Driver Controls and Instruments The red parking brake warning light illuminates when- ever the parking brakes are activated and the ignition is on. PUSH− MODE HOLD− RESET Whenever conditions cause the brake system warning light to come on, a warning buzzer also alerts the driver. If equipped with air brakes, the brake system warning light and buzzer activate whenever air pressure in the primary or secondary air reservoir falls below 64 to 76 psi (441 to 524 kPa). 09/25/99 f610340 Standard Indicator Lights Fig.
3.22, Mode/Reset Switch If equipped with hydraulic brakes, the warning light goes on and the buzzer sounds when the fluid level is low or when there is a fluid pressure problem within the master cylinder. Also, the buzzer will sound when the driver’s door is opened if the parking brake control lever has not been applied. Standard indicator lights include: The green right- and left-turn signal lights, which flash on and off whenever the outside turn signal lights are flashing. Optional Warning and Indicator Lights The blue high-beam indicator light, located above the speedometer and tachometer, illuminates when the headlights are on high beam.
The high coolant temperature/low oil pressure (oil can/ thermometer symbol) warning light and buzzer activate whenever the engine coolant temperature exceeds a preset point determined by the engine manufacturer. See Table 3.1 for this temperature. Standard Warning System Standard Warning Lights Standard red warning lights are for alternator no-charge (battery symbol), the parking brake ("P" symbol), and the brake system (! symbol). See Fig. 3.24 . 3.25