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Service bulletin 4637

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 id615175
Published by NHTSA2001-01-03
Manufacturer's number4637
Manufacturer's date1998-08-01
NHTSA componentSERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT

NHTSA's summary

ANTI-SKID BRAKE SYSTEM (ABS) LIGHT ON AND 4WABS CODES SET. *TT

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

Brakes, Anti-lock brakes

Vehicles listed
FORD F-2501999
FORD F-3501999
FORD F-450 SD1999 (the catalog's model; the bulletin names a series or trim of it)
FORD F-550 SD1999 (the catalog's model; the bulletin names a series or trim of it)

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
127762000-11-03. Service bulletin. SOME VEHICLES MAY EXHIBIT AN ANTI-LOCK BRAKE SYSTEM (ABS) INDICATOR LAMP ON WITH NO DIAGNOSTIC TROUBLE CODES (DTC) DETECTED. *TT
127502000-11-03. Service bulletin. SOME VHICLES MAY EXHIBIT AN ANTI-LOCK BRAKE SYSTEM (ABS) INDICATOR LAMP WITH NO DIAGNOSTIC TROUBLE CODES (DTC). *TT
98-47302000-11-02. Service bulletin. REPEAT MESSAGE , REVISED CONCERNING ABS LIGHT ON AND 4 WABS CODES SET. *AK
133842000-04-05. Service bulletin. EXHIBITING ABS CODES OF B2141 OR B2477 FOLLOWING REPLACEMENT OF A GEM MODULE. *TT
9961281999-09-09. Service bulletin. SUBJECT REGARDING RIGHT REAR BRAKE CONCERNS UNDER INVESTIGATION. *TT
63151999-09-02. Service bulletin. VEHICLES MAY EXHIBIT AN ANTI-LOCK BRAKE SYSTEM (ABS) INDICATOR LAMP WITH NO DIAGNOSTIC TROUBLE CODE (DTC) DETECTED. *TT
9913131999-08-26. Service bulletin. SUBJECT REGARDING ANTI-LOCK BRAKE LAMP ILLUMINATION, INCREASED BREAK PEDAL EFFORT AND / OR FALSE ANTI-LOCK BRAKE SYSTEM (ABS) CYCLING AT LOW SPEEDS. *TT
994111999-05-12. Service bulletin. VEHICLES EXPERIENCING INCREASED BRAKE PEDAL EFFORT AND / OR FALSE ABS CYCLING AT LOW SPEEDS, OR ABS LAMP ILLUMINATION. *TT