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Rear Window Defogger System: Repair

Clean the broken portion with alcohol or white gasoline.
Mask both side of wire with thin film.
Apply the conductive silver composition to the broken portion.
Conductive silver composition: by Permatex QUICK GRID

Fig 1: Applying Conductive Silver Composition To Broken Portion
Courtesy of SUBARU OF AMERICA, INC.
Dry using a dryer after applying the composition.
After repair, check the wire.