Section 328 (Fog Light System): Inspection
WARNING: This page is about a different car, the 2003 Lexus GS 430 and 2003 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT FOG LIGHT SWITCH CONTINUITY FOG LIGHT SWITCH CONTINUITY
Switch position Tester connection Specified condition OFF - No continuity ON 11 - 12 Continuity If continuity is not as specified, replace the switch.
- Connector disconnected: INSPECT FOG LIGHT SWITCH CIRCUIT (See FOG LIGHT SWITCH CIRCUIT
)
Disconnect the connector from the switch and inspect the connector on the wire harness side, as shown in Fig 2.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
FOG LIGHT SWITCH CONNECTOR SPECIFIED CONDITIONTester connection Condition Specified condition 11 - Ground Light control switch TAIL or HEAD and dimmer switch LOW or HI Continuity If circuit is not as specified, inspect the wire harness.
- Connector connected: INSPECT FOG LIGHT SWITCH CIRCUIT
Connect the wire harness side connector to the light control and dimmer switch and inspect the connector from the back side, as shown in Fig 3.
FOG LIGHT SWITCH SPECIFIED CONDITIONTester connection Condition Specified condition 11 - Ground Light control switch HEAD and headlight dimmer switch LO and fog light switch ON No voltage 11 - Ground Light control switch HEAD and headlight dimmer switch HI or FLASH and fog light switch ON Battery positive voltage If circuit is not as specified, inspect the wire harness.
- INSPECT FOG LIGHT RELAY CONTINUITY FOG LIGHT RELAY CONTINUITY
Condition Tester connection Specified condition Constant 1 - 2 Continuity Apply B+ between terminals 1 and 2. 3 - 5 Continuity If continuity is not as specified, replace the relay.
- INSPECT FOG LIGHT RELAY CIRCUIT (See INSPECTION )