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Service bulletin wp54018 EPA10

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 id10158108
Published by NHTSA2019-04-08
Manufacturer's numberwp54018 EPA10
Manufacturer's date2018-11-16
NHTSA componentELECTRICAL SYSTEM:WIRING

NHTSA's summary

Technical Bulletin wp54018 EPA10 Wiring Harness Ordering

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, Wiring and fuses

Vehicles listed
WESTERN STAR 47002013
WESTERN STAR 49002014
WESTERN STAR 57002015
WESTERN STAR 69002016, 2017, 2018, 2019

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

Recalls for the same vehicles and component
21V8820002021-11-12. ELECTRICAL SYSTEM:WIRING
18V1910002018-03-26. ELECTRICAL SYSTEM:WIRING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
17TS-12REV2020-01-03. Service bulletin. Technical Service Letter for GHG17 Heavy Duty Engine Platform 1-BOX Aftertreatment System (ATS) Wire Harness experiencing chaffing caused by vibration and dirt collecting in the harness conduit.
sb540722019-08-05. Service bulletin. HDEP MCM 21 Pin Service Jumper Replacement
wp54018 EPA102019-04-01. Service bulletin. Technical Bulletin wp54018 EPA10 Wiring Harness Ordering
DOC-10333332018-10-29. Service bulletin. SS 1033333 - WST ECC Replacement Jumper Harness Installation.
503-142018-06-18. Service bulletin. 503-14 FMI 3, 4: High Side Digital Output 3 Circuit Failed High
SF5142018-02-12. Service bulletin. Western Star ABS Wiring - Export Only
14CSA222017-11-17. Service bulletin. 14CSA22 DTNA Chassis Wiring Diagrams
SB-54-582014-12-24. Service bulletin. WESTERN STAR: INSTRUCTIONS PROVIDED TO HELP REDUCE VIBRATION ON POWER DISTRIBUTION MODULES (PDM), TO PREVENT CRACKING OF FUSES ON HORIZONTALLY MOUNTED POWERTRAIN. *PE UPDATED 03/02/15*LJ