[Vwdiesel] how to test rear window defrost lines

[mark shepherd]

Bryan, if it were me, I'd use the resistance range. Sliding the covered 
probes along any track will display zero ohms until a break, and then it 
will jump up to a little over zero ohms. ;o)...

Ah... I  completed reading your post. New lines sounds great. Come to think 
of it I may have two spare rear hatches  with glass.

Mark


----- Original Message ----- 
From: "Bryan Belman" <dieselwesty at yahoo.com>
To: "William J Toensing" <toensing at wildblue.net>; "VW Diesel Fans" 
<Vwdiesel at vwfans.com>
Sent: Monday, November 21, 2011 5:04 PM
Subject: Re: [Vwdiesel] how to test rear window defrost lines



Here is my re-cap on my fix. I gave up.
After 2 hours of testing and probing to find solid voltage and no voltage 
and low voltage, I have come to the conclusion that there is not enough 
metallic material left on my 1982 rear window to fix it. After removing the 
tint and meticulously cleaning the glue off the glass so as not to mess up 
the defrost lines, it must have gotten pulled off with the tint or my razor 
blade...................
so, starting over and getting new grid lines from Frost Fighter for $35.
I will removal what is left and install new.

I also have the rear window to the bug project that is out of the car with 
rubber and trim on it, waiting for installation (SOMEDAY), I tested and it 
has Nothing left on it, but 41 years old, so why would it. I will be 
ordering one for that as well.
I am going to call the company to see if I can buy just the grid lines, this 
complete kit has relays and switches included as if you do not have any 
defoger, not needed and it is $45.
http://www.frostfighter.com/prt2600.htm

I bought 2 of the repair kits from them and will not be opening the one so 
hopefully can return it for $20 or sell on e-bay.
I will let you know how I make out, I only want the lines. I see that on the 
beetle back window, because it is so curved, I will have to apply each line 
1 at a time and have it overlap the bus bar as the sides of the glass.
the fun never seems to end and I still have no back window in the van. Good 
thing camping season is over.



Bryan Belman, Pt. Pleasant, NJ
04 Jetta Wagon TDI PD, 100hp, 5sp -- running :<)
92 Jetta 1.6 Eco-Turbo Diesel, 5sp -- running :<)
82 Diesel Westy 1.9NA -- running :<)
70 Type 1 stock Elm Green Beetle -- Under Restoration :-)

From: William J Toensing <toensing at wildblue.net>
To: VW Diesel Fans <Vwdiesel at vwfans.com>
Sent: Monday, November 21, 2011 12:54 AM
Subject: [Vwdiesel] how to test rear window defrost lines

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
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