# Service bulletin SBW54\-077

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: 10181086
- Published by NHTSA: 2020\-10\-15
- Manufacturer's number: SBW54\-077
- Manufacturer's date: 2020\-10\-14
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Western Star Service Bulletin for Ordering Options for Aftermarket Power Distribution Modules \(PDMs\). For certain Western Star 4700 or 5700 vehicles, power distribution modules \(PDMs\) are typically ordered in the aftermarket by serial number and populated with fuses and circuit breakers. It may take up to three weeks for a serial number specific PDM to be processed, made, and shipped to a dealership. In order to reduce the down time of a vehicle, an alternative PDM may be ordered fully populated with fuses and circuit breakers and delivered the next day. A cost increase may be associated with this option.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10181086-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10181086-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system

## Vehicles listed

- 2020 to 2021 WESTERN STAR 4700
- 2020 to 2021 WESTERN STAR 5700

## Recalls for the same vehicles and component

- [2021172](/recalls/tc/2021172.md), 2021-03-24: Electrical
- [21V206000](/recalls/nhtsa/21V206000.md), 2021-03-24: ELECTRICAL SYSTEM:WIRING
- [2020217](/recalls/tc/2020217.md), 2020-05-18: Electrical
- [20V281000](/recalls/nhtsa/20V281000.md), 2020-05-18: ELECTRICAL SYSTEM:WIRING

## Other bulletins for the same vehicles and component

- [CXA\_10\_25\_Tech Questions](/bulletins/11024966.md), 2025-11-05, Other: ELECTRICAL SYSTEM; POWER TRAIN. CX Advocate for technical questions/issues raised
- [CALWS83\-001](/bulletins/10201680.md), 2021-09-29, Service bulletin: ELECTRICAL SYSTEM; VISIBILITY. Customer Advisory Letter for HVAC Actuator Wiring Harness. The wiring harness of the actuator of the fresh air recirculation door, shown in Fig. 1, on Western Star vehicles equipped with Red Dot HVAC systems should be inspected for signs of water intrusion and corrosion.
- [SBW54\-080](/bulletins/10198595.md), 2021-06-29, Service bulletin: ELECTRICAL SYSTEM. Western Star Service Bulletin for Key Fob ID Retention. Key fobs for remote keyless entry on Western Star vehicles are delivered in packages that include a unique ID for the fob. The ID is required when pairing the key fob with a vehicle.
- [SS708\-WST2021](/bulletins/10198288.md), 2021-06-26, Service bulletin: ELECTRICAL SYSTEM. Western Star Service Solution for Low Voltage Disconnect \(LVD\) Troubleshooting: Western Star 5700 and New 4700.
- [TechTalk566681](/bulletins/10194820.md), 2021-06-02, Service bulletin: ELECTRICAL SYSTEM. Tech Talk Discussion No comms with CPC, MCM or ACM
- [TechTalk12347K](/bulletins/10189961.md), 2021-04-06, Service bulletin: ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Tech Talk discussion on dash lights not working
- [TechTalk12331K](/bulletins/10189796.md), 2021-04-05, Service bulletin: ELECTRICAL SYSTEM. Tech Talk discussion on dash lights not working.
- [SBW54\-057](/bulletins/10189332.md), 2021-03-25, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. Western Star Service Bulletin for Powernet Troubleshooting Guide \- Batteries, Path, Alternator, and Starter. When troubleshooting powernet issues, use the BCT\-460DTNA PowerNet Assessment Tool. As of May 29, 2018, the AutoMeter is the only Daimler\-approved tool for troubleshooting vehicle Powernet issues.
- [WP21\-007](/bulletins/10189319.md), 2021-03-24, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. Warranty Policy Letter for battery tags. DTNA determined that since adopting the AutoMeter BCT\-460DTNA Powernet Assessment Tool \(AutoMeter\) as the required powernet system tester, not all battery tags have to be retained support Warranty\-related claims.
- [WI21\-006](/bulletins/10187444.md), 2021-02-26, Service bulletin: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes \- Claim Guidelines.

JSON: [/v1/bulletins/10181086](/v1/bulletins/10181086)

[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%20SBW54-077&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10181086&vehicle=Service%20bulletin%20SBW54-077)