# Service bulletin FDM\-TSIB\-023

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.

- Type: Service bulletin
- NHTSA id: 10194920
- Published by NHTSA: 2021\-06\-03
- Manufacturer's number: FDM\-TSIB\-023
- Manufacturer's date: 2021\-05\-04
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194920-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194920-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system

## Vehicles listed

- 1978 to 1993 OSHKOSH S SERIES
- 1997 to 2000 OSHKOSH S SERIES
- 2005 to 2012 OSHKOSH S\-SERIES
- 2013 to 2022 OSHKOSH S\-SERIES

## Other bulletins for the same vehicles and component

- [FDM\-TSIB\-024](/bulletins/10194921.md), 2021-06-03, Service bulletin: ELECTRICAL SYSTEM. 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.

JSON: [/v1/bulletins/10194920](/v1/bulletins/10194920)

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