Operating The Transmitter - Cadillac 1998 Eldorado Owner's Manual

If you have trouble programming the universal
transmitter, make sure that you have followed the
directions exactly as described and that the battery in
the hand-held transmitter is not dead. If you still
cannot program it, rotate the hand-held transmitter
end over end and try again. The universal transmitter
may not work with older garage door openers that do
not meet current Federal Consumer Safety Standards.
If you cannot program the transmitter after repeated
attempts, consult your dealer.
Be sure to keep the original hand-held transmitter
in case you need to erase and reprogram the
universal transmitter.
Note to Canadian Owners: During programming, the
hand-held transmitter may stop transmitting after one or
two seconds. If you are programming from one of these
transmitters, you should press and re-press the button on
the hand-held transmitter every two seconds without
ever releasing the button on the universal transmitter.
Release both buttons when the amber light on the
universal transmitter begins to flash rapidly.
Operating the Transmitter
Press and hold the appropriate button on the universal
transmitter. The amber light comes on while the signal
is being transmitted.
Note that the universal transmitter is disabled when
the valet button inside the glove box is activated. For
more information, see "Valet Lockout Button" earlier
in this section.
Also note that if the hand-held transmitter appears to
program the universal transmitter but does not open
your garage door, and if the garage door opener was
manufactured after 1995, the garage door opener may
have a "rolling code" system. A rolling code system
changes the code of the garage door opener every time
you open or close the garage door.
To determine if you have this system, press the button
on the universal transmitter that you have programmed
already. If the amber light on the universal transmitter
flashes rapidly for one or two seconds and then stops
flashing, the garage door opener has a rolling code
system. In a rolling code system, the garage door
receiver must be trained to the universal transmitter.