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Why does my rear defroster keep blowing fuses? 200 1990

the wiring harness through th etailgate hinge is probably worn out. Th e insulation on the wire, and the wire itself becomes brittle with time and eventually fails. The power supply wire is porbably shorted out to the hinge. Lift up the tailgate and inspect the wires, you should easily be able to see if they are broken. Search the archives, there are several descriptins on how to replace or repair the existing harness or install a revised harness that will have less ware and tear.






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