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Service bulletin FDM-TSIB-024

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10194921
Published by NHTSA2021-06-03
Manufacturer's numberFDM-TSIB-024
Manufacturer's date2021-05-12
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

This bulletin provides instruction for checking electrical connections at various critical locations. Loose electrical connections can cause false readings and lead to electrical system errors.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
OSHKOSH S SERIES1978 to 1993
OSHKOSH S SERIES1997, 1998, 1999, 2000
OSHKOSH S-SERIES2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
OSHKOSH S-SERIES2013 to 2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
FDM-TSIB-0232021-06-03. Service bulletin. This bulletin provides instruction on replacing the frame ground stud nut located at the rear of the vehicle on the inside right-hand frame rail. Engineering has changed the nut from a jam nut to a lock nut after receiving reports of the jam nut being loose when inspected.