1993 Lexus LS 400 Dashboard lights

EPWEBERJR

MEMBER
1993 LEXUS LS 400
V8
2WD
AUTOMATIC
13,700 MILES

My dashboard lights (speedometer, tach, fuel gage) do not come on if the car has been sitting out in freezing temperature. I sometimes have to drive for 20" or so before the lights work, then they are OK. Any thoughts on how I can fix this problem?

1 Reply

DAVE H

MECHANIC
13,383 POSTS

LIGHT SENSOR
NOTE:Adjust light sensor if headlights come on too early or too late.

It may be necessary to remove light sensor to access adjusting screw (requires removing instrument panel safety pad). See LIGHT SENSOR under REMOVAL & INSTALLATION. If headlights come on too early, turn adjusting screw on light sensor counterclockwise. See Fig. 1 . If headlights come on too late, turn adjusting screw clockwise.
Fig. 1: Adjusting Light Sensor (LS400)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
SYSTEM TESTING
SYSTEM OPERATIONAL TEST
Turn ignition on. Turn headlight switch to AUTO position. Gradually cover the light sensor. Headlights and instrument panel lights should come on. Gradually expose the light sensor. Lights should turn off.
Gradually cover the light sensor. Wait for lights to come on. Lights should turn off under any of the following conditions.
Headlight switch is turned to OFF position.
Light sensor is exposed.
Ignition is turned off and driver's door is opened.
Turn ignition off. Open driver's door (leave it open). Ensure light sensor is exposed. Turn ignition on. Lights should turn off.