Freightliner Cascadia 2017–2021 — technical service bulletin
Bulletin SS1034868 · NHTSA communication 10184872 · issued Dec 14, 2020
Technical service bulletin
communication type
Electrical System
component
2017–2021
model years
5
vehicle entries
Official summary
Service Solution for flickering overhead reading light during slight movement of the steering wheel for New Cascadia with DR 40SI alternators, possibly other alternators as well. The flickering overhead light is considered a nuisance, and can be simply eliminated by either adding an accessory to one of the power receptacles, or running an additional ground in one of the sleeper bunk lamps to suppress the ripples on the circuit.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.