Blower motor no speeds work!!!

10

Asked by Jan 18, 2016 at 01:20 AM about the 2001 Pontiac Grand Am GT Coupe

Question type: Maintenance & Repair

Ok,  I've done some research on this,  on the Grand
Am,  the speeds 1-4, are on one fuse,  5 is on
another.  So,  if NO speeds are working,  would this
mean it's the blower motor??  I've spent so much
fixing multiple things,  but,  it's Michigan,  it's
freezing,  and I'm dying.  Any help would be
appreciated.  With one headlight (hit a deer) bald
tires,  and no heat,  I'm literally in a death trap,  but,  
as of right now,  I can't fix all these things.  I'm
hoping it's this,  and I can fix it myself.  Thanks in
advance guys.

1 Answer

68,405

First thing to do is see if you have power to the blower motor. Unplug the motor and using a 12 volt DC test light with the ignition on see if you have power to the motor on all the speed settings. On #1 the test light will be very dim. On #2 a little brighter, and so on. If you have power to the blower motor but it won't run, replace it. If you don't have power to the motor check for power at the resistor block. This is a gizmo that sits near the blower motor with 5 or 6 wires plugged into it. Your test light should light up at 1 of the terminals with each fan speed that's selected. If you have power here but not at the blower motor the resistor block is bad. If you have no power here, pull the heater control panel and check for power at the fan switch. One of the terminals here should be "hot" with the ignition on. If so, the switch is bad. If not, check for power at the blower motor relay. This relay is usually in the underhood fuse box. If you have power here but not at the fan switch it's going to be a wiring problem. If not, check the fuses again. Or there's a wiring problem from the fuses to the relay. HTH. -Jim

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