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The fan is located behind the glove box, above the passengers feet. The 2 most common failures are the blower motor and the blower resistor. This system is a switch to ground setup. Unplug the blower plug and see which wire is hot, it should always be with the key on. With the car running and the fan switch on, hit the blower with the palm of your hand. If it comes on, it is bad. the brushes wear out. Also you can unplug the resistor, and ground the output wire at the blower, or resister. to see if it works.
I'm going to start from the beginning. The blower motor gets power from the high blower relay and it is grounded thru the fan switch and the resistor. So you should have power on the pink white blower wire coming from the high relay to the blower motor. The orange black wire from the motor is ground going to the resistor and fan switch. The blue wires on the control panel are for the ac compressor. The high blower relay gets power from fuse number 5 in the box. The blower motor is grounded thru the resistor and then thru the fan switch. Photo courtesy of AutoZone.com
Go to the fuse block and check 15A fuse D which feeds power to the blower motor. Then check 10A fuse K which feeds power to the blower relay and the fan (blower) speed select relays. If the fuses check OK, the blower relay, the fan switch or the speed control relays may be defective. also, the fan speed resistor may be defective
there will be an access panel where the motor is located. 1st thing to check is fuse or circuit breaker feeding the air handler. this is on seperate power from compressor unit outside and usually has a fused or breakered disconnect on the side of the unit. if fuses are good or breaker is not tripped then switch fan mode to on. if blower runs in on but not in auto then it is a thermostat problem. if still no go then turn off power, remove access panel and find the squirrel cage fan blade. make sure it turns freely. it is very common for these motors to go bad. it can usually be removed easily and taken to a motor shop. I use Roy's Electric in Richmond, Va. They can test the motor on the bench and replace it if it is faulty.
First check the 15 amp HVAC fuse located in the main fuse block inside the car on the passenger side of the center console, under a cover. If the fuse is good, then the problem may either be the HVAC blower switch (which is the fan blower selector switch), the fan blower motor resistor, or the fan blower motor. An auto repair manual will explain and illustrate for you the steps on how to check each of these components.
Even after pushing the ac light switch on, the fan blower selector switch has to be turned on as well (working) because it provides an electrical path to the positive side of the battery to complete the circuit and turn the ac light on. What the ac light switch does is provide the electrical path for the ac compressor clutch to come on through the ac control relay which is controlled by the car's PCM(computer) when you want ac, but the ac light switch still needs to run through the fan blower selector switch to receive its power. You can turn on the fan without the ac light switch because it gets its ground path(negative) from the blower motor. So the blower motor has to work in order to provide a ground path for the fan blower selector switch to be functional. You could have a faulty blower motor which is why no air blows through the vents. The fan blower motor is located inside the car on the passenger side underneath the dash at the bottom end of the glove compartment box. You'll see it. It's right above where a person rests their feet on the floor. Therefore, if your 15 amp HVAC fuse is good, check to see if you have voltage at the blower motor connector. Unclip the connector and with the ignition on and the fan blower switch moved to any one of the first 3 selections, check for voltage using a multimeter. The voltage will vary because there is a blower motor resistor. Voltage should be higher on setting 3 than 1. If you do have voltage at the blower motor connector, check for a faulty blower motor. The auto repair manual will tell you how to do it using jumper wires.
It's normal that your car is running hot because the radiator fan works in conjunction with your ac compressor. If the ac is on, the radiator fan will be on and therefore the engine coolant temperature will stay in it's normal operating range. If the ac is off, the radiator fan will stay off as well and the engine coolant temperature gauge will begin to rise and show pretty hot (especially at idle). It will do this up until a certain degree then the radiator fan should turn on thermostatically and stabilize the temperature. It's scary and I know what your saying because it does that to my car if my ac isn't on. Don't worry it won't overheat.
Chk for power at the blower motor electrical connector. If no voltage, check the blower motor resistor, its within the blower motor vent (this controls power to the blower motor). Also, in theses vehicles water may have damaged the blower motor itself. Inspect the blower motor for proper function.
It may be the blower motor, or it may be the blower resistor. Check for power at the blower motor. If power present with system on and blower has good ground, motor bad. If no power check blower resistor in air box prior to blower motor. If power on input side but nothing coming out to blower change resistor.
2 things come to mind: can you hear the fan turning?
if not check for power at fan location. If there is power and the fan isnt spinning replace the fan. If there is no power there is a problem with the fan circuit which includes wiring fuse (you stated were ok) and Fan speed switch (might be a module)
Or there is a blockage it is possible for your heater core and evaporator to plug up with dust .
Check your fuses.If you have a test light, unplug the blower motor, start the car, turn the fan on, if you have power to the blower plug, the blower motor is bad. If no power, if it's not a fuse, check the blower motor resistor. Should be mounted right next to the blower motor. It is inserted into the evaporator box