LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

93 ls400 hids not lighting up

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Old 02-02-14, 10:58 AM
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msweber97
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Default 93 ls400 hids not lighting up

started putting in my 35w hids and hooked up the drivers side and had to move the pins to get positive on the low beam side since im only running a low beam kit not high and low. Hooked it all up and turned lights on and nothing. i know the lights are good cause i hooked them up to my jeep and came on with no problem. Anyone else have issues with this?
Old 02-02-14, 01:21 PM
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rick1987
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Well ether your not getting power or there is no ground.

do you have a multimeter? check to see if you have power.


I dont mess with the cheap chinese kits. they dont last.

I go on ebay and buy OEM used parts.
Old 02-02-14, 04:11 PM
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Yamae
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Originally Posted by msweber97
started putting in my 35w hids and hooked up the drivers side and had to move the pins to get positive on the low beam side since im only running a low beam kit not high and low. Hooked it all up and turned lights on and nothing. i know the lights are good cause i hooked them up to my jeep and came on with no problem. Anyone else have issues with this?
There are poorly designed aftermarket HIDs a lot in the market these days. Those don't have a peak current control circuit and it causes too much inrush current. This often opens the fuse.

You need to check the DC supply to your HID as rick1987 states first. I'd say, you should check it before you post.
Old 02-02-14, 06:04 PM
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AtlasLS400
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Reverse polarity? Mine didn't work at first had to flip the wires around. You tube it.
Old 02-02-14, 06:29 PM
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python
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either way Chinese made lights are not the way to go..if u paid under 200 dollars for the kit then toss it in the trash
Old 02-02-14, 08:33 PM
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rick1987
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Originally Posted by python
either way Chinese made lights are not the way to go..if u paid under 200 dollars for the kit then toss it in the trash
^this!

here is a ballast i have used before.
http://www.ebay.com/itm/1999-to-2004-Audi-A6-Allroad-RS6-Xenon-Headlight-HID-Ballast-Control-Unit-Module-/400655844377?pt=Motors_Car_Truck_Parts_Accessories&hash=item5d48f30419&vxp=mtr
and projector.

http://www.ebay.com/itm/02-04-AUDI-Hella-A6-S6-RS6-Xenon-HID-D2S-PROJECTORS-3-Lens-PAIR-CHICAGO-/390759302384?pt=Motors_Car_Truck_Parts_Accessories&hash=item5afb11c4f0&vxp=mtr

retro fit them in and your good to go. OEM quality hids that will last.
Old 02-03-14, 09:17 AM
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msweber97
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I got the kit from ddm tuning, never had problems with any of their kits I'm going to go back through the whole thing again even I get a chance I did find that my fuse for the headlight did blow sometime during this process so hopefully that was the only problem and thanks for the suggestions!
Old 02-03-14, 01:05 PM
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KYLS400
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DDM offers an accessory wiring harness that utilizes a relay and allows you to wire directly to the battery.
Aftermarket HID kits use less energy after igniting, but can require more energy to get the bulb/ballasts to light up.

I've used kits from both DDM and Xentech with good results, but do suggest the relay and harness.
Old 02-03-14, 08:32 PM
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msweber97
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I have the relay harness on my jeep since I'm running the 55w system in it didn't get it for this 35w system
Old 02-03-14, 10:01 PM
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Yamae
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My 98 Celsior has HIDs originally and I don't need to buy any HID kits but I have been in use of this below for my night project for the past several years. It has a HID bulb inside with a ballast and a DC power supply underneath. Originally a high power quartz lamp was inside there and consumed 500W of power. It radiated too much infrared energy and I felt quite uncomfortable doing jobs under or side of this especially during summer seasons and I wanted a bright LED light. But LED lights those days were not bright enough or too expensive.

I thought the HID bulb would be nice for my purpose and I made this. The DC power unit is 12.6V 10A. I thought 10A was enough for a 35W bulb including a start up. But it was not. The ballast needed more than 10A to start up and the bulb did not turned on. I did modifications to the DC power unit to be able to supply some more peak DC current changing the current limiter and also added a big electrolytic capacitor.

As I measured the DC current using a current probe and an oscilloscope, it required peaking 15A at the start up. I never thought that a 35W bulb needed that much. This was partly because the ballast was not designed well. The other day, I tried a Japanese manufacturer Koito's one and it worked fairly well with a much smaller DC power unit.
Attached Thumbnails 93 ls400 hids not lighting up-hid-light.jpg  
Old 02-03-14, 11:44 PM
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cobalt91
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Thats a nice work light ya got there Yamae.
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