1999 Buick Park Avenue rear window defroster

1999 BUICK PARK AVENUE
82,000 MILES • 6 CYL • FWD • AUTOMATIC
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DR.ROD
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  • 1 POST
what relay runs the rear window defroster?
light comes on on rear def switch, heated side mirror heat works, - no rear window defrost- no fuses blown
Oct 24, 2009 at 8:05 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
The same relay / curcuit that runs the heated mirrors runs the rear defroster. Power comes to the switch from the fuse box, runs through the switch and back into the fuse box where it is distributed to the mirrors and the the rear window. From the window it goes straight to ground.
Nov 25, 2009 at 10:23 AM
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BOWFAN
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  • 16 POSTS
I think you can find the problem with this write-up from Backyard_Jim:

https://www.2carpros.com/forum/1998-buick-park-avenue-rear-window-de-icer-vt234240.html

I think it helped me to find mine.
Dec 17, 2009 at 6:59 PM
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