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Old 10-12-2003, 12:25 AM   #1
dumayas
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Default HID Problem: Please help (1999 RS)

I just bought some Lexus GS HID's for my 99rs and modified the headlights to get them to fit. After installing them, my driver side wont turn on consistently.
when it does turn on, it's fine, but there's no consitency to it... no pattern. sometime it will turn on, sometimes it wont.

sorry for the limited info...

---chris----
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Old 10-12-2003, 03:58 AM   #2
atomicapples
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ground the lighting to the chassis of the car.
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Old 10-12-2003, 01:25 PM   #3
dumayas
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Should I tie the negatives togetherthen ground them both to the chasis? Or should I ground them seprately to the chasis, or the one that is giving me problems just ground that to the chasis? Thanks Chris
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Old 10-12-2003, 01:26 PM   #4
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Ground them both.
Check your PMs, I responded to the one you sent me.
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Old 10-12-2003, 03:08 PM   #5
dumayas
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Thanks Mulder I got your PM. I will ground them both, & they were not off projectors. I wil post later on to see if it worked.

Chris
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Old 10-12-2003, 05:52 PM   #6
atomicapples
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Quote:
Originally posted by dumayas
Thanks Mulder I got your PM. I will ground them both, & they were not off projectors. I wil post later on to see if it worked.

Chris
mulder is the electro god
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Old 10-12-2003, 07:31 PM   #7
dumayas
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Mulder,

I did what you said I grounded them both to the chasis and still it does not turn on cocsistently. Out of the five times I turned it on it only turned on once. What do you reccomend that I do.

Chris
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Old 10-12-2003, 07:43 PM   #8
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One thing you can do is connect a voltmeter directly across the power connections at the ballast and watch the voltage readings as you turn them on. If the voltage drops really low (below about 11V) there may be too much voltage drop in the wiring to start the ballasts properly. They draw a lot of current at startup and the wiring has to be able to support that. Since you have a direct ground the only place there can be a drop now is on the positive side. If it turns out this is what is happening you may have to use relays to switch the power directly from the battery.
There could be other things going on as well. I'm not familiar with the Lexus HIDs, perhaps there are other components you don't have that are needed to make them work properly? Not likely but just speculating.
Also are you testing them with the car running or off? Because of the high startup current of the HIDs they may not start reliably with the engine off especially if the wiring is marginal.
The final possiblity is that there is something wrong with them. However if they are both doing the same thing I doubt this is the case.
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Old 10-12-2003, 08:17 PM   #9
dumayas
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Mulder

Thanks alot for your help. I need to get a voltmeter to check on the issue if its getting enought power. By the way fill me in briefly on relays dont know exactly what they are.

Secondly i know the ballasts are ok because sometimes they turn on. I also turn them on with the engine on because I know they use alot of power.

I was reading other threads and read I may need to run relays??? because something like my ecu will think my light is dead and wont power the lights and blah blah blah..this is my specualtion. Where do i also get relays radioshack or pep boys? or is it a specialty item, also is it pricy. Because if it is I might just sell them. The guy that sold me this works at lexus and he has them in his accord which works fine, he also sold them to his car club so they are all running GS HID's which there is a wrx with them. So i got them real cheap, now I really want them in because its a tease when they both work and it looks bad a$$.

So again I appreciate the help, hopefully it is the issue with the relay so I can finally work out this issue.

