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Re: 2004 Grand Prix blower motor???? GM Tech. help?
current flow;
battery, fuse, fan motor, resistor(or module if you have auto temp control), switch, ground.
if the fan is totally inop I usually find either a bad motor (tap with hammer handle to diagnose while on high) or melted connections at resistor.
if fan quit on only one or 2 speeds I usually find a bad resistor
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