Fuse Or Relay Blows - Peterbilt 579 Operator's Manual [Page 54] (2024)

WHAT TO DO IF...

3 to 5 minutes before shutting it

off. This allows the engine to cool

gradually and uniformly.

7. If overheating came from

2

severe operating conditions, the

temperature should have cooled

by this time. If it has not, stop

the engine and let it cool before

checking to see if the coolant is

low.

For further information on engine

temperature and operating engines

properly, see the Engine Operation

and Maintenance Manual and Starting

and Operating the Vehicle on page

4-5. Check the coolant level after

each trip when the engine has cooled.

The coolant level should be visible

within the surge tank—add coolant if

necessary. See Topping Off in Engine

Cooling System on page 5-71, for

instructions on checking and filling the

coolant expansion tank.

2-6

WARNING!

To reduce the chance of death, per-

sonal injury and/or vehicle damage

from overheated engines, which can

result in a fire, never leave the engine

idling without an alert driver present.

If the engine should overheat, as indi-

cated by the engine coolant tempera-

ture light, immediate action is required

to correct the condition.

Continued

unattended operation of the engine,

even for a short time, may result in

serious engine damage or a fire.

WARNING!

Do not remove the radiator fill cap

while the engine is hot.

steam and fluid under pressure may

escape. You could be badly burned.

Failure to comply may result in death

or personal injury.

Y53-6047–2C

Fuse or Relay Blows

Fuses are located behind the drivers

side kick panel, below the ignition

switch, and accessible by a door panel.

See Power Distribution Box on page

5-83.

The vehicle main power relays are

located in the engine compartment.

See Power Distribution Center (PDC)

on page 5-80.

WARNING!

Do not replace a fuse with a fuse of a

higher rating. Doing so may damage

the electrical system and cause a fire.

Failure to comply may result in death,

Scalding

personal injury, equipment or property

damage.

(04/13)