DIY: OEM JDM HID Headlight Conversion

[enviri]

splice away.

[govtec]

Enviri - Need your help urgently while I'm doing the installation...So far I've installed one side of the JDM HID lights on the passenger side and after I've plugged everything in, the parking light is constantly on without the keys in the ignition. Even after I start the car, the low beam and the rest of the lights do not come on in the JDM HID headlights while my US headlight on the driver side functions normally. What am I missing?

[govtec]

On post # 31 you had mentioned something about an extra ground going from the green/black parking light wire to the chassis...After I spliced the extension parking light wire, I connected one of the wires to the black parking light wire in the headlight housing. Is this what you meant by post # 31? Or is there another step I'm missing. I'll get to my parents house later this afternoon and I'll check all the wires and plugs again just to make sure I didn't miss anything.

Thanks

[govtec]

I'm ordering another pair of T10 and H4 plugs because the ones I got are of bad quality. I also blew out the tail light and passenger low beam fuse.

[enviri]

something tells me that there is definately a crossed wire somewhere, grounded to the chassis or not. CTScott recommended we grounded the parking light to chassis for safety reasons.

[govtec]

Update...I finally received the relay wiring harness that fredovvti had suggested I use to solve the power issue for the JDM headlight. I ordered it from Amazon...https://www.amazon.com/LIGHTING-Cera...op_mb_pd_title. After I finished with the installation and drove home from my parents house, the low beam (hid bulbs) would flicker when I start the ignition and the switch stalk is turned off and the blue high beam CEL would come on the dashboard. The light would continue to flicker when I turn on the parking light with the first turn on the light switch stalk. When I turn on the low beam, the flickering stops and I get a solid beam. The same holds true for the high beam as well when I push the light switch back.

Any idea where I should look?...I grounded both the H4 relay harness and Parking Light on the passenger side to the chassis located on front near the radiator. I grounded the Parking Light and H4 relay harness on a factory ground bolt near the air intake duct on the driver side.

Check out the pics as well as the video of the lights flickering.

Any suggestion on where to look or alternative grounding location is appreciated.

Thanks

https://drive.google.com/open?id=1E9...pMG96lJhJfjb1c

https://drive.google.com/open?id=1KC...3i2HiLmm8gEMm4

https://drive.google.com/open?id=1Md...HXMxClRw_NOuYp

https://drive.google.com/open?id=1jG...t9kXnwhQu4yVql

https://drive.google.com/open?id=1B6...OdjsJRlmW88baY

https://drive.google.com/open?id=1AK...IjaiTMbxVytDzX

https://drive.google.com/open?id=1zV...Li9mlopeuabTtd

https://drive.google.com/open?id=1oh...QhNkrBYHgKSSCU

[govtec]

Problem solved!...I disabled the DRL and the rest of the lights no longer flickers!

[DeeBee]

Originally Posted by ezhacker1

H4 Connector is switched ground. Low and Hi has their own ground pin.

Based on Enviri connector photo and pin orientations im guessing

Red Low Beam
Black Hi Beam
Green Parking
Black 12v.

Hi all,

I know this is an old thread but I just found it recently and ordered a set of JDM HID headlights for my ride.

I was hoping to get clarification on the wire orientation to connect from the H4 to the HID connectors.

Black is quoted as 12V, Hi Beam, and in some cases, Ground.
Could you please help me out with the correct orientation.

Thanks in advance,
DeeBee

[govtec]

Originally Posted by DeeBee

Hi all,

I know this is an old thread but I just found it recently and ordered a set of JDM HID headlights for my ride.

I was hoping to get clarification on the wire orientation to connect from the H4 to the HID connectors.

Black is quoted as 12V, Hi Beam, and in some cases, Ground.
Could you please help me out with the correct orientation.

Thanks in advance,
DeeBee

What I did was basically followed the orientation of the 4 prong pins that enviri showed in the videos. If you do that you should be fine and just trace it back to the plugs in the headlight to confirm the orientation.

[govtec]

Don't forget to pull your DRL relay in post #62 so your lights don't flicker.

[DeeBee]

Originally Posted by govtec

What I did was basically followed the orientation of the 4 prong pins that enviri showed in the videos. If you do that you should be fine and just trace it back to the plugs in the headlight to confirm the orientation.

Thank you for your help. I was able to get the wiring done.
I tested them with a battery charger and they worked well

When I plugged them into the car the HID do not come on
All other lights turn on. I know the bulbs work so it must be something to do with the car's stock wiring. I get the feeling there is not enough power to turn on the HID ballasts. I am not using a wiring harness.

Is everyone who has them working using a wiring harness? Please help me solve this before Christmas. I'd like to have them working for a road trip then.

[DeeBee]

Originally Posted by govtec

Don't forget to pull your DRL relay in post #62 so your lights don't flicker.

Thank you for the reminder

We don't have DRL on the '06 here in Australia so that won't be an issue for me.

