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No rear window defrost: 1991 940 SE 900 1991

posted by  gptjr on  Sat Dec 6 23:26 CST 2003
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I have checked the ground point, and there is 12 volts passing through the circuit. Despite the apparent integrity of the system electrically, there does not seem to be any heat generated in the window to be useful. Could the grid itself be defective in some manner, or is it possible that there is simply not enough current being supplied to cause heating. Does anyone know if there is a relay or other device that might be limiting current to the rear window defroster?






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