Chris
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Old 10-12-2003, 08:47 PM   #10
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Ok, I'll explain a few things.
First, your ECU has nothing to do with the lights. There is no electronic control involved, just the headlight switch and associated wiring.
Relays- A relay is basically a fancy switch. It has a coil which, when connected to a power source, becomes an electromagnet and activates a set of contacts causing them to open and/or close (depending on the particular relay and how many/what type of contacts it has). The main reasons we use them are to isolate a control circuit from the device it is controlling, and/or to use a small control current to switch a high-current device on and off. The relay coil only requires a small current to operate but the contacts can switch a much larger current.
For automotive applications such as your headlights, the relays we usually use are standard Hella or Bosch cube-shaped ones that are readily available at most car stereo places for a few dollars. These are rated at 20 or 30 amps for the contacts and are more than sufficient for running headlights, even HIDs. You don't want the off-the-shelf relays from Radio Shack as they aren't up to the task.
To run your lights the coil of a relay would be connected to the low beam headlight circuit in place of a bulb. When the low beams are turned on the coil is switched on and the contacts close. The contacts are connected to the positive battery terminal on one side (through a fuse for safety), and the positive input of the ballast on the other. This provides direct battery power to the HIDs, controlled by the headlight switch via the relay.
I hope this all makes sense to you.
Finally please note what I said about checking the alignment of the bulbs in the housings before using these lights on the street. Nothing wrong with looking bada$$ as long as your lights aren't sending glare all over the place.
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Old 10-12-2003, 09:46 PM   #11
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Mulder

I talked to my friend about it and he clarifed it for me. This looks like that it may take a while if I wanna do it right. So it will take a few days for this to happen (getting the wires, fuses, the relay, etc etc..) I appreciate the help again, The lights are d2r bulbs and are pointed down to avoid glare from oncoming trafficn thanks for the concern. Since I had them in and with both working I never got beamed, I also asked my buddy when we were crusing if they were annoyingly bright when he was driving in front of me, and said it looked like any other hid light and this is a guy that doesnt know anything about cars so I think they are ok. But If you can check the thread in a few days if I got any questions, thanks again

Chris
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Old 10-12-2003, 10:01 PM   #12
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You can always PM me if you need any more info although I do check in here regularly.
Rewiring the lights with relays is definitely a good idea and I do recommend it. But first do the voltage checks to confirm the wiring is a problem. You can also try connecting the ballasts directly to the battery as a test to see how they work, but if you do so be sure to have a 15 or 20A fuse in line so it's safe. This should confirm that the ballasts and bulbs are all in good working condition before you go to the further trouble of rewiring them.
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Old 10-12-2003, 10:12 PM   #13
atomicapples
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relays might do the trick...

but i havent heard of a suabru needing to run relays to start the hid's
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Old 10-12-2003, 11:35 PM   #14
dumayas
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Well atomic im gonna try the relays hopefully this will do the trick. These arent aftermarket HID's these are off a lexus gs, so i have to configure my electrical to make them work, cuz they werent made for my car obviuosly. Again this is assuming that when they are fired up they dont have enough power to turn on because if it doesnt in the begining have enough juice then i dont think they will turn on. Like I said before they dont turn on consistently, but they do work. Like I said previously this is onl on the drivers side It will never turn on in the middle when I am driving, it will either turn on when I first turn them on, or they just dont turn on at all. It doesnt matter if I switch the ballast or bulbs, For some reason it is that side. If anyone has done this before let me know if you ran into any problems.

Chris
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Old 10-13-2003, 01:10 AM   #15
atomicapples
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Quote:
Originally posted by dumayas
Well atomic im gonna try the relays hopefully this will do the trick. These arent aftermarket HID's these are off a lexus gs, so i have to configure my electrical to make them work, cuz they werent made for my car obviuosly. Again this is assuming that when they are fired up they dont have enough power to turn on because if it doesnt in the begining have enough juice then i dont think they will turn on. Like I said before they dont turn on consistently, but they do work. Like I said previously this is onl on the drivers side It will never turn on in the middle when I am driving, it will either turn on when I first turn them on, or they just dont turn on at all. It doesnt matter if I switch the ballast or bulbs, For some reason it is that side. If anyone has done this before let me know if you ran into any problems.

Chris
this link might be helpful in finding those relays

*edit*

forgot the link
http://suvlights.tripod.com/suvlightscom/
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Old 10-13-2003, 01:59 AM   #16
Takashi
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cz - workin yet or not???
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