Not that I need this right now but, has anyone had issues with the rear defrost in the 95 suburban?

I am assuming it's the switch but haven't tried to replace it yet. I've allready tried sanding the rear barn door electrical contacts.

Thanks.

Do any of the grid lines heat up? (They can also be tested with a test light hooked to ground) If so, you've got power, and need to repair a line (they work in series). If not, obviously check fuses (dash panel and underhood), if ok test switch. Otherwise, wiring or ground problem.