Does Computer Need To Be Flashed When Installing Brake Controller On 2021 F150?

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asked by: Gary H

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Expert Reply:

The OEM brake controller requires your 2021 Ford F-150 to be flashed by the dealer. However, an aftermarket brake controller like the Curt Assure Trailer Brake Controller - # C49UR does not require the dealer to flash your truck's computer. You will need Plug-In Wiring Adapter # C51436 to connect the brake controller to the factory plug-in on your truck.

Keep in mind, not all 2021 models have the necessary 12V going to the plug-in, so you may end up needing to install Power Wire Kit for Electric Trailer Brake Controllers - 12 Gauge # BRK-ELECKIT to get the necessary power.

expert reply by: Andrew N

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Answer 1

The best tried and true electric trailer brake controller for a 2021 Ford F-150 is the Tekonsha Prodigy P3 Trailer Brake Controller part #90195. The P3 has storable settings for multiple trailers, and easy to read LCD display, and integrated…

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Answer 2

The brake controller port on a 2021 Ford F-150 (if equipped) will be located behind the coin tray in the center console. This will be accessed by removing the panel under the steering wheel. I have attached a video which shows this below. For a…

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Answer 3

I recommend the Tekonsha Prodigy P3 Trailer Brake Controller for your 2022 Ford F-150. This brake controller is proportional so once you have it adjusted to your trailer it will automatically adjust braking output for light and severe braking…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 6

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 7

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 8

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same…

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Answer 9

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 10

Your math is correct in your trailer weight load example. If a fully-loaded tandem axle trailer weighs 4000-lbs then each of the 4 tires will bear 1/4th of that load, or 1000-lbs. In this case a tire rated for 1300-lbs would provide a good safety…

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Answer 11

The three most common lug stud sizes for a trailer are 1/2"-20, 9/16"-18, and 5/8"-18. In order to make sure you get the correct lug nuts you need to measure the lug studs on the trailer now as we have no way to look this up for…

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Answer 12

The two sizes you mentioned are pretty similar and fit many of the same 15 inch wheels. The 205/75-15 fits rim widths of 5 inch to 6-1/2 inch whereas the 225/75-15 fits widths that are 5 inch to 6 inch. The 205 is 27.1 inches tall and the 225 is 28.4…

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Does Computer Need To Be Flashed When Installing Brake Controller On 2021 F150?

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