2001 Toyota Avalon

Electrical problem
2001 Toyota Avalon 6 cyl Front Wheel Drive Automatic 59000 miles

What causes radio sound to go off when activating rear defogger?
I checked the fuse section and noticed that 2 fuses are involved with the operation of the rear defogger, fuse #33 and fuse #63 (DEF 40A: rear window defogger, noise filter.
Could it be this fuse and does it refer to radio interference noise?
Thanks, Claude

PS: this is my first attemp with this web site and will make a donation on my next contact if satisfied with this first attemp.
Claude Gaulin
March 31, 2010.

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