1999 Toyota 4Runner Owners Manual - Page 166

4RUNNER ( ) Put the remained spacers back place. in its CAUTION To reduce the chance of injury in case of an accident or a sudden stop, always keep the garage door opener box closed while driving. When the garage door opener transmitter is properly installed, you can operate the transmitter by pushing the cover. If the spacer does not contact with your garage door opener transmitter: D Check to see if spacer is on correct pin. D Attach another spacer to the top of original spacer. Check operation. If required, continue add spacers until contact is achieved. If the transmitter is clattering during driving, fill in a piece of felt or pad to prevent the transmitter from clattering. 166