freightliner M2 Plus Maintenance Manual page 162

54
discoloring. If needed, remove connectors and
terminals, scrub and clean as needed using a
nylon brush. Clean debris with a 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 unrecoverable corrosion,
replace the component and terminal.
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
component and will result in component failure.
When it is determined that connector seals have
not properly prevented moisture and debris from
entering the component, replace the component
and terminal.
11. Inspect component harnesses for secured
routing 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
damage. Damaged wiring and/or damage to
harness protective wrap must be repaired and
harnesses must be wrapped and secured to
prevent further damage. When possible, the
harnesses should be routed with a 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
corrosion, 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.
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Electrical, Instruments, and Controls
Business Class M2 Plus Maintenance Manual, 02/10/2023