# Service bulletin 08\-146\-26

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: 11031323
- Published by NHTSA: 2026\-04\-15
- Manufacturer's number: 08\-146\-26
- Manufacturer's date: 2026\-04\-09
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

R1H Radio USB Update to U39P.2 Customers may experience one or more of the following: SYMPTOM: ? Navigation highly inaccurate. ? Compass intermittently shows "\-\-" in cluster. ? Navigation stuck at the same location. ? Screen OFF hard key inoperative. This

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031323-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031323-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2026 RAM 1500

## Recalls for the same vehicles and component

- [26V225000](/recalls/nhtsa/26V225000.md), 2026-04-09: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [2026043](/recalls/tc/2026043.md), 2026-02-02: Electrical
- [26V059000](/recalls/nhtsa/26V059000.md), 2026-02-02: ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; EXTERIOR LIGHTING:TURN SIGNAL; EXTERIOR LIGHTING:BRAKE LIGHTS
- [25V826000](/recalls/nhtsa/25V826000.md), 2025-12-01: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

## Other bulletins for the same vehicles and component

- [08\-149\-26 REV. B](/bulletins/11038543.md), 2026-10-16, Service bulletin: STEERING; ELECTRICAL SYSTEM. Flash: Electric Power Steering \(EPS\) Module Updates Customers may experience the following: SYMPTOM: ● Battery drain due to the EPS system staying active after ignition off. This bulletin involves inspecting and possibly reprogramming the EPS module with the latest available software.
- [08\-139\-26 REV. B](/bulletins/11038542.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. Flash: Radio Frequency Hub Module \(RFHM\) Updates Customer may experience the following: SYMPTOM: ● Excessive Ignition Off Draw \(IOD\) on 12v vehicle battery if keys are left within proximity range. This bulletin involves inspecting and possibly reprogramming the RFHM module with the latest available software
- [08\-372\-26](/bulletins/11038530.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. R1H U43.17 Software Update \- FOTA Customers may experience one or more of the following: SYMPTOM: ● Screen Freeze or Radio Reset. ● Projection will not reconnect. ● Audio or music skipping and/or cutting out during playback. ● Apple CarPlay®/Android Auto® improvements: fixes for disconnections, freezes, screen distortion, and pairing issues. ● "Service Air Suspension System" message displayed when the Up or Down button becomes stuck. ● Trailer Surround Camera dimensions not retained after an ignition cycle. ● Distorted radio startup animation. ● Home screen media widget does not display the artist name. ● Turn signal blind spot view does not turn off after the turn is completed. ● Vehicle Settings page becomes frozen and unresponsive to touch input. ● "AUTO" Drive Mode takes several seconds to update after the mode is changed. ● Screen display size changes from normal to small without user input. ● Radio text displays in English when Portuguese is selected. ● Screen flickers, resets, or goes blank while driving. ● Steering wheel volume adjustment causes screen distortion. ● Surround Camera View guidelines remain visible when the setting is turned off in the radio. ● User is able to add a device to the head unit while the vehicle is in motion. ● Radio Bluetooth is unable to discover a phone even when the phone is directly in front of the radio. ● App screen turns completely black while driving. ● Phantom chimes occur without any warning messages or notifications. ● Left\-side blind spot turn signal camera has a longer activation delay than the right\-side camera. ● Radio switches to Android Auto® unexpectedly and displays a black screen. ● Phone cannot be reconnected to Bluetooth after being deleted. ● Glovebox and Apps text overlap on the MyCar or Performance Pages screen when the glovebox button is pressed. In addition, the following software enhancement is included: ● Remove Virtual Wall option from the Vehicle Settings menu.
- [08\-149\-26 REV. B](/bulletins/11038506.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM; STEERING. Flash: Electric Power Steering \(EPS\) Module Updates Customers may experience the following: SYMPTOM: ● Battery drain due to the EPS system staying active after ignition off. This bulletin involves inspecting and possibly reprogramming the EPS module with the latest available software.
- [08\-139\-26 REV. B](/bulletins/11038505.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. Flash: Radio Frequency Hub Module \(RFHM\) Updates Customer may experience the following: SYMPTOM: ● Excessive Ignition Off Draw \(IOD\) on 12v vehicle battery if keys are left within proximity range. This bulletin involves inspecting and possibly reprogramming the RFHM module with the latest available software
