Light Failure Sensor Circuit
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect the connector from the sensor and inspect the connector on the wiring harness side. See CONNECTOR IDENTIFICATION . See INSPECTING LIGHT FAILURE SENSOR CIRCUIT table. If the circuit is as specified, replace the sensor. If the circuit is not as specified, inspect the circuits connected to other parts.
INSPECTING LIGHT FAILURE SENSOR CIRCUIT
| Tester Connection | Condition | Specified Condition | ||
|---|---|---|---|---|
| 1 - Ground | Constant | Continuity (1) | ||
| 2 - Ground | Constant | Continuity (1) | ||
| 9 - Ground | Constant | Continuity (1) | ||
| 11 - Ground | Constant | Continuity | ||
| 3 - Ground | Light Control Switch OFF | No Voltage | ||
| 3 - Ground | Light Control Switch TAIL Or HEAD | B+ Voltage | ||
| 4 - Ground | Ignition Switch LOCK Or ACC | No Voltage | ||
| 4 - Ground | Ignition Switch ON | B+ Voltage | ||
| 7 - Ground | Stop Light Switch OFF | No Voltage | ||
| 7 - Ground | Stop Light Switch ON | B+ Voltage | ||
| 8 - Ground | Ignition Switch LOCK Or ACC | No Voltage | ||
| 8 - Ground | Ignition Switch ON | B+ Voltage | ||
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