1. Connect the connector to the running light unit.
2. Connect the negative battery cable.
3. Measure the voltage at the running light unit using voltmeter.
4. If the value are not as specified in the Terminal Voltage List (Reference), inspect the parts under Action and related wiring harnesses.
5. If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the running light unit.
Terminal Voltage List (Reference)



Running light unit removal/installationMazda 6 Service Manual: Rear seat removal/installation
4SD
1. Remove in the order indicated in the table.
2. Install in the reverse order of removal.
5HB
1. Remove in the order indicated in the table.
2. Install in the reverse order of removal.
Remote wire removal note
1. Turn over the trunk floor mat.
2. Remove the case.
3. Remove the ...
Mazda 6 Service Manual: Discharge headlight control unit removal/installation
Caution
Incorrect servicing of the discharge headlight control unit could
result in electrical shock. Before servicing the discharge headlight control
unit, always refer to the Discharge headlight service warnings. (See
DISCHARGE HEADLIGHT SERVICE WARNINGS)
When replacing the discharg ...