- [08\-372\-26](/bulletins/11038493.md), 2026-10-16, Service bulletin: ELECTRICAL SYSTEM. R1H U43.17 Software Update \- FOTA Customers may experience one or more of the following: SYMPTOM: ● Screen Freeze or Radio Reset. ● Projection will not reconnect. ● Audio or music skipping and/or cutting out during playback. ● Apple CarPlay®/Android Auto® improvements: fixes for disconnections, freezes, screen distortion, and pairing issues. ● "Service Air Suspension System" message displayed when the Up or Down button becomes stuck. ● Trailer Surround Camera dimensions not retained after an ignition cycle. ● Distorted radio startup animation. ● Home screen media widget does not display the artist name. ● Turn signal blind spot view does not turn off after the turn is completed. ● Vehicle Settings page becomes frozen and unresponsive to touch input. ● "AUTO" Drive Mode takes several seconds to update after the mode is changed. ● Screen display size changes from normal to small without user input. ● Radio text displays in English when Portuguese is selected. ● Screen flickers, resets, or goes blank while driving. ● Steering wheel volume adjustment causes screen distortion. ● Surround Camera View guidelines remain visible when the setting is turned off in the radio. ● User is able to add a device to the head unit while the vehicle is in motion. ● Radio Bluetooth is unable to discover a phone even when the phone is directly in front of the radio. ● App screen turns completely black while driving. ● Phantom chimes occur without any warning messages or notifications. ● Left\-side blind spot turn signal camera has a longer activation delay than the right\-side camera. ● Radio switches to Android Auto® unexpectedly and displays a black screen. ● Phone cannot be reconnected to Bluetooth after being deleted. ● Glovebox and Apps text overlap on the MyCar or Performance Pages screen when the glovebox button is pressed. In addition, the following software enhancement is included: ● Remove Virtual Wall option from the Vehicle Settings menu.
- [9100926](/bulletins/11038319.md), 2026-10-07, Service bulletin: ELECTRICAL SYSTEM. WIRELESS CHARGER Welcome GREEN LED not turning ON after multiple IGN ON/OFF without sleep cycle and no phone on the charging pads. Part numbers affected: 68630089AA 68630088AB 68649038AA Welcome Green LED turns on for 1 second after multiple IGN ON/OFF without sleep cycle and no phone on the charging pad. Intent of this condition is to notify the customer/dealership that the Wireless Charging Pad is ready to charge. Do not report as warranty claim, no impact to wireless charger functionality. Part numbers affected: 68630089AB 68630088AD 68649038AB Advice to dealership: Do no replace wireless charger PNs 68630089AA,68630088AB,68649038AA if no Welcome GREEN LED is seen after multiple IGN ON/OFF without sleep cycle and no phone on the charging pads. This feature is available in the successor NIKs, no impact to wireless charger functionality.
- [23\-048\-26 REV. A](/bulletins/11038315.md), 2026-10-07, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. Multi\-function Tailgate Requires High Closing Effort Customers may comment on the following: SYMPTOM: ● Difficulty closing the right\-hand Multi\-Function Tailgate due to high closing effort. This bulletin involves inspecting and possibly adjusting the Multi\-Function tailgate.
- [OTHERDOC\_175](/bulletins/11037366.md), 2026-09-17, Other: ELECTRICAL SYSTEM. Radio Over The Air Update to U43.17 R1H Software Version \(FOTA\) Customers may experience one or more of the following:\- Navigation Stability \- Android Auto \& Carplay stability \& connectivity\- Air suspension\- Trailer Tow pages\- Power management app\- Distorted/glitchy display prior to start‑up animation\- Text appearance display\- Widget incorrect display\- Turn signal blind spot response timing\- Audio cut out \- Drive Modes selection\- Park assist Guidelines selctio
- [08\-328\-26 REV. A](/bulletins/11037279.md), 2026-09-10, Service bulletin: ELECTRICAL SYSTEM. Wrong Instrument Panel Cluster \(IPC\) Configuration Customers may comment on one or more the following: ● Oil pressure gauge and battery life gauges are blank or missing from the IPC Fig. 1. ● The Trailer Brake radial slider movement will not move past one bar and is inaccurate Fig. 2. NOTE: The Trailer Brake percentage does display correctly. This bulletin supersedes Technical Service Bulletin \(TSB\) 08\-328\-26, date of issue September 03, 2026,which should be removed from your files. All revisions are highlighted with \*\*asterisks\*\* and includean updated LOP. This Technical Service Bulletin \(TSB\) has also been released as a Rapid Service Update \(RSU\) 26\-164, date of issue September 03, 2026. All applicable RSU VINs have been loaded. To verify this RSU service action is applicable to the vehicle, use VIP or perform a VIN search in DealerCONNECT/ServiceLibrary. All repairs are reimbursable within the provisions of warranty.

JSON: [/v1/bulletins/11031323](/v1/bulletins/11031323)

[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%2008-146-26&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11031323&vehicle=Service%20bulletin%2008-146-26)