Hi guys,
1.8Tab, thanks for the link.
The page labeled "Exterior Lamps Circuit" holds the key. However, it's not entirely clear. Specifically, the Emergency Flasher Switch does the "blinking" for emergency flashers as well as turn signals, but the schematic doesn't show how that switch "knows" when you've engaged your turn signals. I'm guessing that the power it supplies to the Turn Signal Switch turns on and off ("blinks") which means you can't use it to supply power to a timer relay (relay will reset itself every time the "blink" occurs).
That's okay. It just means we need to grab a constant power source (blk/grn wire) to energize the relay.
So the circuit to do this will end up being pretty simple. Two timer relays will be needed. Finding a convenient place to tap into all the wires, and a clean way to mount the relays will be as hard as it gets.
My next task will be to source a relay (there are plenty to choose from) and dig in to the wires behind the dash. It will take me a couple of weeks to get to it (business travel in the meantime) but I'll post results when I have something to share.
Stay tuned...