# Service bulletin 34\-066 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: 10162392 - Published by NHTSA: 2019\-07\-08 - Manufacturer's number: 34\-066 - Manufacturer's date: 2019\-06\-10 - NHTSA component: ELECTRICAL SYSTEM ## NHTSA's summary Information Only \- Quick Reference Guide for Electric harness damage repairs. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10162392-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10162392-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system ## Vehicles listed - PACCAR PACCAR - 1975 to 1976 PETERBILT 200 - 2005 PETERBILT 201 - 2008 to 2018 PETERBILT 210 - 2015 to 2018 PETERBILT 220 - 1968 PETERBILT 282 - 1976 to 1978 PETERBILT 282H - 1989 PETERBILT 300 SERIES - 1987 to 2020 PETERBILT 320 - 2008 PETERBILT 325 - 2010 to 2011 PETERBILT 325 - 2014 to 2017 PETERBILT 325 - PETERBILT 330 - 1996 PETERBILT 330 - 1997 to 2005 PETERBILT 330 - 2007 to 2018 PETERBILT 330 - 2005 to 2011 PETERBILT 335 - 2008 PETERBILT 336 - 2008 to 2019 PETERBILT 337 - 2006 to 2011 PETERBILT 340 - 2008 to 2020 PETERBILT 348 - 1987 to 1988 PETERBILT 357 - 1994 to 2016 PETERBILT 357 - 1988 PETERBILT 362 - 1994 to 2005 PETERBILT 362 - 2004 to 2020 PETERBILT 365 - 2004 to 2020 PETERBILT 367 - 1988 to 1991 PETERBILT 372 - 1994 PETERBILT 372 - 2003 to 2004 PETERBILT 372 - 1987 to 1988 PETERBILT 375 - 1994 to 1996 PETERBILT 375 - 1999 PETERBILT 375 - 1987 PETERBILT 376 - 1988 PETERBILT 376 - 1987 to 1989 PETERBILT 377 - 1994 to 1996 PETERBILT 377 - 1997 to 2001 PETERBILT 377 - 1987 PETERBILT 378 - 1988 PETERBILT 378 - 1994 to 2016 PETERBILT 378 - 1987 to 1988 PETERBILT 379 - 1991 to 1992 PETERBILT 379 - 1994 to 2016 PETERBILT 379 - 2007 to 2008 PETERBILT 379K - 2000 PETERBILT 379XL - 2006 to 2016 PETERBILT 382 - 2007 to 2016 PETERBILT 384 - 1995 to 2016 PETERBILT 385 - 2004 to 2019 PETERBILT 386 - 1998 to 2016 PETERBILT 387 - 2004 to 2016 PETERBILT 388 - 2004 to 2019 PETERBILT 389 - 2016 PETERBILT 389G - 2008 to 2009 PETERBILT 389K - 2014 PETERBILT 389K - 2008 PETERBILT 398 - 2017 to 2020 PETERBILT 520 - 2006 to 2020 PETERBILT 567 - 2006 to 2020 PETERBILT 579 - 2006 to 2019 PETERBILT 587 - 1996 PETERBILT CITY DELIVERYS SERIES - 2001 PETERBILT CLASS 7 - 2001 PETERBILT CLASS 8 - 1993 PETERBILT CONVENTIONAL - 1995 to 1996 PETERBILT CONVENTIONAL - 1989 PETERBILT CONVENTIONAL SERIES - 1991 PETERBILT CONVENTIONAL SERIES - 1987 PETERBILT MID RANGER - 2008 to 2014 PETERBILT MODEL 220 ## Recalls for the same vehicles and component - [21V00N000](/recalls/nhtsa/21V00N000.md), 2021-12-29: ELECTRICAL SYSTEM:WIRING - [21V906000](/recalls/nhtsa/21V906000.md), 2021-11-19: ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, AIR - [2020090](/recalls/tc/2020090.md), 2020-03-05: Electrical - [20V130000](/recalls/nhtsa/20V130000.md), 2020-03-04: ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES - [18V092000](/recalls/nhtsa/18V092000.md), 2018-02-02: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION \(PRNDL\) - [2017374](/recalls/tc/2017374.md), 2017-07-27: Electrical - [17V471000](/recalls/nhtsa/17V471000.md), 2017-07-25: ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS; EXTERIOR LIGHTING - [16V426000](/recalls/nhtsa/16V426000.md), 2016-06-10: ELECTRICAL SYSTEM:IGNITION:MODULE - [15V597000](/recalls/nhtsa/15V597000.md), 2015-09-24: ELECTRICAL SYSTEM:IGNITION:MODULE; ENGINE AND ENGINE COOLING:ENGINE - [15V456000](/recalls/nhtsa/15V456000.md), 2015-07-22: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR ## Other bulletins for the same vehicles and component - [E324](/bulletins/11035148.md), 2026-07-22, Service bulletin: ELECTRICAL SYSTEM. The campaign expiration date has been changed to 03/01/2027. - [02\-177](/bulletins/11033351.md), 2026-06-03, Service bulletin: ELECTRICAL SYSTEM. Troubleshooting procedures for 2.1m cab power