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Old 03-20-2004, 09:54 AM   #1
MrZone
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Default how to re-wire DRL to power high beam instead?

hi all.. i have tried searching about this topic.. but no luck.

Basically - I am about to install JDM light (2002) w/ HID... obviously I must disable DRL or else HID won't function correctly.

I am looking for a way to for the factory DRL system to power my high beam (like Honda) instead of the low beam...

any idea?

Thanks!
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Old 03-20-2004, 10:15 AM   #2
Mulder
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A couple of problems-
Unless you fully disable the DRL module, the headlight power will be on all the time, so even if you moved the DRL-supplied ground to the high beam side the low beam/HIDs would still be on as long as you are using the common headlight power to run them. The only way it would work is if you power the HIDs directly from the battery, and use a relay connected to the low beam switched ground to switch the HIDs on and off by directly grounding the ballasts. The DRL grounding circuit that runs the low beams through the dropping resistor could theoretically then be rewired to the high beam side.
I highly suggest you get a hold of the factory wiring manual and study the headlight circuits.
Another issue here is that by running your high beams as DRLs and having them on all the time, you will be blinding oncoming drivers. Even though the lights would be running at a reduced intensity the light pattern and direction would not change. This is a problem with cars that are manufactured with high beam DRLs, Saturns are the most notorious example.
Of course there is also the issue of the beam pattern of the JDMs being wrong for use in LHD countries, and installing HIDs in them only makes this worse.
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Old 03-20-2004, 10:18 PM   #3
kgb
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I've looked at the MY00 diagram - it's doable, but I don't know at half power will the high beam still be too blinding to use. Granted I haven't got HIDs yet, but one of the reasons I got the Morettes was for this - move the DRL to high beam and keep it so that I can run HIDs on the outer pair. The HID actually will still be relayed thru the headlight circuit, but you have to slice the wires going to the DRL relay (not the module, and you will modify the path to the resistor as well)
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Old 05-14-2004, 05:02 AM   #4
Genner
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umm...this is a newbie question here but...

Seems like everyone is saying you have to disable DRL when installing HIDs for lowbeams if you have the STI headlights....why is that? (i'm planning to have HIDs myself)

Is it because there's not enough power to power them with the DRL enabled?
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Old 05-14-2004, 01:09 PM   #5
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Genner, you'll burn out your lights pretty quick. I think the HID's only use 35w, instead of the stock headlight's 50w. I think the key issue is the HID's will incur unneeded wear.
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Old 05-14-2004, 02:26 PM   #6
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Quote:
Originally posted by kbcr3
Genner, you'll burn out your lights pretty quick. I think the HID's only use 35w, instead of the stock headlight's 50w. I think the key issue is the HID's will incur unneeded wear.
not really since HIDs last approx. 3x longer than normal halogen bulbs.
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Old 05-14-2004, 03:14 PM   #7
Genner
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ok so what's the scoop why do you need to disable the DRLs?
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Old 05-14-2004, 04:27 PM   #8
G-force
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personal preference...leave them on if you want. no damage actually. just shorter useful night time bulb lifespan.

why have the HIDs on during the day though?
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Old 05-14-2004, 11:29 PM   #9
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Quote:
ok so what's the scoop why do you need to disable the DRLs
The DRL's use the low beams at low voltage. The HID's also use the Low beams. Cant do both.
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Old 05-15-2004, 02:58 AM   #10
Genner
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ok so right now I have my resistor pulled from the engine bay. Is that sufficient as far as the DRL disabled to install HIDs?
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Old 05-15-2004, 07:53 AM   #11
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No, go and disconnect the main DRL module by the glovebox to disable the system completely.
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Old 05-15-2004, 03:47 PM   #12
Genner
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ok i will do that thanks very much...

Now I know this is off the original topic but just wondering about this diagram:



Is it cool especially when hooking up HIDs for the lo beam that you just one headlight harness for both lights? What if hi beam and lo beams are both on at the same time. Won't that be too much current for the single wire harness?
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