[jon456]

I have a 98 XLS is there a way to adjust them to turn on sooner without taking it to the dealer?

 

[CupCate18]

I think the only way is by a dealer.

 

[csaxon]

The sensor has an iris that can be rotated about 180 degrees. Just turn it left or right to adjust.

 

[csaxon]

Another poster gave this reference "from gen2 service manual)

the sensor is located on the driver side next to the front windshield vent on my gen2.

page BE-21
12. ADJUST AUTOMATIC LIGHT CONTROL SENSOR
(a) Adjustment of the light control is performed by turning the
sensitivity knob on the sensor.
(b) This will be determined at what light condition the automatic
control will take place.

If response is too quick, turn the knob counterclockwise.

If response is too slow, turn the knob clockwise

 

[jon456]

There isn't a knob, its just an eye.

 

[njerald]

Duh, like experiment by covering part of the eye with electrical tape........

or pay the dealer to do it electronically.