My E350 Club Wagon IS not displaying the odometer reading all the time. I will turn it on and the display comes on with the Vans mileage and then another time it won't. When it is not displaying the odometer reading the turn signals don't work also. Is there a particular relay or fuse that I should be looking at? Thank you from San Diego.

 

More times than not, a questionable ground connection can do this.

If you haven't done this yet, remove one ground connection at a time clean it and reinstall it