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Does anyone know why the rear window defrost system wouldn't be working to it's full potential? I'm assuming a low voltage issues, but my OBD2 Scans don't indicate this to me, so I was just wondering if anyone else has had this issue. The only electrical issue I've found in my system is a Reference 1, 2, 3 and 4 Voltage is completely out range. The acceptable range being 0 to 5V for this system and it reads as 5.01 on my scanner. This system seems to be connected to my ignition system though, so I don't think it relates to this defroster post, but if anyone has info on either one of these it would be helpful for me...
 
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