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

Daytime running lights?

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Old 07-27-11, 06:24 AM
  #16  
ls400rgr
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Originally Posted by PureDrifter
high beams are 9005 single filaments bulbs.

approx 30-50% power yields DRL
Pure Drifter - is the (probable) solution to replace the 9005 single filament bulb?
Old 07-27-11, 12:39 PM
  #17  
McPierson
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I'm not PD, but I would assume that if you brights work the bulb is ok. It's likely the control module.

On my *cough prelude* I had to go in a re solder a few contacts. I expect it would be a fairly simple circut even if it's in a Lexus.
Old 07-27-11, 02:03 PM
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it seems like a wiring issue more than the control module, but check both.
Old 07-27-11, 07:56 PM
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emarknot
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just for you, I pulled the headlight wiring diagram from the computer today.

it seems that the dlr's a controlled by a total of 3 relays. and 5 fuses.


so....working with the "we know we have some power" theory.....

power comes out of the dlr2 relay...engine room junction block on left side of engine compartment forward of the strut tower.....then power goes to th .........oh blah blah........ok , there are 2 relays that control the dlr's.......a right side and a left side.......switch the relays and see if the if the dlr's switch sides. if they do, then the relay needs to be replaced.

daytime running light relay 3&4....at right front corner of engine compartment
Old 07-28-11, 05:47 AM
  #20  
ls400rgr
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Thanks - I'll give it a try and let you know how I make out -

Do you have the headlight wiring link?

Originally Posted by emarknot
just for you, I pulled the headlight wiring diagram from the computer today.

it seems that the dlr's a controlled by a total of 3 relays. and 5 fuses.


so....working with the "we know we have some power" theory.....

power comes out of the dlr2 relay...engine room junction block on left side of engine compartment forward of the strut tower.....then power goes to th .........oh blah blah........ok , there are 2 relays that control the dlr's.......a right side and a left side.......switch the relays and see if the if the dlr's switch sides. if they do, then the relay needs to be replaced.

daytime running light relay 3&4....at right front corner of engine compartment

Last edited by ls400rgr; 07-28-11 at 06:13 AM. Reason: asking for associated internet link
Old 07-28-11, 06:59 AM
  #21  
emarknot
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not a link....
Its from mitchell 5



I had to print the diagram and then bring the papers home.
Old 07-29-11, 06:01 AM
  #22  
emarknot
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did you try swapping the dlr relays yet?

just curious
Old 07-29-11, 11:13 AM
  #23  
ls400rgr
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Not yet - will try tonight

Originally Posted by emarknot
did you try swapping the dlr relays yet?

just curious
Old 07-29-11, 06:54 PM
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ls400rgr
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Rt Front corner of engine compartment (I presume as you are oriented from the driver seat). Looked tonight when I go home, didn't see relay #3 & 4. Did see DRL relay #2 forward of the from strut. Do I need to remove anything to get at relay #3 &#4. (I did have poor lighting, will be better in the morning when I try again). Thanks
Old 07-29-11, 08:20 PM
  #25  
emarknot
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im going to say yes, its on the right side, if in passenger seat. the orientation of the vehicle is left and right....aways looking towards the front of the vehicle.

and if you stood in front of the car looking towards the rear.....the right side will still be the right side, even though it is now on your left.



and according to the diagram,3&4 should be in a black box our atleast covered with a lid and about six inches long. the diagram shows the relays together, but the box or cover is its own unit. and under the lid, it should say "dlr-r" and "dlr-l"

hope thats not confusing
Old 07-30-11, 12:47 PM
  #26  
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Originally Posted by emarknot
im going to say yes, its on the right side, if in passenger seat. the orientation of the vehicle is left and right....aways looking towards the front of the vehicle.

and if you stood in front of the car looking towards the rear.....the right side will still be the right side, even though it is now on your left.



and according to the diagram,3&4 should be in a black box our atleast covered with a lid and about six inches long. the diagram shows the relays together, but the box or cover is its own unit. and under the lid, it should say "dlr-r" and "dlr-l"

hope thats not confusing
Not having any luck - went to right front where the air filter is, removed the air filter and cover, to get a better look, no luck, not finding a box with cover having DRL #3 or 4 - any thoughts
Old 07-30-11, 02:11 PM
  #27  
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post a clear pic of your engine bay, particulary the right side...may I can spot it for you.....
Old 07-30-11, 05:43 PM
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ls400rgr
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Originally Posted by emarknot
post a clear pic of your engine bay, particulary the right side...may I can spot it for you.....
Hope the photos help
Attached Thumbnails Daytime running lights?-dscn0275.jpg   Daytime running lights?-dscn0276.jpg   Daytime running lights?-dscn0277.jpg  
Old 07-30-11, 06:44 PM
  #29  
emarknot
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im not seeing it either....it must be under something.

follow the wire harness from the headlights and see where it goes.

im begining to wish conn. was closer to az right now.

sorry, all I have is the wiring diagram and what it states.
Old 07-30-11, 08:57 PM
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hope this help
https://docs.google.com/document/pub...Nb5fGjoW0VP8VA

Last edited by bornpeace; 07-30-11 at 09:07 PM.


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