How do you repair the seat heater on your 2004 Sienna?

Toyota has issued a technical service bulletin for seat heater replacement. It seems that this is not an uncommon problem. The seat heater has been redesigned. You can find the bulletin here: http://ww2.justanswer.com/uploads/jarrid191/2008-10-20_123630_T-EL002-06.pdf

or search on "toyota sienna seat heater problem"