I would think that if it was not an open circuit, that would be my first test. Does the wiring (paint) lose resistance over time?
Bert Knupp wrote: > Mike, > > You're right. I found an old German manual showing a photo of the metal-can > relay under the left end of the rear seat. It's a continuous-duty relay > (like headlights use) with an 8-amp continuous capacity to carry the high > wattage that the window defroster draws. > > And to those of you who sent tips about repairing damaged grid wires: > Thanks for the tips. I suspect that comes next! Does anybody know the > correct resistive load that the rear window defroster is supposed to > provide? That way I can test it before the snow comes. > > Thanks, > > Bert > > |__n__ > (_____)? > (È\_|_/È) > ³ ? ? ³ > Polizeikõfer '70 > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Mike > Sent: Saturday, October 17, 2009 5:52 PM > To: Air-Cooled Volkswagen Discussion List > Subject: Re: [vintagvw] Rear window defroster wiring > > I believe that relay was originally located under the rear seat. > ----- Original Message ----- > From: Bert Knupp > To: 'Air-Cooled Volkswagen Discussion List' > Sent: Saturday, October 17, 2009 6:00 PM > Subject: [vintagvw] Rear window defroster wiring > > > Volks, > > The previous owner of my '70- beetle disconnected the rear defroster, > leaving a black wire in black spaghetti tubing dangling under the car, and > no visible connection up front at the fuse box. The little toggle switch > is > under the dash, and it seems to be okay, though not connected to anything. > I'm guessing it's a grounding switch for a relay. > > Who knows the correct factory routing for this wiring circuit? My > schematic > shows a relay, though none is present up front in my car. I'll assume it > draws coil power from a #15/54 circuit somewhere. > > What's the correct original wiring and routing for the rear-window > defroster? I'm guessing I'll need to thread a new front-to-back wire (1.5 > mm?) parallel to the main harness. I need to figure out where my orphan > black wire comes from -- and goes to. Do I pull #30 power from my voltage > regulator's battery terminal? > > The printed wire grid on the glass passes cursory visual inspection -- no > obvious breaks -- but I haven't put a meter to it yet. Does anybody know > what the proper (disconnected) resistance for it ought to be? > > You can send me stuff off-list at [email protected], if you'd like. > > Bert Knupp > > |__n__ > (_____)? > (È\_|_/È) > ³ ? ? ³ > Polizeikõfer '70 > > > __________ Information from ESET Smart Security, version of virus > signature > database 4518 (20091017) __________ > > The message was checked by ESET Smart Security. > > http://www.eset.com > > > > _______________________________________________ > vintagvw site list > [email protected] > http://lists.sjsu.edu/mailman/listinfo/vintagvw > _______________________________________________ > vintagvw site list > [email protected] > http://lists.sjsu.edu/mailman/listinfo/vintagvw > > __________ Information from ESET Smart Security, version of virus signature > database 4518 (20091017) __________ > > The message was checked by ESET Smart Security. > > http://www.eset.com > > > > > __________ Information from ESET Smart Security, version of virus signature > database 4520 (20091018) __________ > > The message was checked by ESET Smart Security. > > http://www.eset.com > > > > _______________________________________________ > vintagvw site list > [email protected] > http://lists.sjsu.edu/mailman/listinfo/vintagvw > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.422 / Virus Database: 270.14.20/2444 - Release Date: 10/18/09 > 09:04:00 > > _______________________________________________ vintagvw site list [email protected] http://lists.sjsu.edu/mailman/listinfo/vintagvw
