Komatsu PC290LC-6K Operation & Maintenance Manual page 92

12. OPERATION
After approx. 3 sec, the following gauges will remain on and the other
monitors will go out.
• Engine water temperature gauge
• Fuel gauge
(2) Press lamp switch
If the lamp switch do not light up, there is probably a broken bulb or
disconnection in the wiring, so contact your Komatsu distributor for
repairs.
2-48
to turn on the head lamps.