dvdhat

Hi, My 1999 Forester has an electrical ticking noise in the rear o/side corner that starts after the vehicle has been driven for a few miles and continues after the engine has stopped and the ignition turned off. It is like an indicator click (click, click .........click, click.....). It is loud enough to be heard when driving without the radio on. Any ideas what it is and does it need to be fixed? Thanks Dave