# Service bulletin S3852 202403

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: 10252313
- Published by NHTSA: 2024\-04\-02
- Manufacturer's number: S3852 202403
- Manufacturer's date: 2024\-03\-18
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Service Campaign: On certain Mack GR model trucks built between May 10, 2021, to March 28, 2023, it has been determined that the air horn and battery cable could interfere with each other causing the horn to rub through the insulation on the battery cable. To correct these findings, install a new battery cable securing bracket that improves the routing of the battery cable away from the horn.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10252313-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10252313-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2022 to 2024 MACK GRANITE \(GR\)
- 2022 to 2024 MACK GRANITE \(GU\)

## Recalls for the same vehicles and component

- [24V792000](/recalls/nhtsa/24V792000.md), 2024-10-23: ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE

## Other bulletins for the same vehicles and component

- [CBR 159 202608](/bulletins/11036580.md), 2026-09-01, Service bulletin: ELECTRICAL SYSTEM. Mack Trucks Equipped With A Cummins Engine \- Engine Preheat Icon Does Not Illuminate In The Instrument Cluster \(IC\) During Engine Pre\-heat \(Intake Air Heater\) Operation \- Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer
- [CBR 2712\-7 032026](/bulletins/11030579.md), 2026-04-02, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. CBR \- No Start Condition After Over the Air Programing.
- [CBR 2128\-7 202601](/bulletins/11028033.md), 2026-02-03, Service bulletin: ENGINE; ELECTRICAL SYSTEM. CBR \- Engine Control Module \(EMS\) Software Information \- Improvement List \(Change Log\), US21\+OBD2021 Emissions ONLY
- [CBR 2495\-4 202511](/bulletins/11026031.md), 2025-12-03, Service bulletin: ELECTRICAL SYSTEM. CBR \- Carb 24 Phase 1 \- 48V Diagnostics Guide.
- [CBR 2171\-11 202511](/bulletins/11026025.md), 2025-12-03, Service bulletin: ENGINE; ELECTRICAL SYSTEM. CBR \- Mack Temperature Sensor Troubleshooting Guide
- [CBR 2495 092025](/bulletins/11023450.md), 2025-10-01, Service bulletin: ELECTRICAL SYSTEM; ENGINE. The purpose of the 48V EATS heater system is to provide additional heat to the exhaust stream allowing the EATS to become active earlier during acold start and during engine operation that produces low exhaust gas temperatures.
- [CBR 2172\-5 082025](/bulletins/11022289.md), 2025-09-02, Service bulletin: ELECTRICAL SYSTEM. CBR \- When an OTA \(Over\-The\-Air\) job starts to program the VECU blocks the starter relay out, if the job ends in a Critical failure, the vehicle will remain in Safe State.
- [CBR 407 072025](/bulletins/11021333.md), 2025-08-04, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM. CBR \- To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
- [CBR 2488 072025](/bulletins/11021332.md), 2025-08-04, Service bulletin: ELECTRICAL SYSTEM. CBR \- A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back\-office communication but failing to transmit GPS location data.
- [CBR 901\-5 202505](/bulletins/11018811.md), 2025-06-02, Service bulletin: ELECTRICAL SYSTEM. Remote Control Central Door Lock, Programming; Key Fob Cannot Be Programmed Or Does Not Work After Programming \- Model Year 2018 And Newer

JSON: [/v1/bulletins/10252313](/v1/bulletins/10252313)

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