LED Illumination Inspection

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
Remove the door lock switch. (See DOOR LOCK SWITCH REMOVAL/INSTALLATION (US) .)
Apply battery positive voltage to cluster switch terminal A, and connect terminal B to ground.

Courtesy of MAZDA MOTORS CORP.
Verify that the LED is turned on.
- If the LED does not turn on, replace the door lock switch. (See DOOR LOCK SWITCH REMOVAL/INSTALLATION (US) .)