The beauty of this problem is that it is not intermittent. It happens every time. That makes it soooooooo much easier to trace. A few years ago, I had an intermittent problem on my ERA. To diagnose it, I had little 12v indicator lights strung up all over the circuit and taped to the dash. When the problem occurred, I quickly looked at the dash to see what lights were lit and what weren't. That told me where the problem was (and where it wasn't), but, boy, that was a PITA.