Where is...

... the intermittent wiper relay physically located?
I'm pretty certain I've got an open wire or a bad switch or a bad relay.
Symptom:
Wipers don't park. Operate the same in intermittent and slow speed switch positions, i.e. on when switch is in either position, then stop without parking when the switch is returned to home position. Fast speed operates.

Suspects:
Park switch in wiper motor,
Wiper switch (looks pretty robust)
intermittent wiper relay (I can hear it switching)
open connection (wire off or in wrong place on one of the above).

This last seems most likely, but I've got to track down the relay to check its connections.

If I'd thought about it when I was out in the garage, I'd have followed the sound, and can still resort to that, but if anyone can point me in the right direction, I can save some time.

Thanks,