Rear window defrost not working

2005 CHEVROLET IMPALA
180,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC
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STEVE HOPPING
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How many terminal on the relay should be hot? And is the heated mirror fuse have anything to do with it? Thanks
Sep 5, 2019 at 6:22 PM
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STRAILER
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Hello,

It should be two.here is the wring diagrams and a guide to help you test the relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what happens.
Sep 7, 2019 at 2:02 PM