FixVault

Light Failure Sensor Circuit

Disconnect light failure sensor 12-pin connector, located in luggage compartment. Check light failure sensor circuit values at specified terminals. See Fig 1. Ensure circuit values are as specified. See LIGHT FAILURE SENSOR CIRCUIT VALUES  table. If values are as specified, replace light failure sensor. If values are not as specified, check and repair wiring harness as necessary. See WIRING DIAGRAMS .

LIGHT FAILURE SENSOR CIRCUIT VALUES

Tester Connection Condition Value
1 & Ground Always (1) Continuity
2 & Ground Always (1) Continuity
3 & Ground Always (1) Continuity
3 & Ground Light Control Switch In OFF Position No Voltage
3 & Ground Light Control Switch In HEAD Or TAIL Position Battery Voltage
4 & Ground Ignition Switch In LOCK Or ACC Position No Voltage
4 & Ground Ignition Switch In ON Position Battery Voltage
5 & Ground Always (1) Continuity
7 & Ground Stoplight Switch In OFF Position No Voltage
7 & Ground Stoplight Switch In ON Battery Voltage
8 & Ground Ignition Switch In LOCK Or ACC Position No Voltage
8 & Ground Ignition Switch In ON Position Battery Voltage
9 & Ground Always (1) Continuity
11 & Ground Always Continuity
(1) Resistance is indicated due to bulb in circuit.
Fig 1: Identifying Light Failure Sensor Harness Connector Terminals
G96I07864Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002