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

Ls400 headlight auto on/off not working

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Old 08-26-12, 01:51 PM
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SynicalVip
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Default Ls400 headlight auto on/off not working

On my 98 ls400, when I switch my headlight to auto it is not working like it suppose to be, i tried it when it's dark/night and my headlight remains off. Anyone have an idea what could it be? Do this year have that feature?
Old 08-27-12, 12:55 PM
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steve2006
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If you have the "Auto" position on the stalk switch you will have the feature, the sensor is on the top of the dash close to the windscreen make sure it is not obstructed or covered over.
Old 08-27-12, 04:40 PM
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SynicalVip
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Widescreen??
Old 08-27-12, 04:45 PM
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JEL
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Originally Posted by SynicalVip
Widescreen??
Windshield, just at the bottom near the front end of the dash.
Old 08-27-12, 05:01 PM
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Okay I see these two circle one gray one black seem like the gray one can b pop open so I'm thinking that's the sensor? I checked nothing blocking either one
Old 08-27-12, 06:23 PM
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SynicalVip
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I finally pop out the sensor unplug it checked it and reinstall so waiting til night fall and I'll go try it out see if it did anything
Old 09-05-12, 06:53 PM
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So I have taken both sensor out unplug and plug back in and yet still not working, guess ill have to replace them. Anyone know what they are exactly call or where I can find some?
Old 09-05-12, 07:54 PM
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SkulCracka
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could be your switchh. you need to ohm out the sensors see if there bad before buying parts you dont need.
Old 09-07-12, 02:10 PM
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steve2006
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Originally Posted by JEL
Windshield, just at the bottom near the front end of the dash.
Sorry I'm a Brit!
Old 03-12-13, 11:17 PM
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SynicalVip
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Haven't resolve this issue yet, kind of forgot about it lol, but do anyone know where the switch is located at?
Old 03-13-13, 06:42 AM
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TaffyK20si
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First thing I would do is check your fuse boxes. Could be something as simple as a blown fuse. I went through and found a few blown in mine not long ago. Things started working that I forgot that I had. If this isn't the case, do like SkulCracka said and break out the multi meter.
Old 03-13-13, 11:27 AM
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the switch is the stalk itself. you need to make sure the ground it's triggering is still working properly (easier said than done). you need a wiring diagram to show where the harness goes to and what color wires are what. like Taffy said, check the fuses first.
Old 03-13-13, 05:45 PM
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Originally Posted by TaffyK20si
First thing I would do is check your fuse boxes. Could be something as simple as a blown fuse. I went through and found a few blown in mine not long ago. Things started working that I forgot that I had. If this isn't the case, do like SkulCracka said and break out the multi meter.

The fuses under the dash correct?
Old 03-19-13, 12:14 AM
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Did you check the light bulbs? lol
Old 03-19-13, 12:55 AM
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Bulb work fine, high beam work low beam work and parking light work


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