Western Star 47X 2020, Maintenance Manual

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9. Check all electrical connectors for correct fit and
that the connector locking tabs are in place and
will hold the connector firmly into the component.
Inspect connector terminals for signs of corro-
sion, thermal distortion, warping, discoloration,
high amperage heating or discoloring. If needed,
remove connectors and terminals, scrub and
clean as needed using a nylon brush. Clean de-
bris with vacuum or electrical contact cleaner
such as CRC QD® Electronic Cleaner, inspect
terminals and mating contact terminal plating. If
the terminal plating exhibits signs of unrecover-
able corrosion, the component and terminal will
need to be replaced.
10. Inspect sealed harness connectors for presence
of connector housing seals and connector pin
seals designed to keep moisture and debris from
entering the connector and component. Missing,
leaking, or damaged seals will result in moisture
and debris entering the connection and the com-
ponent and will result in component failure.
When it is determined that connector seals have
not properly prevented moisture and debris from
entering the component, the entire component
must be replaced.
11. Inspect component harnesses for secured rout-
ing that prevents excess harness movement and
prevents the harness from pulling too tight on the
connector. Inspect harnesses for signs of rubbing
or chafing that could result in wire circuit dam-
age. Damaged wiring and/or damage to harness
protective wrap must be repaired and harness
must be wrapped and secured to prevent further
damage. When possible, harness should be
routed with drip loop.
12. Inspect fuses and relays for correct fit, and that
the terminals hold the fuses and relays firmly in
place. Inspect fuses and relays for signs of cor-
rosion, thermal distortion, warping, discoloration,
and high amperage heating or discoloring. If
loose or corroded, remove, inspect, clean, and
replace as needed.
13. Connect the batteries.
Electrical, Instruments, and Controls
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