# Service bulletin 08\-029\-21

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: 10190686
- Published by NHTSA: 2021\-04\-26
- Manufacturer's number: 08\-029\-21
- Manufacturer's date: 2021\-03\-04
- NHTSA component: VISIBILITY

## NHTSA's summary

Door Control Module Window Inoperative This bulletin involves replacing one or both of the door modules. Technician may find that one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set:B18BA\-12 \- Window Control \- Circuit Short to Battery B18BA\-13 \- Window Control \- Circuit Open In addition the customer may notice one or more of the following:Driver and/or passenger windows stop working. If the window switch is held in the up position for at least two seconds,the obstruction auto\-down function may not work. Windows may go up slower than expected.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190686-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190686-9999.pdf)

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

## Components

Glass, wipers and mirrors

## Trouble codes named

B18BA

## Vehicles listed

- 2020 RAM 2500
- 2020 RAM 3500
- 2020 RAM 4500

## Recalls for the same vehicles and component

- [2022025](/recalls/tc/2022025.md), 2022-01-27: Visual System
- [22V035000](/recalls/nhtsa/22V035000.md), 2022-01-27: VISIBILITY:WINDSHIELD WIPER/WASHER:LINKAGES
- [2020472](/recalls/tc/2020472.md), 2020-10-08: Visual System
- [20V622000](/recalls/nhtsa/20V622000.md), 2020-10-08: VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR
- [2020145](/recalls/tc/2020145.md), 2020-04-06: Visual System

## Other bulletins for the same vehicles and component

- [96076](/bulletins/11002753.md), 2024-07-02, Other: VISIBILITY/WIPER. MOTOR \- WINDSHIELD WIPER \& WIPERUNIT \- WINDSHIELD WIPER
- [94006](/bulletins/11002424.md), 2024-06-27, Other: VISIBILITY/WIPER. WIPERUNIT \- WINDSHIELD WIPER, BLADE \- FRONT WIPER
- [98927](/bulletins/11002316.md), 2024-06-26, Other: VISIBILITY/WIPER. MOTOR \- WINDSHIELD WIPER \& WIPERUNIT \- WINDSHIELD WIPER
- [2308023](/bulletins/10241129.md), 2023-08-21, Service bulletin: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Intermittently Poor HVAC Performance Customers may comment on the following: ? Intermittently the HVAC blow feel/output maybe reduced. This issue only happens in temperature that are just below freezing and snowing. This bulletin involves removing the right side rubber flaps from the cowl baffles.
- [9100142](/bulletins/10236969.md), 2023-05-30, Service bulletin: VISIBILITY:REARVIEW MIRRORS/DEVICES. Mirror
- [S1623000028 Rev.](/bulletins/10231735.md), 2023-02-13, Service bulletin: VEHICLE SPEED CONTROL; BACK OVER PREVENTION; POWER TRAIN; VISIBILITY; PARKING BRAKE. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
- [S1723000001](/bulletins/10230189.md), 2023-01-17, Service bulletin: VISIBILITY. Left Hand Drivers Side Mirror Takes Longer to Defrost Or Clear Than Right Side Passenger
- [0807221](/bulletins/10230091.md), 2023-01-17, Service bulletin: VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. Flash: Driver Door Module \(DDM\) and Passenger Door Module \(PDM\) Updates This bulletin involves reprogramming the DDM and PDM with the latest available software. This software is for vehicles on the RRT VIN List is to improve the function and reliability of the power windows operation.
- [S2223000063](/bulletins/10229512.md), 2023-01-09, Service bulletin: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Ambient Temperature Sensor Servicing.
- [0807220](/bulletins/10229348.md), 2023-01-09, Service bulletin: PARKING BRAKE; VISIBILITY:WINDSHIELD WIPER/WASHER; VISIBILITY. Loose Wiper Arms This bulletin involves checking and or re\-torquing the windshield wiper arm nuts. The customer may describe one or both of the windshield wiper arm are loose and may stop moving at times.

JSON: [/v1/bulletins/10190686](/v1/bulletins/10190686)

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