Pontiac Problems? Ask a Mechanic for Answers ASAP
Hello I will help you with your question,
There is a rectangular box mounted on the side of the blower motor housing under the right side of the dash. Pull the connector for that and the blower motor and inspect for burnt or melted connections. If you find any the connector and the component it is connected to need to be replaced.
If you find nothing check the knob to see it is really turning the shaft of the blower switch. They can crack and slip.
Last try slapping the bottom of the blower motor when it does not come on, if it then starts replace the motor it is worn.
If you have a voltmeter I can help you check to see which component is failing if you can test it when the motor is not coming on.
Please let me know how I can help