Post by
J-Owner »
https://forums.nicoclub.com/j-owner-u3840.html
Mon Mar 26, 2007 7:18 am
My garage door opener is about 10 years old so I had to push the button on the unit on the ceiling to reset the remote and then park close to the garage, hole down the homelink button and your remote button at the same time until the homelink blinks red quickly.
NOTE - Hold down the first and third homelink buttons simultaneous until it blinks fast to clear out any previous remotes or devices.
that should work for you.