[IllusionX]

Originally Posted by DeeBee

Thank you for your help. I was able to get the wiring done.
I tested them with a battery charger and they worked well

When I plugged them into the car the HID do not come on
All other lights turn on. I know the bulbs work so it must be something to do with the car's stock wiring. I get the feeling there is not enough power to turn on the HID ballasts. I am not using a wiring harness.

Is everyone who has them working using a wiring harness? Please help me solve this before Christmas. I'd like to have them working for a road trip then.

The Yaris have a ground switch. You may have the wires reversed

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[DeeBee]

Originally Posted by IllusionX

The Yaris have a ground switch. You may have the wires reversed

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Hi IllusionX,

Thanks for your suggestion. I think the wires are ok since I get power to all other bulbs. In fact I tried swapping positions and the high beams came on at the low beam position.

My suspicion is that somehow there is insufficient power to turn on the HID ballast. I know they work because I have tested them with a portable battery charger and they light up well.

I had a Rav4 where the factory wiring powered HID projectors I had retrofitted without a wiring harness. I drove that for 7 years no problem. I expected the same from my little Yaris

[DeeBee]

Originally Posted by govtec

What I did was basically followed the orientation of the 4 prong pins that enviri showed in the videos. If you do that you should be fine and just trace it back to the plugs in the headlight to confirm the orientation.

BTW govtec,

The videos aren't available any longer so I'm not able to see if indeed my wiring is off.

[DeeBee]

Oh how I envy all of you that have these lights working.

I'm so close yet it feels so far off.... I hope to get this issue resolved and have the ability to see clearly in the dark.

[stidnam]

I've looked up the EWD for the P90 Yaris and here's a few points to help you out.

As previously mentioned, the factory halogens are negatively switched. Assuming you had a H4 plug on the stock bulb, then you'll have one positive wire for each side and two negatives to switch between hi/lo. The factory wiring should be coloured as such

- RH positive = Black
- RH Hi ground = Green
- RH Lo ground = Blue

- LH positive = Grey
- LH Hi ground = Brown
- LH Lo ground = Blue

As with all wiring jobs, you should be testing everything with a multimeter as opposed to smashing some wires together and hoping for the best.

I haven't read back through this entire thread to compare everything with the wiring diagram, but here's a basic run down of things you should know

- Because the high and low beam run off the same positive wire, you only have a 10amp fuse for each headlight. This is probably borderline for just running the HIDs - ideally it'd be 15amp, but it's not enough to be running both the HIDs and the Hi beams, which leads me to my next point
- It's very likely that the JDM headlights have been designed to run both the HID and the Hi beam at the same time when you switch on the Hi's. If you look at the reflector bucket you'll notice it has two distinct sections - the upper for the HID lo beam, and the lower part for the hi beam. If these are anything like the 3rd gen JDM lights then running the hi beam without the low beam will produce two elevated spot lights in front of your car, but you'll have no width to the high beams. For this you'll need to wire the lo beams to stay on when you flick to hi beams. You should test the high beams out first, but I highly doubt Toyota designed these to be flicking between hi and lo with the lo being a HID setup. It takes way to long for HIDs to warm up and flicking them on and off shortens their life and the ballasts life.
- Re the above, I'm not even sure if the JDM headlights are positive or negatively switched, or how they've wired up the relays/computer to handle the HIDs.

If I were you I'd be building a new headlight harness with a few relays that are triggered off the factory wiring and wire these things up properly. Even better if you could get the factory wiring diagram ;) - https://page.auctions.yahoo.co.jp/jp/auction/g212047863

If you wanted to do it quick and dirty you could potentially just wire the lo beams in to get the hids working and then sort the hi beams out later.

I've been meaning to write up a piece on how to do all this to a third gen, which is conveniently positively switched with individual fuses per lo/hi beam, which makes things oh so much easier.

If I had my time again, I'd probably just throw bi-xenon morimoto projectors in my lights. While JDM reflector based HIDs are better than the halogens they replace, they have nothing on a good projector setup. Light output and cut off is just not the same :(

Oh and if you're in a country that drives on the right hand side - please don't do this conversion. Think of your fellow motorists. The cut off kicks up to the left. You'll just be blinding oncoming traffic or you'll have the lights set so low they'll be useless.

[IllusionX]

Originally Posted by DeeBee

Hi IllusionX,

Thanks for your suggestion. I think the wires are ok since I get power to all other bulbs. In fact I tried swapping positions and the high beams came on at the low beam position.

My suspicion is that somehow there is insufficient power to turn on the HID ballast. I know they work because I have tested them with a portable battery charger and they light up well.

I had a Rav4 where the factory wiring powered HID projectors I had retrofitted without a wiring harness. I drove that for 7 years no problem. I expected the same from my little Yaris

Like stidnam said, you may want to use a voltmeter to make sure you get the correct ground and positive. Halogen bulbs don't care about polarity, but polarity is very important with HID.

H4 was designed with a common ground and 2 positive, but the Yaris has a common positive like mentioned above.

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