Turn the switch on and check the voltage between two connectors. You should
get battery voltage. Even if all the lines are broken, you will still have
voltage. If you don't have any voltage, check the fuse and the relay.

"ACG" <adamgold16@yahoo.com> wrote in message
news:62d4efc6b7789948afefa8792b41671f@localhost.ta lkaboutautos.com...
> My rear defroster suddenly stopped working. I took it to the dealer and
> they said that there were too many scratches in the lines. I would have
> to get a new rear windshield installed if I wanted the defroster to work.
> But if the cause truely was non scratched lines, wouldn't at least some of
> the lines work? Currently, none of them work leading me to believe that
> there is a problem in the electrical system. Thoughts?
>