Looking for how to reset door entry code 2010 mercury mountaineer

try the procedure for the Mountaineer.

https://itstillruns.com/reset-antitheft-system-mercury-mountaineer-5839457.html

More here

https://www.google.com/search?q=2006+mercury+mariner+security+reset

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On Ford Explorers and Mercury Mountaineers from 2006 until the model year 2010, the default five-digit keypad code is printed on the smart junction box (SJB) under the driver's side of the dash.

https://www.yourmechanic.com/article/how-to-find-the-keyless-entry-code-on-ford-explorer-and-mercury-mountaineer

You cannot reset the keyless entry on any ford product. You can add additional keyless entry 5 digit codes but only if you know the original code. A dealer can retrieve the original code as along as you can prove you own the vehicle. some charge for this service.

Try resetting the alarm, using the instructions given at the link below. I'll also copy the text here.

1. Insert the ignition/door key in the door lock on the driver's- side door of your Mountaineer.
2. Turn the key to the lock position.
3. Turn your key to the unlock position.
4. Turn your key to the lock position.
5. Turn your key to the unlock position. Your alarm is now disabled. If your key fob works, you can also press the unlock or alarm-disable button on the fob.
6. Start the Mountaineer's engine and allow the vehicle to run for at least 10 minutes. This will allow the alarm to relearn the default settings. You must make sure that you have disabled the alarm first, however, before you attempt to start the vehicle, so that the alarm will reset itself.

http://www.ehow.com/how_5978302_reset-mercury-mountaineer-alarm.html


If these instructions don't work, you can try resetting the car's computer by unplugging the battery for half an hour. However, that will reset the keyless entry code, as you can see in the fixya article I link to at the bottom

http://www.fixya.com/cars/t4755856-we_bought_it_used_and_we_dont_know_the_k

The keyless entry system can not be reset. The master keyless entry code can be retrivied from the vehicle. This can be done at the dealer.

In the 2002 Mercury Mountaineer, especially with the 3rd row seat, remove the trim panels at the rear of the back door and at the tailgate on the passenger side. You will see two panels where the wall seat belt is located, remove the top panel first and then pull the lower panel out.Then pull the lower trim panel forward CAREFULLY. Towards the front (near the door opening) you will see a small black box (says Security Unit) On it in fairly small print will be the 5 digit code.
[ONE set of FIVE numbers and that is your CODE number.]

Hi,


It seems you have problems in locating the original code to gain entry into your mercury car,however,you will find it on the back of the door lock module,in the right trunk area or below the rear passenger window.

However,If you still desire to reset the code,the only solution to this problem is that the computer will have to be reflashed by a qualified technician.


Take care..

Go to www.customersaskford.com - type in the text box - keyless entry - then press the "ask" button

The keyless entry module is located in the rear of the vehicle on the driver's side. You will need to partially remove the left rear panel in the cargo area. You will then see the keyless entry module bolted behind a metal reinforcement bar. There is a sticker on the module that has the 5 digit entry code.