Other information:
HomeLink® replaces up to three hand-held transmitters that operate devices
such as garage door openers, motorized gates, lighting, or home security systems.
The HomeLink® unit is powered by your vehicles 12 Volt battery.
The HomeLink® buttons that are located in the overhead console or sunvisor
designate the three different HomeLink® channels...
If you are leaving your vehicle dormant for more than 3 weeks, you may want to
take these steps to protect your battery.
Disconnect the negative cable from the battery.
Anytime you store your vehicle, or keep it out of service (e.g., vacation)
for two weeks or more, run the air conditioning system at idle for about five
minutes in the fresh air and high blower setting...