windows are now available. - [E326](/bulletins/11032284.md), 2026-05-06, Emissions: ENGINE; ELECTRICAL SYSTEM. EPA17\-24 MX Fuel Injector Connector \- This bulletin has been revised to include all EPA17\-24 and CARB24 PACCAR MX engines. - [E324](/bulletins/11022487.md), 2025-09-03, Service campaign: ELECTRICAL SYSTEM. "Campaign New and improved software is now required for chassis equipped with an Engine Model Year 2016 PACCAR MX\-13 engine to maintain DEF sensor performance and ensure compliance with emissions standards. - [98\-030](/bulletins/11019172.md), 2025-06-05, Service bulletin: ELECTRICAL SYSTEM. 5/29/2025: A new Ethernet Multiplexed Architecture \(EMUX\) Service Tool Kit service manual \(SM034\-022\) has been released to provide general use information. The new EMUX Service Tool Kit improves cab \& chassis electrical troubleshooting efficiency, while reducing risk of component damage. 4/29/2025: The Ethernet Multiplexed Architecture \(EMUX\) Service Tool Kit and individual kit components are now available to order. Dealers that have received their first kit may order an additional kit. The EMUX Service Tool Kit Part number has been updated to match OEM drawings \(P74\-1045\-001\). Individual kit component part numbers can be found in the Reference Bill of Materials sheet. The new EMUX Service Tool Kit improves cab \& chassis electrical troubleshooting efficiency, while reducing risk of component damage. Information Only New diagnostic tool is required to support PACCAR Ethernet Multiplexed Architecture \(EMUX\). The EMUX Service Tool Kit will help improve cab \& chassis electrical troubleshooting efficiency, while reducing the risk of component damage. - [46\-016](/bulletins/11017898.md), 2025-05-06, Service campaign: ELECTRICAL SYSTEM. 4/29/2025: Campaign A software update is available for 520EV and 579EV Battery Electric Vehicles. This software update corrects or improves certain functions. Software update procedures have been revised. Campaign start date is 12/05/2024. Campaign A software update is available for 520EV and 579EV Battery Electric Vehicles. This software update corrects or improves certain functions. Campaign start date is 12/05/2024. - [98\-030](/bulletins/11008569.md), 2024-10-05, Service campaign: ELECTRICAL SYSTEM. Information Only New diagnostic tool is required to support PACCAR Ethernet Multiplexed Architecture \(EMUX\). The EMUX Service Tool Kit will help improve cab \& chassis electrical troubleshooting efficiency, while reducing the risk of component damage. - [51\-016](/bulletins/11001048.md), 2024-06-05, Service bulletin: ELECTRICAL SYSTEM. Information Only Dealers/body builders installing lift gates onto Peterbilt Model 220EV BEV chassis must use 24\-volt lift gate systems 12\-volt lift gate systems are not compatible with vehicle electrical systems. Installation of a 12V lift gate on the 24V system could result in the following: \* Accelerated wear on the 12V batteries. \* Excessive current load on 12V system wiring. \* Lights may dim when lift gate is in operation. \* Lift gate may operate more slowly.. - [28\-001](/bulletins/10243354.md), 2023-10-03, Service bulletin: ELECTRICAL SYSTEM. For all Peterbilt chassis equipped with an air shifted PTO. Oil from the air shift cover of the PTO may leak into the air line, causing the EOA solenoid to become inoperative. - [36\-008](/bulletins/10237152.md), 2023-06-03, Service bulletin: STRUCTURE; ELECTRICAL SYSTEM. Certain 579 chassis are eligible to receive production level Digital Display software, Digital Display, Lane Keep Assist MUX switches, and Kick Panel. JSON: [/v1/bulletins/10162392](/v1/bulletins/10162392) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2034-066&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10162392&vehicle=Service%20bulletin%2034-066)