1. Visually check the bulb for blowout.
2. Check the bulb specification. 
3. If NG, replace the bulb with a new part.
1. Measure the resistance between room light switch terminals.
|
Switch position |
Terminal No. |
Standard |
|
OFF |
— |
1 MΩ or more |
|
ON |
1 and 3 |
1.5±0.5 Ω |
|
DOOR |
2 and 3 |
1.5±0.5 Ω |
2. Connect terminal No. 3 to the battery positive terminal and terminal No. 1 and No. 2 to the battery ground terminal, and check room light operation.
|
Switch position |
Light status |
|
OFF |
Light OFF |
|
ON |
Light ON |
|
DOOR |
Light ON |
3. Replace the room light if faulty.