Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 161 (STEERING COLUMN SWITCHES)CIRCUIT TESTSLIGHT CONTROL SWITCH CIRCUIT
2004 Toyota Matrix XR, FWD, Standard
Light Control Switch Circuit
2004 Toyota Matrix XR, FWD, StandardSECTION Light Control Switch 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.
- Connector Disconnected -
Inspect the light control switch circuit. See LIGHT CONTROL SWITCH CIRCUIT under CIRCUIT TESTS in BODY CONTROL SYSTEMS
article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT. Disconnect the connector from the switch and inspect the connector on the wire harness side. For the front side of the combination switch connector, see CONNECTOR IDENTIFICATION . See INSPECTING LIGHT CONTROL SWITCH CIRCUIT (DISCONNECTED) table. If the circuit is not as specified, inspect the wire harness. See WIRING DIAGRAMS .INSPECTING LIGHT CONTROL SWITCH CIRCUIT (DISCONNECTED)
Tester Connection Condition Specified Condition 16 - Ground Constant Continuity - Connector Connected -
Inspect the light control switch circuit. Connect the wire harness side connector to the light control and dimmer switch and inspect the connector from the back side. For the front side of the combination switch connector, see CONNECTOR IDENTIFICATION . See INSPECTING LIGHT CONTROL SWITCH CIRCUIT (CONNECTED) table. If the circuit is not as specified, inspect the wire harness. See WIRING DIAGRAMS .INSPECTING LIGHT CONTROL SWITCH CIRCUIT (CONNECTED)
Tester Connection Condition Specified Condition 13 - Ground Light Control Switch OFF, TAIL Or HEAD No Voltage 13 - Ground Light Control Switch AUTO B+ Voltage 14 - Ground Light Control Switch OFF Or TAIL No Voltage 14 - Ground Light Control Switch HEAD B+ Voltage 15 - Ground Light Control Switch OFF No Voltage 15 - Ground Light Control Switch TAIL Or HEAD B+ Voltage
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.