Wjbrooks11

I have recently acquired a 310gx four door, with a bundle of issues. Most of them are simple fixes and time invested but one is really puzzling me. After Shutting the engine off the brake lights will come on for about a minute, every 10 minutes or so. I'm assuming this is just an electrical issue but I'm hoping someone can give me a tip to figure it out quickly! All help is greatly appreciated Thanks, Justin