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First umplug the heater motor. If is doesn't blow, replace the motor . If it does, you have a short in the wiring.

You probably have a bad motor, and, you need to go to a car parts store, and get a repair manual for your car. They cost about $16.00 Or, go to a Public Library.

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βˆ™ 2015-07-16 18:29:51
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Q: How do you troubleshoot a constantly blowing fuse for the AC Heater circuit on a 1991 Chevy Cavalier?
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