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1999 Buick Park Avenue rear window defroster

Tiny
DR.ROD
  • MEMBER
  • 1999 BUICK PARK AVENUE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 82,000 MILES
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
Saturday, October 24th, 2009 AT 8:05 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
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.
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Wednesday, November 25th, 2009 AT 10:23 AM
Tiny
BOWFAN
  • MEMBER
  • 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.
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Thursday, December 17th, 2009 AT 6:59 PM

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