[Vwdiesel] how to test rear window defrost lines

[William J Toensing]

I haven't tried this but if I was going to try which line was broken I would use one of these infra-red remote temperature thermometers with a laiser pointer that you can buy from Harbor Freight & Radio Shack. My guess is, after turning on the rear defroster, the line that is broaken would show a lower temperature. Another way would be to turn on the rear wintow defroster on a frosty day & note which line was not defrosting.
Bill Toensing, Nevada City, CA