Just bought a 2002 Mountaineer w/keyless entry. The problem is no one at the dealer knows the code. How can I reset it?

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.

Not in the vehicle

It may be avail from the dealers parts dept,
if you give them your VIN #

It came with the vehicle when new,the factory code
that is,was on a white plastic card on some fords,then
you can change it ,if you have the owners manual

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.

You will have to go to the dealer with tittle,and proof
of ownership and VIN# to get the factory code.

You should have 2 keys and a valet key, then program them,
then change the Keyless Door Code

If you have the Keys to the vehicle you can get in. Giving that code out will put other vehicle at risk. If you have a manual it will have the reset code in it. Try using the manual first if that does not work go the dealership.

Stop by a dealer. Give them your Vin# and they should give you the factory code.
Then stroll into the service bay, like you own the place,get a tech off on the side, to write down, how you progam your own code,into the keyless entry pad

Take the plastic cover off of where the jack / wheel wrench is located on the rear left side. Standing in the back of the vehicle, look forward (toward the steering wheel) and you will see a computer module. The factory code is typed on that module. You might have to "carefully" pry the plastic out and do some mild acrobatics to see the code, but that is where it is. After you find the code, go to your owners manual and reset the code to your own numbers. You will have to do this every time the battery is disconnected, so you might want to just remember the factory code. Good Luck

Contact Ford dealer with vehicle serial number and registration

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.