Rear window defroster not working

[911rookie]

I have a 70 911T and the rear window defroster doesn't seem to work. All other electricals in the car appear to be working fine. Is there an easy way to determine if power is getting to the coils?

[Randy Webb]

why not measure the resistance across the window grid. You can measure volts at the same place.

Did you check the fuse? If Ok, I'd next check the switch.