blower motor resistore on 1994 Ford Tempo

my heater only works on LOW, not high. could it still be blower motor resistor? they told me at auto parts store that's 99% what it is so I ordered part. Where is part located and is it difficult to replace?

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1 answer
Its located on the heater box and here's what it looks like http://www.napaonline.com/Search/Detail.aspx?A=ECHBR310_0239906460&An=599001+101994+50026+2026032 Hope this helps