The resistor for the fan speed is located under the dash on the passenger side. It comes with a modification. Once you locate and disconnect (its easy to find once you remove the plastic covering) you need to take a hot knife and make the opening a little larger. The part costs about $70 and it can be done in under an hour.
The blower motor is failing and will need replaced.
The most common cause is a failed blower motor resistor.
Fig 15 Blower Motor ResistorNOTE: The blower motor resistor is located on the lower right side of the heater housing.REMOVAL# Remove lower right underpanel silencer/duct. # Disconnect wiring connectors on blower motor resistor. # Remove blower motor resistor retaining screws. # Pull blower motor resistor out of heater housing.
On some modles it is on top of the heater coweling behind the glove compartment. on other models it is on the exterior under the hood just beside the heater hose/A.C. inlets.
Resistor is located in the lower right side of the heater housing on manual a/c vehicles. Resistor is located in the lower right side of the heater housing on manual a/c vehicles.
It can.
At the heater core itself.
The heater core is inside the HVAC housing, under the dash.
The heater core is inside the HVAC housing under the dash.
It is under the dash on the passenger side.
The blower motor is located in the same area as the resistor, it's held in with 3 screws. Removing them will allow the motor and wheel to drop down.
where to find heater resistor 2004