Light Failure Sensor Circuit
WARNING: This page is about a different car, the 2003 Lexus GS 430, 2003 Lexus GS 300, 2002 Lexus GS 430, and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect the connector from the light failure sensor and inspect the connectors on the wire harness side. See CONNECTOR IDENTIFICATION . See INSPECTING LIGHT FAILURE SENSOR CIRCUIT table. If the circuit is as specified, replace the relay. If the circuit is not as specified, inspect the circuits connected to other parts.
INSPECTING LIGHT FAILURE SENSOR CIRCUIT
| Tester Connection (Wire Color) | Condition | Specified Condition | ||
|---|---|---|---|---|
| 1 (Green/White) - Ground | Constant | Continuity (1) | ||
| 2 (Green/Yellow) - Ground | Constant | Continuity (1) | ||
| 6 (Green/Red) - Ground | Constant | Continuity (1) | ||
| 7 (Green/Yellow) - Ground | Constant | Continuity (1) | ||
| 11 (White/Black) - Ground | Constant | Continuity | ||
| 12 (Green/Red) - Ground | Constant | Continuity (1) | ||
| 5 (Green) - Ground | Light Control Switch OFF | No Voltage | ||
| 5 (Green) - Ground | Light Control Switch In TAIL Or HEAD | B+ Voltage | ||
| 8 (Red/Blue) - Ground | Ignition Switch In LOCK Or ACC | No Voltage | ||
| 8 (Red/Blue) - Ground | Ignition Switch ON | B+ Voltage | ||
| 9 (Green/White), 10 (Green) - Ground | Stop Light Switch OFF | No Voltage | ||
| 9 (Green/White), 10 (Green) - Ground | Stop Light Switch ON | B+ Voltage | ||
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