Either the harness or the module is shot "or both" this is a common problem with the Aleros. The module is located on the passenger side rear. You have to pull off the rear trim piece "next to back window" The module contains both the rear defroster & radio circuit controls.
Module part #22618677 Cost:approx.$111.08
Harness part # 15305949 Cost approx.$29.48
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...Dan...
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