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The relays for the blower are under the hood, near the top of the firewall on the passengers side. You will need to remove the plastic "fuse cover" to access them below the fuses. Replace them one at a time to see if this fixes the problem. If the blower is running intermetantly, then you may find you have to replace the blower motor (I needed to do this on my car $45). In order to do this you'll have to remove a bracket and several other lines in front of the blower motor to get enough clearance. If it works only at certain fan speeds then also check the blower resister located under the relays.
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Can you explain the question in more detail?
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