Trunk Lid Release Switch
WARNING: This page is about a different car, the 1997 Mercury Cougar, 1997 Ford Thunderbird, and 1997 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect trunk lid release switch. Measure resistance between trunk lid release switch terminals. With switch pressed, resistance should be 5 ohms or less. With switch released, resistance should be more than 10,000 ohms. If resistance is not as specified, replace switch.