JT93es300

Hi all, I recently picked up a 1993 es300. The car runs great, looks great and feels great. I love it. However, the keyless entry system is giving me trouble. After a series of trial and error scenarios, I've come to find out that the remote entry works fine, its the key that is draining the battery (the small 1216) almost immediately after installing it. Has anyone ever heard of this?