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Home >> Lexus >> 2003 >> SC 430 V8-4.3L (3UZ-FE) >> Repair and Diagnosis >> Lighting and Horns >> Dimmer Switch >> Testing and Inspection
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Dimmer Switch: Testing and Inspection




INSPECT LIGHT CONTROL RHEOSTAT
a. Check continuity between terminal 1 and 2 of light control rheostat when light control rheostat operation as shown in the chart.




b. Check light control rheostat resistance.
1. Measure the resistance between terminal 1 and 3 of light control rheostat.
Standard resistance: Approx. 10 kOhm
2. Measure the resistance between terminal 1 and 4 of light control rheostat when operating the light control rheostat. Check that the resistance value changes continuously.

Standard resistance:
When turned fully clockwise: Approx. 10 kOhm
When turned fully counterclockwise: Approx. 0 kOhm
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