The dealerships are now carrying the offending relay. That may be your quickest option. Last I checked, they weren't that expensive. There was also a problem with the IPDM that had broken soldering on the board. Sometimes it worked, sometimes it didn't. The relay being inexpensive, it's the first thing most will try. I believe you can swap one of the other relays as a test. I don't remember the exact one though. It might be the wiper or fog light relay.