Question about 2003 Pontiac Bonneville

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The blower on my heater does not always work sometimes it comes on sometimes it does not. If it does not and i go over a bump it will come on. Someone told me it might be the resistor of so where is the heater box located thanks

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The blower motor will be on the passenger side up under the dash,held in place with(usually) three machine screws .The resistor block will be close to this location, a series of 5 or 6 wires in a row with a screw at each end. The block itself is about the size of a credit card a you will be able to hold the block up to the light and give it a visual inspection.If you have a meter or can borrow one check each run with the continuity option.I must say that this is a good place to start but I would also be looking for a poor connection as I am working away. wiggle the wiring harness and see if you can get the fan to cut in and out.Good luck and watch your back,its tight under there.

Posted on Nov 07, 2010

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If the blower motor is coming on when you bump the motor then is is more than likely the blower motor.The blower is on the passengers side under the dash.The resistor is close to the blower motor.Check the connections on the resistor and make sure they don`t look like they are getting hot.If they do then replace the resistor.Hope this helps.Good luck.

Posted on Nov 07, 2010

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