# Service bulletin SB\-78

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: 11024935
- Published by NHTSA: 2025\-11\-05
- Manufacturer's number: SB\-78
- Manufacturer's date: 2025\-10\-24
- Campaign id or software version: SB\-78
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

It has come to Tiffin Motorhomes attention that on certain 2025 GT1 motorhomes, the Spyder control panel may not be displaying the correct battery voltage. Tiffin Motorhomes will install a new harness to allow the Spyder control panel to display correct battery voltage and clear "charge batteries" when the batteries are at 100%.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11024935-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11024935-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2025 TIFFIN GT1

JSON: [/v1/bulletins/11024935](/v1/bulletins/11024935)

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