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Service bulletin 31R

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 id612062
Published by NHTSA2000-06-05
Manufacturer's number31R
Manufacturer's date2000-02-22
NHTSA componentEXTERIOR LIGHTING

NHTSA's summary

SUBJECT ON ELIMINATING BACKFEED FROM STOP ENGINE WARNING BUZZER, WITH VEHICLES THAT HAVE CUMMINS 1SB/1SC ENGINES. *MJS

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Lighting

Vehicles listed
THOMAS CL960
THOMAS ER TRANSIT
THOMAS MVP ER
THOMAS TL960

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