The upper 3 lines on the glass are the AM radio antenna, the middle 8 are FM and defroster,
and the bottom 8 are defrost , if the middle 8 or bottom 8 have a break in the lines it will affect
how fast it defrosts. You can buy repair kits that consist of a small bottle of metallic foil paint.
Then you use masking tape to mask off each side of the line where a break is and paint a thin line to
reconnect it... I used it before to repair defrost elements and broken fm antennas.
Rear window defogger repair kit
Check fuse 35 in the rear power distribution box under the rear seat and check the defogger relay k13 under the rear seat.
