You are all wrong. This is not the resistor. Mine is the same way. Only works on high. On high, you bypass the resistor and go straight through the relay under the hood. I guess you COULD have a bad resistor, but it would have to be COMPLETELY cooked, which doesn't usually happen (usually you will only lose one or two settings). I have finally narrowed it down to the wire that goes from the resistor to the relay under the hood. Which means ripping out the dash (I think). Sucks.
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