2021-2026 Ford Bronco Auto Start Stop Eliminator | Switch Memory Harness

This switch memory harness is for the 2021–2026 Ford Bronco. It stores the last stop-start setting you chose, so if you turned Auto Start-Stop off on one drive, it stays off the next time you start the engine. It plugs in between the stop-start switch and its factory connector, so the button keeps working as before.

You can still use the original button at any time. Whatever you select last is what the module repeats on the next start. Take the module out and the vehicle behaves exactly as it did from the factory.

Vehicles and years covered

Listed applications (each row is a 100% fitment match for the factory connector this part uses):

• Ford Bronco: 2021–2026

The listing is written around the sixth-generation (2021-up) Bronco. Trim levels are not split out in the table, so confirm that your vehicle has the stop-start button before ordering.

How Auto Start-Stop behaves from the factory

Each start of the Ford Bronco begins with Auto Start-Stop enabled. The switch on the dash can disable it, but only until the key is cycled. This module records the switch position and repeats it after the restart, which is the entire job it does.

If stop-start is not engaging

Even with Auto Start-Stop enabled, the engine control logic only stops the engine when conditions allow it. Typical blockers are a low battery state of charge, an engine that has not reached operating temperature, heavy heating or A/C demand, steering input, an open door or unlatched seatbelt, and some drive modes. If the system never seems to stop the engine, one of these is usually the reason, and the module does not change that logic.

A note on the battery

If the stop-start indicator shows the system as unavailable, test the battery before anything else. On stop-start vehicles that is the most common cause. A replacement should match the original specification (AGM or EFB), and some manufacturers call for a battery monitor reset after the swap.

What the module does and does not do

• Stores the stop-start choice you made last and repeats it at the next start.
• Fully reversible: unplug it and the vehicle returns to factory behavior.
• No tune, no reflash, no change to horsepower or shift points.
• Keeps the original switch fully functional.

If something does not look right

If the setting is not remembered, check that the module was installed with the ignition off and that the connector clicked into place. Then press the factory button once, switch the vehicle off, close the doors, give the electronics time to shut down, and start again. If it still resets, contact support with the year, trim and a photo of the connector.

Installing the switch memory harness

It plugs in between the stop-start switch and its factory connector, so the button keeps working as before. Disconnect nothing else and splice nothing. Once both plugs are locked, tuck the harness where it will not be pinched when the panel goes back on. Test by switching Auto Start-Stop off, cycling the ignition and checking the indicator.

Where owners notice the difference

Some owners only want stop-start off in certain seasons or on certain trips, such as towing a trailer or crawling through summer traffic with the A/C working hard. Because the module remembers whatever you chose last, it works both ways: leave the system off for a week, then switch it back on with the factory button and it stays on.

Quick fitment check

• Model year and model match a row in the table above (2021–2026 Ford Bronco).
• Your Ford Bronco has the factory stop-start button. Base trims or engines without stop-start have nothing for the module to remember.
• The battery and charging system test good and no warning lights are on.
• No aftermarket remote start, alarm or gateway bypass is wired into the same circuit. If one is, email support before ordering.
• The connector at your install point matches the one in the product photos.
• If you are unsure, send your VIN to support@automotivebypass.com and we will confirm fitment.

Shipping and support

Standard shipping inside the lower 48 states costs nothing; allow 1–2 business days of handling plus 3–4 in transit. Returns need approval first and must be requested within 45 days. Approved returns are subject to a 20% restocking fee, with return shipping paid by the customer. A 3-year limited warranty applies. Email support@automotivebypass.com (Mon–Fri, 9–5 PST) with your VIN if you want a fitment check.