Recently, my 2006 PT has started to have intermittant electrical issues. It will drive fine for miles, then all of the sudden, the digital odometer readout will start "flickering"....if it is at night, you will see it in the headlights as well. (Tail lights too.)...as well as clock light, etc. ,Tends to do it more often if the (stock) radio is on....sometimes the radio will just suddenly stop working... Shut the car off, go into a store or whatever, come back out, start the car....everything, including radio, is normal. It may drive 50 miles without doing it, or it may start doing it after driving a mile or two near home...no rhyme or reason to it. Of course, I brought it to my mechanic, it woulden't do it with a test drive, any tips, suggestions?