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post #1 of 15 (permalink) Old 09-12-2007, 10:56 AM Thread Starter
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Default Halogen to OEM HID conversion

Hello everyone,

I'm new here, got my Prius Package 3 about 6 months ago and love it. I recently did a OEM HID conversion (I purchased a HID headlight housing and rewired the plugs), it's much better than putting a HID kit into a halogen housing. I like it alot, but now I realized I've missed something in my plan:

1) Relay: Halogen version uses one bulb for both high and low beam, so the low beam will turn off when the high beam is engaged. The HID flips the reflector within the housing, thus making the light shine higher. Problem is, it shuts off the HID as well. My question is, what can I do about it? (Replace headlight relay so it won't turn off the HID when high-beam switch is on?)

2) Auto-leveling components: After some research I realized that there is a height senor and a auto-leveling ECU. I probably won't be installing these in the near future but am concerned about the aiming. It seems too low IMO, when I follow a car with 2 car lengths, the light won't even shine to the bottom of the car's rear bumper, and I've noticed that a BMW that was beside me with HID has his shining about half way on the bumper, so am I shinning too low? Or is it normal for HID?

Sorry for the long questions, but am eager to find out the answer, thanks so much for all your help in advance.
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post #2 of 15 (permalink) Old 09-17-2007, 09:33 AM Thread Starter
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So I guess newbie don't get answers huh...
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post #3 of 15 (permalink) Old 09-17-2007, 11:51 AM
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Hey, sushi1026,

I don't think your being a newbie is the reason you haven't received any answers. I just think nobody but youreself has done a headlight conversion from halogen to HID because of the high expense difference of not only the bulbs/lights themselves, but also the cost of the additional items required to make the HID's work [such as the relay (that is capable of handling the extra energy required to arc or fire the HID's), ECU controler, level sensor (rear axle to floor pan), & levelor motors behind each headlight that aim the setting on those brighter headlights lower (when you're carry'g extra people and/or cargo in the back so you don't blind oncoming drivers when the front end tilts higher up) based on feedback from the level sensor at the rear axle]. And the level'g system has to be calibrated and/or adjusted by the dealer per their manual.

EDIT : Thanks for back'g my conclusion as well, firepa63, (looks like you & I were typing at the same time). Sushi, there are some here at this site that are good with electronics & at read'g wiring diagrams/schematics, but they may still be trying to decipher just how involved the conversion process is & exactly what is required to make a conversion work properly. You may still hear from them, although you may not be happy with what you hear. And yes, when the level sensor at the rear axle fails (or is not included as part of the HID system) it seems that it is normal for the HID's to dip to an extremely low aim that only illuminate about the first 20 feet in front of your car (& nothing at all beyond that). My rear sensor failed & that's what I experienced.

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post #4 of 15 (permalink) Old 09-17-2007, 11:51 AM
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Your post has had over 140 views and so far no answers ... It might be that no one here has done this conversion and therefore cannot answer your questions.
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post #5 of 15 (permalink) Old 09-18-2007, 10:23 AM Thread Starter
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Sorry for being dis-respectful, I apologize for that newbie comment, shouldn't have said that in the first place.

Thanks for the pointers, I didn't install the height senor and the leveling ECU. But so far the original relay is doing fine, although I'll be obtaining the HID relay soon (maybe from Toyota or something). The aim motor mounted on the headlight housing came with the light and the guy was nice enough to include all the wire connectors as well. I just rewire those wires and leave the aim motor wires alone for the time being and everything is in order.

Well, maybe I'm the first one here to do the conversion, so maybe I should instead offer this as a how-to. =P Again please accept my apology for my dis-respectful comment before.
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post #6 of 15 (permalink) Old 09-18-2007, 12:55 PM
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Hi, sushi1026,

I, personally, didn't think you were being disrespectful because you had waited patiently for 5 days with no responses. I just took it as a bump to move your post up towards the top for more visibility to tempt a response.

Thanks for the offer to give us a "how to" on this conversion that others may possibly have considered but didn't know where to begin. You, as an HID converter, are likely walk'g as a pioneer on some un-trodden ground as far as that conversion goes. Your offer to share your info is what this site is all about (sharing & help'g each other out) & we wish you success in your conversion.

I'm glad the motors are integral with the units you got (I never took a close look at mine) & since it's very difficult (if not impossible) to distinguish from the outside the difference between the halogens & the HID's, your conversions are less likely to be stolen since your Pkg 3 doesn't have fog lights (does it?). The presence of fog lights is a dead giveaway to thieves that a Prius is equiped with HID's (since the 2 always go together in the option pkg's).

We wish you a successfully operat'g conversion & many years of happy motor'g.

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post #7 of 15 (permalink) Old 09-21-2007, 09:08 PM Thread Starter
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Thanks for the encouragement.

No i don't have the foglights. I thought about getting it as well but decided against it, the HID is sufficient for the time being.

I might try to find a way to wire the leveling motor to at least give me some control to aim it from the inside. The high-beam / low-beam situation is the one I'm working on now, I spoke with the guy who sold me the HID housing on ebay and he is willing to supply me with the relay, I hope that will resolve the situation I have (no high-beam).

The conversion is almost plug-and-play, the connector needs to be rewired but that's no big deal, an ohm meter to determine which one is low beam and which one is high beam and that's it.
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post #8 of 15 (permalink) Old 09-22-2007, 01:28 PM
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The only unfortunate thing about this is to be legal, you MUST install the leveling equipment. All HID lamp equipped cars in the US and Canada must have automatic leveling.

I don't know what your chances of getting caught are, but for anyone else thinking this is easy, it's important information.

And yes, just about all the HID conversion kits on e-Bay are illegal.

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Pearl is a 2007 Driftwood Pearl Prius
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post #9 of 15 (permalink) Old 09-22-2007, 06:44 PM Thread Starter
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Good to know, but my conversion is a OEM HID light and housing along with auto-leveling motor directly from a package 4+ vehicle. So yes, this one IS going to be legal.
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post #10 of 15 (permalink) Old 09-22-2007, 07:41 PM
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Quote:
Originally Posted by David Beale
The only unfortunate thing about this is to be legal, you MUST install the leveling equipment. All HID lamp equipped cars in the US and Canada must have automatic leveling.

I don't know what your chances of getting caught are, but for anyone else thinking this is easy, it's important information.

And yes, just about all the HID conversion kits on e-Bay are illegal.
Tell that to Acura Canada lol. None of their cars have headlight levelling (auto or manual)

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