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oldcorollas
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Kita-Ku, Sapporo, Japan
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January 2003
 
high/low beam? Lets burn a globe out good!!! :D Thu, 09 September 2004 23:25 Go to next message
this may not be much of a tech question but....

for all those with new cars (ie AFTER 1970), with single headlights....

when you have high beam on, are both the high and low beam filament of the single globe on at the same time?
or does the low beam filament switch off?

to me it seems like having both filaments on at the same time could produce too much heat, if the globes are designed to be "OR" rather than "AND".... BUT, since big globes are available (ie 90/120's) and these are small ones (55/60) maybe the heat will not be a problem?

i get so much better light fill with both on that i'm tempted to run both filaments in high beam, rather than having 'driving lights' to fill the low beam void, when high is on...

ideas?
Cya, Stewart

[Updated on: Fri, 17 September 2004 07:38]

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justcallmefrank
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Re: high/low beam? how are yours wired? Fri, 10 September 2004 00:34 Go to previous messageGo to next message
Well considering when you go from low-beam to high beam, all the bit the low-beam was lighting up disappears, I'd say they aren't on at the same time Smile
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oldcorollas
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Re: high/low beam? how are yours wired? Fri, 10 September 2004 01:08 Go to previous messageGo to next message
i know mine's wired that way, but hey, i never had relays in my car (unless you count the flasher can Wink )

so you're saying yours are wired that way too?
Cya, Stewart
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justcallmefrank
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Re: high/low beam? how are yours wired? Fri, 10 September 2004 01:13 Go to previous messageGo to next message
Yep Smile
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Jag7799
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July 2002
 
Re: high/low beam? how are yours wired? Fri, 10 September 2004 01:25 Go to previous messageGo to next message
mine also are wired that way.. they switch over..
but mine also goes from 2 lights on low beam to 4 lights all on high beam

[Updated on: Fri, 10 September 2004 01:25]

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CLG
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Re: high/low beam? how are yours wired? Fri, 10 September 2004 01:54 Go to previous messageGo to next message
Seeing as you've now got spare lights, why don't you chuck the relays in to power both filaments, and lets us know how long they last? If they blow within hours/days/weeks/months, we know it's not worth doing!
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EMP-2TG
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Carlingford, Sydney
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May 2002
 
Re: high/low beam? how are yours wired? Fri, 10 September 2004 03:44 Go to previous messageGo to next message
mine work seperatly on the ke30
if u hold it halfway u get both Razz
well used to, now u get black Sad
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RobST162
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April 2003
Re: high/low beam? how are yours wired? Fri, 10 September 2004 03:51 Go to previous messageGo to next message
what EMP said

some cars if you hold it juuuust between high and low beam, you get DUAL POWAH headlights.. Smile

so only one filament is on at a time..
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CamZH
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Toodyay, WA
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Re: high/low beam? how are yours wired? Fri, 10 September 2004 13:51 Go to previous messageGo to next message
Hey Stu

I've never seen a car that has both filaments in the same globe on at the same time on purpose.... (unless you count brake/tail lamps)


The only car i've ever owned that the low beam didnt turn off when high beam turned on was my ZH Fairlane, but they have seperate high and low beam lamps, like the early Celica's, but unlike the celicas each lamp only has 1 filament.


On my ute i've got 90/130W globes in brand new 7" reflectors.
All of this stuff can be bought from supercheap rather cheaply...
The light from the new 7" lamps is better than the original with the factory driving lights !
but with the Narva 175mm driving lights in place of those it was a different story ! Smile

I dont think its worth trying to run both filaments at the same time, as you suggest it would probably over heat...

But ! If you have sealed beams you might be able to get away with it due to the whole thing being filled with gas...


Cam
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takai
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Adelaide
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May 2003
 
Re: high/low beam? how are yours wired? Fri, 10 September 2004 14:04 Go to previous messageGo to next message
From looking at the wiring diagrams on my sprinter, it should theoretically turn off when the beams are switched, however this isnt the case Sad.
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mrshin
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Montrose, VIC
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Re: high/low beam? how are yours wired? Fri, 10 September 2004 14:41 Go to previous messageGo to next message
If you've got sealed beams, do it anyway, last time I bought any they were that freaking cheap that it's worth the experiment Cool
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oldcorollas
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Re: high/low beam? how are yours wired? Sat, 11 September 2004 14:42 Go to previous messageGo to next message
CLG wrote on Fri, 10 September 2004 11:54

Seeing as you've now got spare lights, why don't you chuck the relays in to power both filaments, and lets us know how long they last? If they blow within hours/days/weeks/months, we know it's not worth doing!


thats an interesting idea! but i'm less keen on cracking the new lenses...

yup, hold halfway to 'flash' and both come on.. and it'ds good! which is what prompted the question...

well, i had sealed beams, and they sucked.. then went to cheap halogen lenses with 90/120's, and they were better, but now with the Hellas and 55/60's they are even better.
i think the answer will be in better globes... either xenon "Plus 50" 55/60's... or 55/100's.. since the low beam is fine.. just the high beam is not "road melting" enough...

hmm, we could do a static test of high beam tho (but without the cooling effect of wind) and see how long thing slast... buggered if i'm gonna sit in front of a globe until it blows tho Wink.. anyone have a datalogging luminesence meter??

thanks for all the ideas Smile
Cya, Stewart

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oldcorollas
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Re: high/low beam? how are yours wired? Sat, 11 September 2004 14:49 Go to previous messageGo to next message
actually.... if someone wants to donate a 12V 20 amp lab power supply, i'll supply globes and "burn the fuckers out" Very Happy.. time to failure to the nearest day Wink

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oldcorollas
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January 2003
 
Re: high/low beam? how are yours wired? Fri, 17 September 2004 07:38 Go to previous messageGo to next message
okay,
i have a donated BRAND NEW Xenon Plus30% globe (i think it's a wagner?) that i want to burn out...

does anyone have a 12Volt 20Amp regulated power supply i could borrow until the globe fails?

Cya, Stewart
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cri_ag
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northern beaches
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August 2002
Re: high/low beam? Lets burn a globe out good!!! :D Fri, 17 September 2004 10:17 Go to previous messageGo to next message
when i switch to high beam my low beams stay on and i havent had any problems yet, aside the bodgey wiring job the previous owner did to make them operate that way!
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river
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Land of Oz
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June 2004
Re: high/low beam? Lets burn a globe out good!!! :D Fri, 17 September 2004 11:12 Go to previous messageGo to next message
Hi,

12V @ 20amp is a pretty hefty DC power supply. You might get one from a computer scrapper. The old AS400 midrange and some of the RS/6000 machines had some pretty hefty switched power supplies that may put out that much.

On the old quad-light Celicas I've seen 150/200W clear lens "aircraft landing light" units replacing the inside hi-beam units. So bright that you can see the spot in your eye image for a long time afterwards. These babies melt the road at night - and probaly your wiring harness unless it's set up correctly.

seeyuzz
river
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Rahvin
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Gold Coast
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June 2004
Re: high/low beam? Lets burn a globe out good!!! :D Fri, 17 September 2004 11:49 Go to previous message
Low beam and hi beam are ment to be two individual circuits.

Having both beams on at once in a single bulb will shorten its life, by how long i don't know.

To work out what amperage you need, add how many watts are being used and divide by twelve. eg 2x100w bulbs=200w divide by 12v=16.67amps.
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