How do you test a radiator fan motor?

How do I know if my radiator fan motor is bad?

These are the most common signs of a faulty radiator fan assembly in need of replacement:

  1. Engine Overheating. When the radiator fan isn’t functioning properly, it is not able to adequately cool down the car’s engine. …
  2. Air Conditioner Function Diminished. …
  3. Loud Noise Coming From Radiator Fan.

How do you test a radiator fan?

How to Check a Radiator Fan

  1. Determine whether your radiator fan is manual or electric. …
  2. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on.
  3. Use the volt meter to test if there is power to the wires. …
  4. Normal voltage for a radiator fan is around 12 volts.

How do you test a fan motor with a multimeter?

The black multimeter probe will go to the negative battery terminal (for under-hood fuses) or a metal ground point on the car (for under-dash fuses). Each fuse has two contacts where you have to touch the multimeter’s test probes to get the readings. Touch the red probe to any of the two contacts and take the reading.

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How can you tell if your cooling fan is bad?

The first symptom or sign that something has gone wrong is that your cooling fan doesn’t come on at all. This is the most common symptom of a faulty cooling fan motor, but it may not be one you notice while driving your vehicle. If the motor burned out or starts to fail in any way, the cooling fans are disabled.

What happens when a cooling fan goes bad?

The most common symptom that the radiator fan has gone bad is that it will stop working. Sometimes the motor burns up or fails. Other times, the relay stops working. Either way, you know there is an issue with the fan system if it is unable to run.

How do you test if a fan is working?

Look and Listen. The fastest way to tell if your computer’s fan has stopped working is to visually inspect it. If it’s a desktop computer, you can usually see the fan rotating on the back of the case. If the fan is not moving, you must replace it immediately, before using your computer further.

How many ohms should a radiator fan have?

Since the series solution works on low, then I would think if you measured the resistance of your fan without the resistor, and bought that OHM resistor to use on the Low circuit, you would be good to go. It should be something pretty low- 1-2 Ohms, probably. It takes a pretty healthy resistor to survive.

What would cause a radiator fan to stop working?

The most common reasons a radiator fan is not working are luckily due to a blown fuse, bad relay, or a broken wire. It can also be caused by a faulty coolant temp sensor, low coolant level or the fan itself can be damaged.

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How do I know if my radiator fan relay is bad?

Bad Cooling Fan Relay Symptoms

  1. The engine runs hot or overheats. …
  2. The cooling fans don’t work. …
  3. The cooling fans keep running. …
  4. Warning lights. …
  5. Poor air conditioning performance. …
  6. Swapping Relays. …
  7. Measuring the Relay Coil’s Resistance. …
  8. Listening for Noises.