Pontiac Problems? Ask a Mechanic for Answers ASAP
If the blower motor did not operate with a direct 12v applied to it (and the leads were set correctly to + and - ) then the Blower Motor will need to be replaced. Straight voltage (again, wired correctly) and the unit should respond. However, when the blower motor only works on the higher settings, and then not at all, are in fact signs of a faulty blower resistor. I would recommend re-testing the blower motor, making absolutely sure there is a solid 12v and the voltage is applied correctly. If still no operation- the blower motor is at fault.
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If there are any other questions you had on this, or you'd like the correct wire colors for the positive and negative leads to the blower, please feel free to reply and ask. I'll need the year, make and model of the vehicle.
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