Navistar WorkStar Series, Operator'S Manual

Page: 191 / 258

Maintenance Instructions
Connectors that are more subject to corrosion may be
disassembled and sprayed internally with a light coating of
dielectric grease. Use grease sparingly, as too much grease will
not allow air to escape from the connection and this compressed
air will push out the seals in the electrical connectors.
Accessory Feed Connections
WARNING
Electrical circuits are designed with a particular
wire gauge to meet the fuse and circuit breaker
current rating. Do not increase size of fuse or
circuit breaker or change type of breaker supplied
with your truck. To do so could cause wiring to
overheat and possibly burn, resulting in a fire
which could cause property damage, personal
injury, or death.
Vehicle electrical systems are complex and often include
electronic components, such as engine and transmission
controls, instrument panel gauge clusters, antilock brakes,
etc. While most systems still operate on battery voltage (12
volts), some systems can be as high as 90 volts or as low as 5
volts. Refer to the Electrical Circuit Diagram manuals, available
from your International dealer, to ensure that any body s and
accessories are connected to circuits that are both appropriate
and not overloaded. No modification should be made to any
vehicle control system without first contacting your International
dealer.
Fuses and Relays
Fuses and relays are located inside the cab within the fuse
panel cover.
Refer to the schematic located on the fuse
panel cover in the cab, the schematic on the fuse cover in
the luggage compartment, or the Fuse Panel Schematic
located in SECTION 7 — MAINTENANCE INTERVALS AND
SPECIFICATIONS of this manual for fuse or relay replacement.
Engine
CAUTION
To prevent damage to the Engine Control Module
it should never be spray-washed directly. Never
spray any connector.
NOTE: Information in this section pertains to MaxxForce®
engines only.
For complete operation and maintenance
information pertaining to your MaxxForce® engine, refer to
the MaxxForce® Engine Operation and Maintenance Manual
provided with the vehicle.
Information pertaining to other
engines will be found in separate manuals provided with the
vehicle.
General
For effective emission control and low operating cost, it is
important that maintenance operations be performed at the
specified periods or mileage intervals indicated (kilometers,
miles, hours, gallons of fuel, or months, whichever occurs first)
in the Engine Operation and Maintenance manual.
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