1991 LEXUS SC400 Service Repair Manual

Page 825 of 4087

LEXUS SC400 1991  Service Repair Manual 
(HEADLIGHT SYSTEM)
Description ± Headlight System
The component parts of this system and their function are described in the \
following table.
Parts NameFunction
Light Control SwitchGrounds current

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LEXUS SC400 1991  Service Repair Manual 
System Description ± Headlights
DAYTIME RUNNING LIGHT SYSTEM
The Daytime Running Light (DRL) system is activated when engine is started (However, if the parking brake
lever is engaged when the engin

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LEXUS SC400 1991  Service Repair Manual 
Operation example (Current flow table)
1.  Daytime Running Light Lights Up
SwitchPosition
Ignition switchON (Engine running)
Light Control SwitchOFF
Headlight Dimmer SwitchLO or HI
Condition:    Batt

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LEXUS SC400 1991  Service Repair Manual 
4.  Headlight HI±Beam Lights Up
SwitchPosition
Ignition SwitchOFF or ON
Light Control SwitchHEAD
Headlight Dimmer SwitchHI
Condition:    Battery Voltage " (3)
           Continuity              (20)

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LEXUS SC400 1991  Service Repair Manual 
Parts Location ± Headlight System
±
BODY ELECTRICAL SYSTEM Lighting SystemBE±33 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
Wiring Diagram ± Headlight System
BE±34±
BODY ELECTRICAL SYSTEM Lighting System 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
Wiring Diagram (Contd)
±
BODY ELECTRICAL SYSTEM Lighting SystemBE±35 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
Connector Diagrams ± Headlights
BE±36±
BODY ELECTRICAL SYSTEM Lighting System 
WhereEverybodyKnowsYourName