Tectary Auto Start-Stop Eliminator for Ford F-150 2015-2020 — Plug-and-Play A-OFF Memory Harness, Water-Resistant

If your 2015–2020 Ford F-150 (including STX, XLT and select Raptor models) keeps turning the engine auto stop feature back on after every restart, this compact Tectary harness sits behind the dash and automates the A-OFF command. It’s built from heat- and water-resistant materials and uses a stable dual-core chip to hold the off-state without cutting or splicing factory wiring. The package includes a removal tool and a pre-terminated connector for a true plug-and-play install.

How does this harness keep my F-150 from reactivating start-stop?

The harness emulates the A-OFF command so the truck registers the off-state each time you power up. Once installed, the module sends the same signal the factory button would, and the truck treats it as if you pressed A-OFF manually.

• Works with Ford F-150 models 2015–2020 with A-OFF button located in the center of the panel.
• Stores the off-state so you don’t press the button every start.
• Uses a terminal dual-core chip for consistent performance.

Is installation difficult and will it change factory features?

Installation is designed to be straightforward and noninvasive: remove the trim, plug the harness into the factory connector, and reassemble. No programming, no wire cutting or splicing, and it won’t interfere with factory remote start or other OEM functions.

• Includes a trim removal tool for clean access behind the dash.
• Pre-wired connector matches original plug for true plug-and-play operation.
• No effect on remote start, vehicle electronics, or diagnostics when installed correctly.

Will this part fit my truck and how do I confirm compatibility?

The Tectary harness fits Ford F-150 versions from 2015 to 2020 where the A-OFF button is in the center of the dash panel. Fitment excludes trucks with different A-OFF button locations; checking the button position before purchase avoids incompatibility.

• Compatible: F-150 2015, 2016, 2017, 2018, 2019, 2020, including many STX and XLT trims and the 2017 Raptor where button placement matches.
• Not compatible if the A-OFF button is not centered on the panel—verify visually first.
• Consult product photos and your vehicle dash layout to confirm match prior to ordering.

What materials and safeguards does this module use?

Tectary built the eliminator with flame-retardant materials and water-resistant construction to handle the under-dash environment. The internal dual-core terminal chip improves signal stability so the module performs reliably across temperature changes and vibration.

• Heat-resistant housing suitable for dash cavity temperatures.
• Water-resistant design protects the electronics from moisture exposure.
• Durable connector and wire jacket resist abrasion and movement over time.

Who this product is for: The Tectary Auto Start Stop Eliminator is aimed at Ford F-150 owners (2015–2020) who prefer to keep the engine running during stops and want a non-destructive, reversible solution that eliminates the need to press the A-OFF button on every start. It’s ideal for DIYers and professional installers who value a quick plug-and-play install, maintain factory features like remote start, and want hardware built for the vehicle environment.