2019-2020 Ford F-150 Auto Start Stop Eliminator | Left-Side Switch Harness
Description
2019-2020 Ford F-150 Auto Start Stop Eliminator – Left-Side Switch Version
If you prefer driving your F-150 with Auto Start-Stop switched off, the factory button can become a repetitive part of every startup.
Ford explains that pressing the Auto-Start-Stop button switches the system off, but the deactivation lasts only one key cycle. Pressing the button again restores the function, and after another ignition cycle the driver may need to repeat the A-OFF selection.
The Recontrol-X Auto Start Stop Eliminator is designed to automate that preference for compatible 2019-2020 Ford F-150 vehicles while preserving use of the original factory control.
The Switch Position Is the Key Fitment Check
This is the most important difference on this product page.
Not every F-150 uses the same Auto Start-Stop switch assembly.
For this version, the correct dashboard configuration has the:
Auto Start-Stop A-OFF button positioned at the far LEFT side of the upper center switch bank.
The product's FIT image shows the A-OFF switch on the left, separated from the hazard switch located farther toward the center.
If your truck instead has:
- A-OFF positioned on the right side, or
- a split hazard / Auto Start-Stop switch assembly
this is not the correct switch-harness configuration.
This distinction is supported by established F-150-specific eliminator suppliers. Their application guides identify separate harnesses for left-side, right-side, and split hazard/Auto Start-Stop switch assemblies.
Remembers the Setting You Prefer
The module is designed to reduce the need to manually press A-OFF every time the truck is restarted.
Its purpose is to:
- Restore your preferred Auto Start-Stop setting after startup
- Reduce repeated A-OFF button presses
- Keep the factory button functional
- Avoid permanent changes to the original switch wiring
- Remain removable if the truck is returned to the original connection
This is a preference-memory solution rather than removal of the factory switch.
Compact 6.06-Inch Inline Harness
The supplied RC-ASSE-36-01 harness measures approximately:
6.06 inches / 154 mm
from end to end.
Its compact design consists of:
- Factory-style male/female connectors
- Inline control module
- Protected short harness section
- Supplied trim-removal tool
The module installs directly into the factory switch circuit.
The connection architecture is:
Vehicle Harness → Recontrol-X Module → Factory Auto Start-Stop Switch
That keeps the product hidden behind the factory switch area after installation rather than leaving an external control module visible in the cabin.
Harness Installation Instead of an OBD-II Module
This product is an inline switch harness.
It does not need to remain plugged into the diagnostic port under the dashboard.
Established F-150 eliminator suppliers similarly distinguish between two basic architectures:
Harness Type — plugs into the back of the Auto Start-Stop switch assembly.
Diagnostic Port Type — remains connected to the vehicle's OBD/data-link connector.
This product follows the switch-harness architecture.
The practical benefits are:
- OBD-II port remains free
- No device hanging from the diagnostic connector
- No cutting of factory switch wiring
- No wire splicing
- Original switch remains in place
Factory A-OFF Button Remains Available
Installing the module does not mean you lose normal use of the original Auto Start-Stop button.
If you want Auto Start-Stop active for a particular drive, the original switch remains available to change the setting.
Established F-150 harness eliminators likewise specifically retain normal start-stop button functionality.
Verified Vehicle Coverage
The supplied Recontrol-X fitment table lists only:
2019 Ford F-150
2020 Ford F-150
Trim and engine coverage are not separately provided.
Therefore the PDP should not claim:
Fits all engines
Fits all trims
Fits gas and diesel
Fits Raptor
Fits every 2015-2020 F-150
even though broader competing products may advertise those configurations.
For this SKU, the strongest verified fitment statement is:
2019-2020 Ford F-150 with the matching LEFT-SIDE factory A-OFF switch layout.
What to Check Before Ordering
Before checkout, confirm:
- Your vehicle is a 2019 or 2020 Ford F-150.
- It has the factory Auto Start-Stop system.
- The A-OFF button is positioned on the left side of the pictured upper switch bank.
- The switch panel matches the product's FIT image.
- It does not match either of the pictured NOT FIT layouts.
- The connector arrangement matches the product photos.
Do not order solely from year and model.
That sentence should be retained because the F-150 is one of the products where switch-layout verification genuinely matters.
Not Intended as a Repair Module
This module is designed for a normally functioning Auto Start-Stop system where the owner wants a different preferred startup behavior.
It is not intended to repair:
Auto Start-Stop warnings, wiring faults, damaged switches, battery problems, charging-system faults, or an existing vehicle malfunction.
Ford's manual also notes that Auto-Start-Stop operation depends on multiple operating conditions and can automatically restart or remain unavailable under certain battery, climate and vehicle conditions.
Vehicle Fitment
Additional Information
| Brand | Recontrol-X |
Reviews
S&Q
How do I know if this Auto Start Stop Eliminator fits my 2019-2020 Ford F-150?
First confirm that your truck is a listed 2019 or 2020 Ford F-150, then check the physical switch panel. This version is designed for the configuration where the factory Auto Start-Stop A-OFF button is on the LEFT side of the upper center switch bank, matching the FIT image on this page. Do not order by model year alone because F-150 trucks can use different switch assemblies.
Why are there different Auto Start Stop Eliminators for the same F-150 model years?
Ford F-150s within overlapping model years can use different Auto Start-Stop switch assemblies and connector arrangements. Established F-150 eliminator application guides distinguish between left-side Auto Start-Stop switches, right-side switches, and split hazard/Auto Start-Stop assemblies, with different harnesses required for each layout. Always match the physical switch panel before purchasing.
Where does this harness install, and will it occupy my OBD-II port?
The module installs inline behind the factory Auto Start-Stop switch assembly. Disconnect the original switch connector, insert the eliminator between the vehicle harness and the factory switch, fully seat the connectors, and reinstall the trim. Because this is a switch-harness design, it does not need to remain connected to the OBD-II diagnostic port, leaving that port available for normal diagnostic equipment.
Can I still use the factory Auto Start-Stop button after installation?
The eliminator is designed to automate restoration of your preferred setting while retaining use of the original factory button. If you want Auto Start-Stop active for a particular drive, you can still change the system state with the factory A-OFF control. Comparable F-150 harness solutions specifically retain normal start-stop button functionality.
Will this module repair an Auto Start-Stop warning or a system that is already malfunctioning?
This product is intended for a normally functioning factory Auto Start-Stop system where the driver simply wants the preferred setting restored automatically. It is not a repair for warning lights, damaged switches, wiring faults, battery problems, charging-system faults, or another existing vehicle malfunction. Ford notes that Auto-Start-Stop behavior also depends on battery, climate and other operating conditions.