Ram bulletin S1408000384
Ram filed this with NHTSA as a service bulletin dated Mar 4, 2026, received Apr 6, 2020, about the electrical system — 9 documents under this number: S1408000384 REV. J, S1408000384 REV. I, S1408000384 REV. H, S1408000384 REV. G and more. It names 68 model years (2016–2026). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communication"Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On "
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| S1408000384 REV. J | Service bulletin | Mar 4, 2026 | 11030035 | not yet checked |
| S1408000384 REV. I | Service bulletin | Feb 14, 2026 | 11028904 | not yet checked |
| S1408000384 REV. H | Service bulletin | Jan 25, 2025 | 11013171 | not yet checked |
| S1408000384 REV. G | Service bulletin | Jan 7, 2025 | 11012777 | not yet checked |
| S1408000384 REV. F | Service bulletin | Jun 25, 2024 | 11002828 | not yet checked |
| S1408000384 REV. E | Service bulletin | Jun 14, 2024 | 11002823 | not yet checked |
| S1408000384 | Service bulletin | Jan 10, 2024 | 10251783 | not yet checked |
| S1408000384 | Service bulletin | Feb 14, 2023 | 10234420 | not yet checked |
| S1408000384 | Service bulletin | Feb 22, 2020 | 10173323 | not yet checked |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themand 7 more model years on this site.
Also filed against model years this site has no page for: 2016 Ram 4500; 2017 Ram 4500; 2018 Ram 4500; 2019 Ram 4500; 2020 Ram 4500; 2021 Ram 4500; 2022 Ram 4500; 2023 Ram 4500; 2024 Ram 4500; 2026 Ram 4500; 2016 Ram 5500; 2017 Ram 5500; 2018 Ram 5500; 2019 Ram 5500; 2020 Ram 5500; 2021 Ram 5500; 2022 Ram 5500; 2023 Ram 5500; 2024 Ram 5500; 2026 Ram 5500; 2016 Ram C/V Tradesman.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ram S1408000384 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the S1408000384 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does S1408000384 cover?
The manufacturer filed it against 68 model years: 2026 Ram 1500, 2025 Ram 1500, 2024 Ram 1500, 2023 Ram 1500, 2022 Ram 1500, 2021 Ram 1500 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.