- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Check for full battery voltage at the resistor block, it should have it any time the engine is on, If you don't have voltage to any of the connectors, there is usually a blower motor relay that needs to be checked if all fuses checked out as good. If it DOES have voltage to the resistor, put the blower speed to full high and check for voltage to the blower motor, if none, then there is a circuit failure, if there is voltage, check the ground side of the blower with an ohm meter, it should read near zero ohms resistance.
The brown wire at the speed switch is the power wire. Powers is then directed to the blower motor resistor throught the orange, lt blue and yellows wires. The blower motor receives power through the orange wire.
Check for power at the fuse with the key on. If there is no power the problem could be the ignition switch or the wiring in between the switch and the fuse block
Power for the blower starts at the fuse, goes thru the HVAC control panel, then the resistor block, then thru the high speed blower relay, then to the motor. You should have voltage at the resistor and at the relay.
Under dash panel,or behind glove box on most of vehicles.
HEATER BLOWER MOTOR
faulty blower motor resistor. The low and medium speed on blower motor is
controlled by resistor and its actual speed is high. So because resistor is not
working, blower motors actual speed which is high is working.
can be faulty blower motor or faulty blower motor resistor. Get the blower
motor inspected. If it's faulty it has to be replaced.
blower motor testing and replacing, check the link below: ----
You may want to try your fan on all speeds. If it will work on high, you have a bad resistor for the fan motor. ( high speed doesn't go through the resistor ).
If it doesn't work on any speed, I would check the following;
1. Make sure the fuse isn't blown for the fan blower motor.
2. Check, or have checked the wires between the fan control switch and the fan blower motor.
3. Have the fan control switch checked.
4. Have the fan blower motor checked.
Check fuse supplying fan is not blown,
Check blower control switch is operating OK,
Check relay controlling fan is operating OK,
Check variable speed resistor pack is not faulty (the resistor pack is usually located in the blower ducting, in the blower airflow),
Check blower motor ground connection is not missing.
that cliking you hear is most likely the heater relay. but i don't think thats it, i would be checking to see if there is a resister, for the blower motor, it should be someware around the blower motor along with the relay in the same place. it will be on the heater box held in with a couple of screws, and a plug going to it with 4 or 5 wires.when they go bad, blower may only work on one or two speeds or not at all.