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Service bulletin SB-40

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 id10057800
Published by NHTSA2015-06-29
Manufacturer's numberSB-40
Manufacturer's date2014-01-24
NHTSA componentEXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH

NHTSA's summary

TIFFIN MOTORHOMES: TSB CONTAINS NOTIFICATION OF OWNER LETTER. SELECT DOCUMENT SEARCH BUTTON BELOW. MODELS EQUIPPED WITH MOBILEYE MAY EXPERIENCE A DEFEAT SIGNAL AS SOON AS IT COMMANDS HIGH BEAMS ON AND IMMEDIATELY COMMANDS IT OFF. HEADLIGHTS WILL CONTINUE TO REPEAT CYCLE EVERY 10 SECONDS DEPENDING WHAT SYSTEM WHILE BUS IS IN MOTION. *TA

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, Headlights

Vehicles listed
TIFFIN ALLEGRO2014
TIFFIN ALLEGRO BUS2014

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