flashingbrake

Hi, I have a 2007 Seat Ibiza Formula Sport with flashing/pulsating brake lights. It only happens when the lights are turned on and I am not pressing down the brake pedal, however the lights stay on as they should when I press down the brake pedal. There is no pattern with the flashing, just...

hey guys car is a 05 ibiza tdi fr pd130 basically, after a search i thought it was the brake light switch (common problem on mk4 ibizas) which was causing the flashing glow plug light, but after i checked the brake lights (yes one was out but replaced that!) it was still flashing...driven it...