Try these instructions from ProgramYourRemote
for a 2000 Ram
ATTENTION: You MUST HAVE one working remote to add one more to the system. If you do not have one working remote right now then these instructions will not work. You will have to have a Locksmith or dealership use a computer to program the first remote for you.
Click here to find a Locksmith in your area to program this remote.
1. Turn ignition to run position (as far as you can go without starting engine).
2. Using any Working remote, press the UNLOCK button for 4 to 10 seconds.
3. Within the specified 4 to 10 seconds, continue pressing the UNLOCK buton and press
the PANIC button for 1 second and release both buttons at the same time. A chime will
sound within 3 seconds to indicate that the vehicle has entered remote programming
4. Within 30 seconds of the chime, press any button on all remotes to be programmed
including previously programmed remotes. A chime will sound after each remote is
5. Turn ignition to OFF and remove key.
6. Test all remotes.
Good luck and let us know if this works!