[Vwdiesel] how to test rear window defrost lines

Thu Nov 17 11:24:41 PST 2011

well, that is what I kind of thought was happening when I would see higher resistance.

I can try that route as well and see how it goes, as it is an easier route.

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: Dave Cook <davevw at yahoo.com>
To: VW Diesel Group <vwdiesel at vwfans.com>
Sent: Thursday, November 17, 2011 12:13 PM
Subject: Re: [Vwdiesel] how to test rear window defrost lines

I read about testing those things once with an ohm meter.  I think the procedure involved wadding a couple bits of aluminum foil and sticking the probes in them.  Then you hold the pieces an inch or two apart and slide them along a line slowly.  As long as the resistance reading stays low, then you have a good section of line between the bits.  If you come to a section with high resistance, then you know the current is having to flow through the bus bars (as mentioned) instead of directly and there is a break between the two probes.  Look very closely at the lines for any signs of scratching in the paint, or burned looking spots.  

Seemed like that article alsomentioned using the foil ball to remove surface corrosion on the line to help it heat up better.

Dave Cook

________________________________
From: Bryan Belman <dieselwesty at yahoo.com>
To: "LBaird119 at aol.com" <LBaird119 at aol.com>; "vwdiesel at vwfans.com" <vwdiesel at vwfans.com>
Sent: Thursday, November 17, 2011 10:57 AM
Subject: Re: [Vwdiesel] how to test rear window defrost lines

OK, this thing has been out for weeks and I need to get it back in as the van is only in a car port with open end.  Plastic on the hole, but.

I have an old battery that I can do the test will, will put the glass outside in the garage and bring it into the warm house later tonight to test.
I would really like to get it fixed outside of the van and put the new tint on in the house on work table, then rubber and put it back in.

thanks

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: "LBaird119 at aol.com" <LBaird119 at aol.com>
To: vwdiesel at vwfans.com
Sent: Thursday, November 17, 2011 11:44 AM
Subject: Re: [Vwdiesel] how to test rear window defrost lines

In a message dated 11/17/2011 8:07:24 A.M. Pacific Standard Time,  
dieselwesty at yahoo.com writes:

Now,  having trouble finding a good way to test, ohm meter does not seem to 
be the  way and I do now want to hook a battery directly up to the glass, I 
do not  think that is a good idea.

Find a walk in freezer or chest freezer big enough (I'd let you use  the 
walk in at the pizza place if you were a few thousand miles closer!) then  
hook up a battery to it.  They run on 12V, if you're concerned that too  many 
are bac an it'll burn (which doesn't seem to happen) then use a 6V or maybe  
the 6V setting on a charger, or a semi bad 12V battery.  The bad lines  
should show up pretty quickly as they don't burn off any condensation or frost,  
after putting the glass back into room temp.
    Loren
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Pacific Standard Time,  
dieselwesty at yahoo.com writes:

Now,  having trouble finding a good way to test, ohm meter does not seem to 
be the  way and I do now want to hook a battery directly up to the glass, I 
do not  think that is a good idea.

Find a walk in freezer or chest freezer big enough (I'd let you use  the 
walk in at the pizza place if you were a few thousand miles closer!) then  
hook up a battery to it.  They run on 12V, if you're concerned that too  many 
are bac an it'll burn (which doesn't seem to happen) then use a 6V or maybe  
the 6V setting on a charger, or a semi bad 12V battery.  The bad lines  
should show up pretty quickly as they don't burn off any condensation or frost,  
after putting the glass back into room temp.
    Loren
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Vwdiesel mailing list
Vwdiesel at vwfans.com
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Vwdiesel mailing list
Vwdiesel at vwfans.com
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