I recently had to get help to find my ignition relay on my 2000 Magna. If you don't get a rapid response here, try the Yahoo CC Owners group. Be sure to include your coach run # with year and model. Mine was in the front run fuse box in the bay under the driver's seat. I've seen posts for other models that is under the dash behind a panel in front of the passenger seat.
If you need a new one you will be looking for a continuous duty 80 amp with insulated (or isolated) coil. Although I replaced mine with an 80 amp rating, I plan on purchasing a Cole Hersee 200 amp version just to have handy should the replacement die.
Hope you get a quick answer.
Pete - Full Timing
2000 Country Coach Magna 40', CAT C10, #5892
2006 Jeep Liberty