Question about 2003 Pontiac Grand Prix

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2003 pontiac grand prix, a/c controler works on speed 5 only. checked the blower motor and it works good. checked all the fuses and they are all good. replaced the motor resistor, and checked the wiring from the 5 speed contoro switch to the resistor and all good... but it still only works in speed 5 only.

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It could be your actually controll switch

Posted on Jul 29, 2010

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1998 Pontiac Grand Prix GT - Blower Motor will not blow in the lower speeds, High Speed (5) only. Resistor has been replaced 3 times in the last twenty four hours, blower motor has been replaced twice in...


Your ignition switch is bogus. High speed runs directly off the speed control but the lower speeds go thru the ignition switch. Do not know why but that is the way it is!!!!!!!!
Replace the ignition switch and you will be back in business.

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Hi!!
When the Blower Motor Resistor (controls blower speeds) goes bad, the blower motor works only on HIGH SPEED. REPLACE IT.
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1997 Pontiac Grand Prix GT; Elec problem with fan


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This will restore correct blower operation and I suspect it is also back-feeding voltage resulting in your electrical issues.
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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.

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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.

Jun 01, 2009 | 2002 Pontiac Grand Prix

1 Answer

Fan only works in the off and 5 position, does not work in 1to 4


You probably need to replace the blower motor resistor. Located on the blower motor below your glovebox. about $25 for the resistor.

Apr 10, 2009 | 2003 Pontiac Grand Prix

1 Answer

1997 grand prix heater blower motor


theres a speed resistor close to the fan it is blown ,,unplug and check for power and jump across will give you one speed

Dec 30, 2008 | 1997 Pontiac Grand Prix

1 Answer

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Try replacing the blower motor resistor, it has different resistances for each speed. Mounted on the passenger side air duct, it is kind of a ***** to get to but you can see the harness if you invert and shove your head up into the footwell.

Jul 27, 2008 | 2003 Pontiac Grand Prix

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