RAM 3500 2018 — technical service bulletin
Bulletin S2108000077 · NHTSA communication 10190653 · issued Mar 24, 2021
Technical service bulletin
communication type
Electrical System
component
2018
model years
1
vehicle entries
Official summary
Trailer Tow 7-way Connector, Parking Lamp And B+ Terminal No Battery Voltage
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.