FORD 2003 Explorer v.3 - Manual (Page 85)

To replace the battery:
1. Twist a thin coin between the two
halves of the remote entry
transmitter near the key ring. DO
NOT TAKE THE FRONT PART OF
THE REMOTE ENTRY
TRANSMITTER APART.
2. Remove the old battery.
3. Insert the new battery. Refer to
the diagram inside the remote entry
transmitter for the correct orientation of the battery.
4. Snap the two halves back together.
Note: Replacement of the battery will not cause the remote transmitter
to become deprogrammed from your vehicle. The remote transmitter
should operate normally after battery replacement.
Replacing lost remote entry transmitters
If you would like to have your remote entry transmitter reprogrammed
because you lost one, or would like to buy additional remote entry
transmitters, you can either reprogram them yourself, or take all
remote entry transmitters to your authorized dealer for
reprogramming.
How to reprogram your remote entry transmitters
You must have all remote entry transmitters (maximum of four)
available before beginning this procedure.
To reprogram the remote entry
transmitters:
1. Ensure the vehicle is electronically unlocked.
2. Put the key in the ignition.
3. Turn the key from the 1 (LOCK) position to 3 (ON).
4
3
2
1
Locks and Security
85