tested the switch , fuse and relay all are good no power to glass contacts
Chevrolet Q&AAsk Your Question
2007 Chevrolet Cobalt Question: rear defroster quit working
Answer #1G. T. Service Center (2479 Answers) , Stephenville, TX - (254) 638-3236ProfessorG December 30, 2013, 11:03Master
Just asking, but you are saying the relay does engage when activated and you have continuity through it going toward the glass heater?
Replyhunter 516, December 30, 2013, 13:20Rookie
There are 4 prongs on the relay one is hot all the time one go's hot when the switch is turned on and the third go's hot with the relay installed
ReplyProfessorG, December 30, 2013, 13:55Master
Does one ground when the defroster is turned on?