2015-2020 Ford F-150 Auto Start Stop Eliminator

This inline memory harness is for the 2015–2020 Ford F-150. 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 line with the factory connector named in the instructions. Both ends are factory-style plugs, so nothing is cut or spliced.

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.

Fitment

Every row below is listed as a 100% fitment match for this part:

• Ford F-150: 2015–2020

For reference, the Ford F-150 in these years is a full-size pickup offered with 2.7L and 3.5L EcoBoost V6 and 5.0L V8 engines, with the 3.0L Power Stroke diesel and 3.5L PowerBoost hybrid offered on selected years, most of the driving it sees is towing, job-site hauling and daily driving. The listing is written around the thirteenth-generation (2015-2020) F-150. The table does not separate trims; what matters is that the vehicle has factory stop-start and the connector shown in the photos.

Why the button resets

Auto Start-Stop is designed to default to on. The off switch (usually marked with an "A" inside a circular arrow) cancels it for the current drive. At the next start the system is armed again. That reset is intentional on the manufacturer's side, and it is the only behavior this module changes.

Battery notes for stop-start vehicles

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.

Why owners turn it off

Pressing the same button on every drive is what wears on owners. People who tow, plow, idle in pickup lines, creep through heavy traffic or simply want the engine running at a light end up making the same press dozens of times a week. On the Ford F-150, the module turns that into a one-time choice you can still change whenever you want.

Before blaming the module

If a "stop-start unavailable" or similar message appears, check the battery first. A battery that tests weak, a recent battery replacement that was not registered where the manufacturer requires it, or a fault in the battery current sensor can all disable the system. Clear up those issues before judging how the module works, because it cannot hold a setting the vehicle refuses to accept.

Connecting it

It plugs in line with the factory connector named in the instructions. Both ends are factory-style plugs, so nothing is cut or spliced. 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.

What changes after installation

• Fuel use changes only the way it would if you pressed the off button yourself.
• Comes out in the same way it went in, with nothing cut.
• Carries your stop-start choice over to the next drive.
• Does not disable warning lights or diagnostic functions.

Conditions the factory system checks

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.

Quick fitment check

• Model year and model match a row in the table above (2015–2020 Ford F-150).
• Your Ford F-150 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.
• The connector at your install point matches the one in the product photos.
• No aftermarket remote start, alarm or gateway bypass is wired into the same circuit. If one is, email support before ordering.
• If you are unsure, send your VIN to support@automotivebypass.com and we will confirm fitment.

Shipping and support

We ship free within the contiguous United States (1–2 business days to dispatch, roughly 3–4 business days in transit). If it turns out to be the wrong part, request a return authorization within 45 days; returns carry a 20% restocking fee and return postage is on the buyer. Coverage is a 3-year limited warranty. Questions go to support@automotivebypass.com, weekdays 9 a.m. to 5 p.m. PST.