my lights don't get brighter if i rev in idle. they used to but that was because of a bad battery clamp not making a very good connection. but that was fixed months ago. i don't know what it is. maybe it is just my eyes playing tricks on me. oh well. i am pretty sure it isn't the alternator. oh well. nbd thanks guys for your input. -------------------- Call me a traitor! See if I care. ;) |
Posts in this topic
goferris Headlights dimming Jun 6, 2007 - 7:53 PM
coldbluesteel If your driving and they dim, it's probably yo... Jun 6, 2007 - 8:04 PM
goferris QUOTE(coldbluesteel @ Jun 6, 2007 - 7... Jun 6, 2007 - 8:11 PM coldbluesteel Probably a weak alternator then. Jun 6, 2007 - 8:34 PM Gary How old is your battery? Jun 6, 2007 - 9:29 PM goferris QUOTE(Gary @ Jun 6, 2007 - 8:29 PM) ... Jun 6, 2007 - 9:35 PM LewFX i got a spare alternator off my 99 for sale if u n... Jun 6, 2007 - 9:56 PM cnelson how much would a good alt. cost? jw.. Jun 11, 2007 - 5:43 AM LewFX around 100 for rebuilt, used for 50, new is 150+
... Jun 12, 2007 - 10:42 AM Daftboy my friend had this problem with his bonneville wit... Jun 12, 2007 - 11:23 AM topshed Could be a bad earth of course. Jun 13, 2007 - 12:58 PM Hanyo yea it sounds like a bad ground.
does your light... Jun 13, 2007 - 2:01 PM |
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