83 Ur-q rear window defogger weirdness

[David Ritter <dritter@mich.com>]

Hello, 
I have been trying to find a reason why my rear window defog suddenly
quit working. I have done several things, and still found nothing
wrong. Does this ring a bell with anyone?
I have,
1. Checked fuse, visually and with meter.
2. checked ground for circuit, after element.
3. checked element, still ok
4. checked entire circuit, from fusebox to element, good continuity.
5. checked fusebox from each side, good circuit.
6. checked from switch to fusebox, still good continuity.
7. checked power available at switch, still 12v+.
8. jumped switch connections, still nada.

Very weird indeed, maybe I missed something.

Any ideas?

Thanks,

David