yes u can but u will need to install door lock actuators in the door and have a relay to power it in the lock and unlock position
On your keyless remote.On your keyless remote.
It may be something as simple as the linkage coming disconnected. Have a look at this thread: http://www.mazda3club.com/showthread.php?t=43059
Unlocks Emo Crys: Up (+Control Pad), Up (+Control Pad), Left (+Control Pad), Left (+Control Pad), Down (+Control Pad), Down (+Control Pad), Right (+Control Pad), Right Unlocks Jay Jay: L Button, R Button, A Button, Left (+Control Pad), Right (+Control Pad), Y Button, R Button, L Button Unlocks Lil' Rob: L Button, Left (+Control Pad), Y Button, R Button, Right (+Control Pad), A Button, Up (+Control Pad), X Button Unlocks Spitbal: Up (+Control Pad), Up (+Control Pad), Down (+Control Pad), Down (+Control Pad), L Button, R Button, L Button, R Button Unlocks Jack Knife: X Button, A Button, X Button, Y Button, Up (+Control Pad), Left (+Control Pad), Down (+Control Pad), Right (+Control Pad) From wwwgamefaqcom
Keyless entry is an option and may have not been installed.
On the inside of the keyless entry remote or sometimes on the back it explains how to do this. I believe you hold the unlock button along with the lock button for 7 seconds near the car. It will explain it on the inside of the keyless entry remote.
No.
No. A 1996 Plymouth does not have a reset switch.
Press the button on your keyfob
Electric trunk release mechanism my be worn out--check to see if you are getting power to same--if so it needs replacement
keyless systems don't require you to put the key in the ignition, you can leave it in your pocket and hit the start button
If a vehicle has keyless entry, it is equipped with a key fob to click a button to enter the vehicle. This fob can also be used to lock the vehicle.
Turn the ignition from OFF to RUN 8 times within 10 seconds, ending with run on the 8th time. Within 20 seconds press any button on a working keyless remote. Within 20 seconds, press any button on new keyless remote.