# Service bulletin SB\-56

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: 10136236
- Published by NHTSA: 2018\-05\-07
- Manufacturer's number: SB\-56
- Manufacturer's date: 2018\-01\-25
- NHTSA component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY

## NHTSA's summary

There is the possibility that the merge solenoid may not connect the chassis batteries to the house batteries when the engine is running. This would accur when the house battery voltage is too low. This could cause the house batteries not to charge while the engine is running and the house battery voltage is low. Tiffin included parts and work instructions for customer to take to our dealer or reputable service center of their choice free of charge to customer.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10136236-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10136236-0001.pdf)

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

## Components

Electrical system, 12\-volt battery

## Vehicles listed

- 2018 TIFFIN BUS
- 2018 TIFFIN PHAETON

JSON: [/v1/bulletins/10136236](/v1/bulletins/10136236)

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