Rear defrost doesn't work

I have a 2002 Grand Prix and the rear defrost just went out. It would work. Then it would work every once in awhile, and now it just doesn't work at all. Any suggestions on how to fix this problem.

Thanks in advance

Check the RDEFOG fuse or circuit breaker located in the passenger side fuse block. Other possibility is the rear defog switch itself or the rear defogger relay which is located on the right hand side of the dash behind the glove box.






http://i5.photobucket.com/albums/y186/lizzywiz/gtp.jpg
Thrasher CAI, DHP v1.0 PCM, SLP Headers,
3.25 SC pulley, CAIT GMAF, 2.5 DP/Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 72mm TB,
TB spacer, MSD 8.5mm wires, Autolite 103,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials
1/4 ET: 13.210 sec. @ 104.490 mph
0 - 60 ft: 1.945 sec.

Bob-is there a mogeual(sp) like the alero that is on the pass rear piller, that would be on the gp as well?