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Headlamp Dimmer Switch: Testing and Inspection

PANEL LIGHT CONTROL SWITCH INSPECTION

1. Measure the voltage at each terminal (other than terminal D).
- If the voltage is not as specified in the Terminal Voltage Table (Reference), inspect the parts under "Inspection item(s)".
2. Disconnect the panel light control switch connector.

Terminal Voltage Table (Reference):




3. Verify that continuity at terminal D is as indicated in the Terminal Voltage Table (Reference).
- If there is any malfunction, inspect the parts under "Inspection item(s)".
- If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the panel light control switch.

Terminal H Inspection




1. Measure the wave pattern of panel light control switch terminals H using a tester.
2. Turn the light switch to the TNS or ON position.
3. Verify that the resistance changes smoothly while turning the panel light control switch from the brightest to the darkest setting.
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