RAM Promaster 2021 — technical service bulletin
Bulletin 9004474 · NHTSA communication 10222886 · issued Jan 27, 2022
Technical service bulletin
communication type
Structure
component
2021
model years
1
vehicle entries
Official summary
MODULE, Body Controller (BCM) Do not replace the BCM for a lighting issue on Amazon vehicles. Please remove the D-Pillar cover and inspect the wiring for the left rear tail light. There is known issue with a Utilmaster installed jumper harness that makes the Left Rear Tail Lamp inoperative. Unplug jumper and reinstall the factory connector to the Tail Lamp to verify normal operation. For a replacement jumper please contact Ultimaster at 800-237-7806.
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.