# Service bulletin 4\-EP\-13EN Rev B

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: 10154189
- Published by NHTSA: 2019\-03\-11
- Manufacturer's number: 4\-EP\-13EN Rev B
- Manufacturer's date: 2019\-02\-10
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Relates to Increased Accessory Power 1 \(IAP1\) and IAP2 systems and serviceability information

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10154189-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10154189-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- ALLISON TRANSMISSION

JSON: [/v1/bulletins/10154189](/v1/bulletins/10154189)

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