How to troubleshoot a Cavalier radiator fan that is not working?

How to troubleshoot a Cavalier radiator fan that is not working?

Install a jumper wire to the red wire at the harness connector and the black wire to ground. Touch the red jumper to battery positive side and the fan should operate if it is not burnt out. If it does not come on, check the connection for a good power and ground on the jumpers. If the connections are good, replace the fan.

Where is the ECT on a Cavalier radiator?

It is located near the coolant outlet on the upper rear of the hose. When the connector is pulled off of the ECT, within a second or two the fan should come on. If it does come on, the ECT is suspect. Check the voltage with the meter by backprobing the sensor when the engine warms up.

What should I do if my radiator fan is not working?

Inspect the radiator fan by spinning it with the fingers and see if it is free moving. Do this only with the engine off and cool. The fan can come on at any time even with the key off when the engine is warm. Install a jumper wire to the red wire at the harness connector and the black wire to ground.

How does a radiator fan work in a car?

They are actuated by the computer, which uses the engine coolant temperature (ECT) sensor to determine when to turn the fan on and which relay to actuate dependent on the temperature. The ECT sensor is a 2-wire thermistor. As engine coolant temperature increases, the thermistor resistance and signal voltage decreases.

Why are the cooling fans not working on my car?

1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

What to do if your cooling fan relay is failing?

For this reason, if you suspect that your cooling fan, or relay, may possibly be having issues, have the vehicle diagnosed by a professional technician, such as one from YourMechanic. They will be able to look over your vehicle and replace your cooling fan relay if necessary.

Install a jumper wire to the red wire at the harness connector and the black wire to ground. Touch the red jumper to battery positive side and the fan should operate if it is not burnt out. If it does not come on, check the connection for a good power and ground on the jumpers. If the connections are good, replace the fan.

Inspect the radiator fan by spinning it with the fingers and see if it is free moving. Do this only with the engine off and cool. The fan can come on at any time even with the key off when the engine is warm. Install a jumper wire to the red wire at the harness connector and the black wire to ground.

Can a car fan come on when the engine is off?

The fan can come on at any time even with the key off when the engine is warm. Install a jumper wire to the red wire at the harness connector and the black wire to ground. Touch the red jumper to battery positive side and the fan should operate if it is not burnt out.

It is located near the coolant outlet on the upper rear of the hose. When the connector is pulled off of the ECT, within a second or two the fan should come on. If it does come on, the ECT is suspect. Check the voltage with the meter by backprobing the sensor when the engine warms up.

Why is my speedometer not working on my Chevy Trailblazer?

Your Chevrolet’s speedometer gives important readings about your current speed. If you are experiencing problems with yours, don’t fret — these issues are common and easily fixed (usually). In fact, TrailBlazer speedometer problems are one of the most common topics discussed on popular Chevy online forums.

Why is the AC not working on my Chevy Cavalier?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my Chevrolet Cavalier has air conditioning problems?

How is the radiator fan on a Chevy Cavalier controlled?

A radiator cooling fan on a Chevy Cavalier is controlled by the computer. Its circuit goes from the battery positive to the fuse. From the fuse it travels to two relays: the low-speed and the high-speed relay.

What’s the problem with my 2000 Cavalier heater?

My 2000 cavalier is loosing some serious coolant. There is no sign of external leakage and I’ve checked the oil and it’s normal. There isn’t any smoke either. Where is it going. I’m also loosing power and it’s getting hard to start. The heater blows hot on and off, the thermostat has been replaced and the temp. gauge is on red and fluctuates.

Why is my Cavalier 2.2 leaking coolant?

There is a leak due to corrosion in an elbow in the coolant system in my son’s 2002 Cavalier 2.2. The upper radiator hose connects to the elbow, which goes into the engine (block?).

Why is my AC heater fan not working?

This sounds more like a problem with high speed fan relay. On the low speeds, the fan relay routes the voltage thru the resistor block. When you switch to high fan speed, the relay switches over to supply full voltage from the battery to the fan motor.

My 2000 cavalier is loosing some serious coolant. There is no sign of external leakage and I’ve checked the oil and it’s normal. There isn’t any smoke either. Where is it going. I’m also loosing power and it’s getting hard to start. The heater blows hot on and off, the thermostat has been replaced and the temp. gauge is on red and fluctuates.

There is a leak due to corrosion in an elbow in the coolant system in my son’s 2002 Cavalier 2.2. The upper radiator hose connects to the elbow, which goes into the engine (block?).

What are common reasons my Chevrolet Cavalier has air conditioning problems?

What are common reasons my Chevrolet Cavalier has air conditioning problems? While there are a variety of reasons your Chevrolet Cavalier air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

Why does my car’s radiator fan stop working?

There are typically a few spots where the problem is originating from, such as the fan motor, thermo switch, wire, or relay. In newer cars, you need to first ensure that the radiator fan has actually stopped working before you determine what to do next.

Can a car run if the radiator is not working?

Can I drive my car if the fan is not working? Yes, your car can still run without a radiator fan, but you never should. Your vehicle’s cooling system is crucial to the engine’s performance and lifespan. Every time your engine overheats, you’re causing tremendous damage to the precious engine.

Why is my radiator fan not coming on?

When the connector is pulled off of the ECT, within a second or two the fan should come on. If it does come on, the ECT is suspect. Check the voltage with the meter by backprobing the sensor when the engine warms up.

Where is the relay on a radiator fan?

The fan relay is often located in the engine bay’s fuse box, but the best way is to check your repair manual to find where it is located. Testing a 4 pin relay is often very straightforward. Remove the relay and give 12 volts to pin 30 and 85. Ground pin 86 and check if there is voltage coming out from pin 87.

How does the radiator fan work on a warm engine?

As engine coolant temperature increases, the thermistor resistance and signal voltage decreases. On a cold engine, the voltage is sent through a high resistance circuit in the computer. On a warm engine the voltage is sent through a low-resistance circuit in the computer.

How does a high speed radiator fan work?

From the fuse it travels to two relays: the low-speed and the high-speed relay. Both of these relays have a separate hot wire to the fan. They are actuated by the computer, which uses the engine coolant temperature (ECT) sensor to determine when to turn the fan on and which relay to actuate dependent on the temperature.

The fan relay is often located in the engine bay’s fuse box, but the best way is to check your repair manual to find where it is located. Testing a 4 pin relay is often very straightforward. Remove the relay and give 12 volts to pin 30 and 85. Ground pin 86 and check if there is voltage coming out from pin 87.

What happens when a cooling fan relay fails?

If the relay fails, it will be unable to supply power to the fans, and as a result they will not operate. This can lead to overheating, especially when the vehicle is at a stop, where there is no forward motion by the vehicle to pass air over the radiator. 3. Cooling fans stay on at all times