Operation - Section 32 OM3241 Page 32-22 Operator Cab and Controls Lamp Test Switch/Centry™ Diagnostic Test Switch TROLLEY INDICATOR LIGHTS This switch may be used for the lamp test, and for Cen- try™ diagnostic tests (8) on engines equipped with Cen- try™ fuel control. Refer to Figure 32-11, columns 7 and 8. Diesel Power Indicator When the truck is being operated by diesel power the diesel power indicator (A7) will light. The amber light will be off when the truck is on the trolley. The lamp test switch is provided 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 32-10) to the RUN position, and press the bottom side of the rocker switch for the CHECK position. All lamps will illuminate, except those which are for optional equipment that is not installed. The warning horn will also sound. Any lamps that do not illuminate indicate a problem in that circuit. Notify maintenance before driving the truck. Releasing the spring-loaded switch will allow the switch to return to the OFF position.
Ready For Trolley Indicator The ready for trolley indicator lamp (B7) lights when the master control lever is in one of the trol- ley speed lever selection posi- tions, but the truck has not yet automatically switched to use from the trolley line power. When the amber indicator light is on, it means that the sequence has been com- pleted for trolley operation. If the indicator does not light after the master control lever is moved to one of the truck speed positions, the sequence has not been completed and there will be no trolley opera- tion. During diesel operation (when the master con- trol lever is in the straight up position) the light will be off.
For diagnostic tests of a Komatsu engine equipped with the Centry™ fuel control, refer to Centry™ Diag- nostics at the end of this chapter. On Trolley Indicator After all conditions have been met for trolley operation, the on trolley indicator (C7) will light to indicate the truck is being pow- ered through the trolley system. The indicator is green. The trol- ley power indicator lights whenever the trolley lines are providing the power to the wheel motors.