# Service bulletin 54\-278

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: 10076455
- Published by NHTSA: 2016\-07\-14
- Manufacturer's number: 54\-278
- Manufacturer's date: 2015\-07\-01
- NHTSA component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY

## NHTSA's summary

Powernet Troubleshooting Guide: Batteries, Path, Alternator, and Starter For all battery, charging, or starting issues: 1. Print out the "Powernet Assessment Worksheet," found at the end of this bulletin. 2. Use the "Powernet Assessment Detail Section" to understand and master the worksheet. The detail section, starting on page 2, breaks the worksheet down step by step. 3. Perform each line of the worksheet in order, recording the initial value of each check before performing repairs. Repair issues as they are found, then recheck. Complete the entire worksheet even if the original issue seems to be resolved. 4. Once all the checks in the "Powernet Assessment Worksheet" have been completed, if a starting issue persists, use the "Troubleshooting the Starting System" section near the end of this bulletin.

## 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

Electrical system, 12\-volt battery

## Vehicles listed

- FREIGHTLINER FREIGHTLINER

JSON: [/v1/bulletins/10076455](/v1/bulletins/10076455)

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