OPERATOR'S MANUAL
Table Of Contents
- How to Use This Manual
- Safety Signals
- Vehicle Safety
- How to Find What You Want
- A Special Word About Repairs
- Shop Manuals
- Preventive Maintenance Section
- Additional Sources of Information
- Start–Up
- Instruments and Controls
- Introduction
- Warning Lights and Buzzer
- Self Test
- Speedometer and Odometer
- Tachometer
- Coolant (Water) Temperature Gauge
- Engine Oil Pressure Gauge
- Dual Air Pressure Gauge (Air Reservoir)
- Fuel Gauge
- Voltmeter (option)
- Transmission Temperature Gauge (option)
- Air Filter Restriction Indicator (option)
- Headlight Switch
- Daytime Running Lights (option)
- Panel Lights
- ID and Clearance Lights
- Windshield Wipers/Washer
- Ignition Key Switch
- Parking Brake
- Cruise Control Switch
- Hand Throttle Control
- Heating and Air Conditioning
- Accessories
- Seats
- Steering Column and Mirrors
- Operating the Engine
- Operating the Transmission
- Using the Brake System
- Operating the Rear/Drive Axle
- More Driving Tips and Techniques
- Vehicle Recovery and Spring Brakes
- Shut–Down
- Introduction
- Maintenance Schedule and Lubrication
- Engine Maintenance
- Cooling System
- Brake System
- Air System
- Tires and Wheels
- Heater and Air Conditioner
- Electrical System
- Cab Maintenance
- Transmission and Clutch
- Steering and Driveline
- Front Axle and Suspension
- Rear Axle and Suspension
- Frame and Fifth Wheel
- Noise and Emission Control
- Consumer Information and Vehicle Identification
Preventive Maintenance Electrical System
Model 330 PB1318 3/01
– 185 –
ELECTRICAL SYSTEM
Location Of Fuses
Fuses are located inside the cab, left side, next to the driver’s
door.
Fuse Replacement
CAUTION: Before replacing a fuse, turn OFF all
lights and accessories and remove the ignition
key to avoid damaging the electrical system.
• Be sure to replace a blown fuse with a fuse of the correct
rating.
• If a fuse blows repeatedly, do not keep on replacing it.
The cause of the short circuit or overload must be found
and eliminated.
CAUTION: Never patch fuses with tin foil or wire.
This may cause serious damage elsewhere in
the electrical circuit, and it may cause a fire.
See the Medium Duty Maintenance Manual for instructions
on fuse replacement.
Adding Electrical Options
Spare circuits are located throughout the wiring for the dash.
For proper electrical system performance, refer to a wiring
diagram for your chassis before adding electrical options.
Truck-Body Connection
Your vehicle includes a junction box mounted to the frame for
wiring the vehicle body to the main chassis harness.
Refer to the Body Builder's Manual for further information on
using the Truck and Body Connection.
Batteries
WARNING! Battery posts, terminals, and related
accessories contain lead and lead compounds,
chemicals known to the State of California to
cause cancer and reproductive harm. Wash
hands after handling.