Operation - Section 32 OM3223 Page 32-24 Operator Cab and Controls Hazard Warning Light Switch Hazard warning light switch (9, Figure 32-12) flashes all the turn signal lights. Pressing the bottom side of the rocker switch (toward the triangle) activates these lights. Press- ing the top side of the rocker switch (toward the off symbol) turns these lights off. Lamp Test Switch / Centry™ Diagnostic Test Switch Lamp test switch (10, Figure 32-12) may be used for lamp test, or for Centry™ diagnostic tests if equipped with Cen- try™ Fuel Control. The lamp test switch is pro- vided to allow the operator to test the indicator lamps prior to starting the engine.
To test the lamps, and the warning horn, turn key switch (1, Figure 32-11) to the RUN position and press the bottom side of the rocker switch for the CHECK position. All lamps will illumi- nate, except those which are for optional equipment that is not installed. The warning horn will also sound. Any lamp bulbs which do not illuminate are to be replaced before operating the truck. Releasing the spring-loaded switch will allow the switch to return to the OFF position. For diagnostic tests of a Komatsu engine equipped with Centry™ Fuel Control, refer to Centry™ Diag- nostics at the end of this section.