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Old 10-21-2000, 08:25 PM   #1
Scooby2
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Join Date: Oct 2000
Location: Vancouver, WA USA
Lightbulb Keeping Low Beams On With High Beams

Well after much trial and error with relays and aftermarket modules I stumbled on this on by accident. The way to get your low beams to stay on when your high beams are on is quite simple.

What you will need a peice of wire and a 10 amp fuse for safty reasons.

PLEASE NOTE: THIS IS FOR "NON DRL" LAMP SYSTEMS. ALSO MAKE SURE YOUR LAMPS GO OFF WHEN THE KEY GOES OFF OR IT WILL NOT WORK

1. Take the wire ( or test leads if you have them) and put the fuse in line.

2. Ground one end of the wire on the battery

3. Use the left headlamp then turn on you headlamps and on the headlamp bulb wires there should be a yellow wire (at least mines yellow).

4. Tap in to the yellow wire with something small like a needle or a small awl and using the other end of your lead ground the yellow wire.

5. If this is the correct wire when you turn your High beams on the low beams will stay on also.

6. If this is not the correct wire check one of the other wires with your lead.

7. The reason you have a 10 amp fuse is that if you get the wrong wire it will pop the smaller fuse and not the one on you lights.

8 Once you have found the correct wire all you need to do is ground the wire and make a clean install of the extra wire. You can put a 15 amp fuse in the extra ground wire for a little extra safety.

NOTE: All you need to ground is the left lamp and the right one will also work.
The head lamps are now both on the same fuse and those of you that are running high power lamps may need to install a 20 amp fuse in the factory location.

Hope you find the extra light a blessing as much as I do. Got tired of trying to balance the switch between high and low anly to have it pop back to low at the most inopertune time.

Alternitly you can go under the steering column and find the headlamp switch wiring connector and tap the two wires together ( ones the low beam and the others the ground)



Enjoy.


Scooby2
(Fast Eddy)



[This message has been edited by Scooby2 (edited October 21, 2000).]
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Old 10-21-2000, 09:51 PM   #2
P.K. Motorsports
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Join Date: Mar 2000
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1999 RS
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Thumbs down

Very bad idea. The bulb will overheat and blacken the reflector, the plug housing will melt, the factory wiring harness will be damaged, the bulbs will burn out in rapid succession. It is basically unsafe and gauranteed to leave you with one or zero working lamps at an inopportune time.

Worse, I don't think it would work. The black lead on the left of the plug is the ground. The yellow is highbeam and the blue is lowbeam. Grounding the yellow lead will just produce a short.

A much, much better route would be to get some 90/100s and a heavy-duty wiring harness.

Eddy, I really think you should delete this thread.
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Old 10-21-2000, 10:28 PM   #3
SkToBe
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I'm pretty fairly certain that it's illegal too...
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Old 10-21-2000, 10:44 PM   #4
Scooby2
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well its not illegal and I have it working on my 98 GT and has worked fine so far. The time you run on high beam in minimal and yes the yellow is high beam but, Subaru uses a positive ground to the lamps and I found it works with no ill effects. So scoff if you will but I like the fact that when on High beam I still get Low. And you can't tell me that anybody hasn't run the dimmer switch half way between low and high to get the same effect, that does the same thing.

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Old 10-21-2000, 10:58 PM   #5
Scooby2
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Oh and by the way putting 90/100 will not blacken the reflector? .and 90/100 are legal where you live..Please I have run 90/100 before and they after time will blacken the reflector and melt wiring. I am running PIAA 55/60 Superwhites and they havent blackend the reflectors on any of my prior cars and all of the had the low beams on when the highs were on. So don't knock something you haven't tried yet. Also it would be pretty hard to melt the wiring since the stock 15 amp fuse will blow first and mine hasn't yet.

[This message has been edited by Scooby2 (edited October 21, 2000).]
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Old 10-22-2000, 01:42 AM   #6
Rudypoo
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There is a way to have the low and high beam on with any wiring mods.

With the headlights on (low beam), pull back on the signal lever (as if to use hi-beam flash) but not all the way back. While the lever is near the middle (not at flash posistion yet)the highbeams should come on.

I tried this so it works. It's probably not good for the bulb though.

This was posted in another topic before where people wanted to use their fog lights with highbeams.
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Old 10-22-2000, 03:59 AM   #7
Hoopster
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Try fitting a set of driving lights instead, much safer ! I know the idea was to save cash but it's a false economy. I hope the lights on the WRX are more useful, I would think the HID's would better than current.
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Old 10-22-2000, 09:40 PM   #8
P.K. Motorsports
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Oh and by the way putting 90/100 will not blacken the reflector?

It might. But you could also get a 55/100 if you were worried about that. After all, this setup put out 115 watts on highbeam, which will run considerably hotter than a purpose-designed 100 watt bulb.

and 90/100 are legal where you live..Please

And legality in bulb choice is that much of a concern to you? Please... Anyway, you are at least as likely to get stopped by a cop throwing 115 watts as if you are running 100 watts.

So don't knock something you haven't tried yet.

What makes you think I haven't? I fried the wiring harness on my old Celica trying stuff like this.

Also it would be pretty hard to melt the wiring since the stock 15 amp fuse will blow first and mine hasn't yet.

The wiring is not what melts, it's the plug. And since the circuit is only fused one way, it's conceivable that the return wires could easily carry more than the rating of the fuse. Now 115 watts is only 8 or 9 amps at typical car voltages, but I wouldn't bet that won't get a 16 gauge wire hot enough to burn some insulation off.

Just don't do it.
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Old 10-22-2000, 09:50 PM   #9
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I say do it! Then you can learn your lessons the hard way!

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Old 10-23-2000, 07:41 PM   #10
philrb
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Go to: http://lighting.mbz.org/faq/

Look around there and email Daniel Stern for any lighting concerns....this guy knows his stuff.
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