Ford F-250 SD 2005 — technical service bulletin
Bulletin 18537 · NHTSA communication 10017877 · issued Apr 1, 2005
Technical service bulletin
communication type
Electrical System
component
2005
model years
4
vehicle entries
Official summary
The normal output voltage from the ford trailer brake controller on certain vehicles built after 3/23/05 has changed. *tt
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.