# Service bulletin WSB\-13

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: 11035488
- Published by NHTSA: 2026\-08\-03
- Manufacturer's number: WSB\-13
- Manufacturer's date: 2026\-07\-14
- Campaign id or software version: WSB\-13
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

2025 and 2026 Open Trail Motorhomes need to have the 12 volt charging system upgraded in order to extend the battery life for using the motorhome while not connected to an electrical charging system \(boondocking\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035488-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035488-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2025 to 2026 TIFFIN OPEN TRAIL

JSON: [/v1/bulletins/11035488](/v1/bulletins/11035488)

[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%20WSB-13&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11035488&vehicle=Service%20bulletin%20WSB-13)