2000 Chevrolet Impala

Hi I have a 2000 Impala and the problem im having is that my rear defroster isn't working. I have tested the relay up front on the passenger side an seems to be working fine. (I used a test light tho)I have checked the connections in the rear window an only got power out of the drivers side rear lower connection. The drivers side upper connection no power. Passenger side connection I guess is probably the ground. Im getting confused on whats going on and what else could I check out if I havent already thanks for replies.L
December 29, 2010.

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