In addition to my turn signals not working, occassionally my XJ won't start. I'll stift my gears and try it again and after a couple cycles like this and it starts right up. Completely baffling, given that my 4-ways work fine. It all started last summer with some strange buzzing. Replaced the flasher, checked the fuses, nothing works. My rear window heater went out about the same time. Any ideas? Bad ground?