Question about 2000 Pontiac Grand Prix

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Blower fan only works on high

1997 grand prix replaced the blower resistor as well as the climat control unit still only works on 5

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CHECK THE HVAC CTRL FUSE.

WITH A TEST LIGHT CHECK THE BLOWER RESISTOR FOR POWER ON THE YELLOW, TAN, PURPLE, AND LIGHT BLUE WIRES. THE ORANGE WIRES CONTROL THE HIGH SPEED CIRCUIT. DO THIS FOR EACH POSITION OF THE BLOWER SWITCH.

THE BROWN WIRE ON THE HVAC CONTROL CONNECTOR 1 POSITION B COMES FROM THE HVAC FUSE 20 AMP. NO POWER ON THAT WIRE WILL CAUSE THE BLOWER TO NOT FUNCTION ON THE LOWER SPEEDS.

Posted on Jul 14, 2009

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Heater fan not working - 30 amp HVAC fuse blows out repeatedly when replaced. Where should I look for root cause? Have dash disassembled, but can't see any bare wires anywhere behind radio/climate...


Try unplugging the blower motor, heater control unit and blower motor resistor. Replace the fuse then reconnect the items 1 by 1 and see what pops the fuse.

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I have a 2000 Pontiac Grand Prix GT. The blower motor only works in the High position. I replaced the blower motor resistor, but it didn't help. Shot the wires with a meter and get 11.8vdc through...


I would check all fuses associated with the HVAC, if all fuses are good and you are sure the new part you bought is good then the problem would be in the control unit.

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01 grand.prix ac fan switch only works on high. has a duel temp controller when you turn fan off the only way fan comes back on is to move the temp controller levers


Hi!!
When the Blower Motor Resistor (controls blower speeds) goes bad, the blower motor works only on HIGH SPEED. REPLACE IT.
BLOWER MOTOR RESISTOR Removal & Installation
  • Disconnect negative battery cable.
  • Remove right lower instrument panel insulator panel.
  • Disconnect blower resistor connector located behind right side of dash.
  • Remove blower resistor screws and blower resistor.
To install, reverse removal procedure
Good Luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa!!

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Replace the blower resistor that is mounted next to the blower motor on the passenger side of the vehicle.
This will restore correct blower operation and I suspect it is also back-feeding voltage resulting in your electrical issues.
Two screws hold the blower resistor into the heater case and it is very easy to replace.
Good luck

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Heater blower motor only works on high on 2002 pontiac gran prix se-instructions on diy replacement i have the part. Heater Fan works occasionally on speed 5 only. When it doesn't work at all the lights...


for the fan blower motor it could be the resistor or the fan control speed control switch is bad.for no lights replace the DRL RELAY for the lights. for the heated seats check the fuses.

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2000 grand prix fan speed


were these new parts ? from what i know if you have replaced the fan resistor motor and control unit there is nothing elese in the system i would double check it all again

Jan 12, 2009 | 2000 Pontiac Grand Prix

1 Answer

Climate control switch does not work in lower modes only in high.


The resister is located under the dash in the passenger footwell area. It is to the driver's side of the blower motor up against the firewall.

To remove, it's easiest to remove the passenger seat to lay down on the car floor. Next, find the blower resistor, remove the connector, remove the one front bolt and just loosen the two bolts by the firewall. Pull the resistor down and out from the two bolts. Installation of the new resistor is the opposite of removal.

Hope this helps

Jan 11, 2009 | 2003 Pontiac Grand Prix

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