[randman1]

25 second intervals?... that sounds like the illuminated entry timer. Depending on your trim level and options, if you lift either of the front door handles, a ground signal is sent to the Remote Accessory Control (RAC) module and illuminates the interior lights as well as the little rings around the lock cylinders so you can see where to insert the key. This function is disabled when the ignition is on. I would look towards the door handles first.