How is the radiator fan on a Chevy Cavalier controlled?

Table of Contents

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.

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.

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.

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.

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.

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.

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.

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.

How do you replace a radiator cooling fan?

Begin with the engine cold, vehicle on level ground in park, with the emergency brake set. Step 1 – Locate and disconnect the electrical connector for the cooling fan. Step 2 – Next, remove the lower mounting bolts that attach the fan to the radiator. (Note: Some vehicles have alignment dowels which need not be removed.)

Where is the electric fan on a radiator?

An electric fan motor connected to a plastic fan blade located directly behind the radiator which is controlled by a coolant temperature sensor. This engine temperature information is utilized by the computer which signals the control relay to send power to the cooling fan.

Is there a fan replacement for a Chevy radiator?

CHEVROLET CRUZE RADIATOR FAN REPLACEMENT REMOVAL. CHEVY SONIC RADIATOR FAN – YouTube CHEVROLET CRUZE RADIATOR FAN REPLACEMENT REMOVAL. CHEVY SONIC RADIATOR FAN

How to remove the radiator fan on a Chevy Cruze?

CHEVY SONIC RADIATOR FAN – YouTube CHEVROLET CRUZE RADIATOR FAN REPLACEMENT REMOVAL. CHEVY SONIC RADIATOR FAN If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

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.

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.

How do you replace a heater core in a Chevy Cavalier?

Position the replacement heater core and attach the mounting clamps. Replace the heater core cover and reconnect the heater core outlet. Reconnect any hoses that you can reach from the interior of the car.

Is it hard to replace a radiator hood?

Replacing fenders and hoods are really not that hard as long as you have something that is straight and lined up to bolt them to. The hardest part about replacing a radiator support is cutting the welds. First you have to find and identify all the spot welds you will need to cut out. Then there is the physical work itself.

Position the replacement heater core and attach the mounting clamps. Replace the heater core cover and reconnect the heater core outlet. Reconnect any hoses that you can reach from the interior of the car.

What’s the hardest part of replacing a radiator?

The hardest part about replacing a radiator support is cutting the welds. First you have to find and identify all the spot welds you will need to cut out. Then there is the physical work itself. Most radiator support have at least 20 welds that have to be cut out and this can get monotonous and tiring.

Can a radiator support be cut out and replaced?

Most radiator supports are welded in and have to be cut out and welded back in. If you are interested in learning more on how to do this type of repair and learn true body work and paint, follow this link: If you found this video valuable, give it a like. If you know someone who needs to see it, share it. Leave a comment below with your thoughts.

Are there any fan belts left for Vauxhall?

Find out now. Only 1 left. Only 1 left. Only 1 left. Only 1 left. Only 1 left. Ferodo V906 Fan Belt, Bedford CA Van,JO. Datsun 1300, Vauxhall 101 & VX 490 FC.

Why does my car overheat when I Turn on the fan?

The cooling fan, which is behind the radiator grille, removes heat from the engine’s coolant. This fan is electrically controlled and relies on the signal from the onboard computer. If the fan receives a false signal, the fan might not turn on, causing the engine to overheat.

What does it mean when your radiator fan is not working?

This is what we call a blown fuse. A blown fuse is no big deal, and changing one does not cost a lot of money. If your car’s radiator fan is non-functional, check your car’s user manual and locate the fuse for the radiator fan controller or the fan.

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.

What is the fuse box diagram for a Chevy Cavalier?

Here you will find fuse box diagrams of Chevrolet Cavalier 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Why does my car have a radiator fan?

You probably already know the purpose of the radiator and the cooling system in your car. When you are driving fast, the wind is passing through the radiator to cool the coolant down without issues, but when you are driving slow, there is no wind pushed through the radiator. This is why we use a radiator fan.

Is there a way to test a radiator fan?

You can test the electrical radiator fans by taking a wire from the car battery, unplug the radiator fan connector, and put 12v+ and ground into the connector. This is the fastest and easiest way to test your radiator fans. Because the radiator fan is often drawing so much power, there is often a relay that is powering the coolant fan.

You probably already know the purpose of the radiator and the cooling system in your car. When you are driving fast, the wind is passing through the radiator to cool the coolant down without issues, but when you are driving slow, there is no wind pushed through the radiator. This is why we use a radiator fan.

You can test the electrical radiator fans by taking a wire from the car battery, unplug the radiator fan connector, and put 12v+ and ground into the connector. This is the fastest and easiest way to test your radiator fans. Because the radiator fan is often drawing so much power, there is often a relay that is powering the coolant fan.

Why does my Chevy Cavalier not turn on?

1996 Chevy Cavalier 2.2 lt engine. Today i found, Cooling fan does not turn on even after reaching operating temperature.Engine overheats when idling. It does not turn on, when A/C is turned on ( I realized AC is also not working on my car, it may be related or not).

How can I tell if my radiator fan is working?

When a radiator fan works it usually makes a whirring sound that is easily noticeable. However, the radiator fan does not always start spinning on ignition. The ECU signals the radiator fan to work at the precise time. So, do not worry if the fan doesn’t immediately start working. Visually check the fan if you don’t hear its noise. 1. Broken Fuse

What to do if your computer cooling fan won’t run?

Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor. The relay, however, has direct power to one side, the same as a light switch.

When does the PCM turn on the cooling fan?

When the temperature reaches about 223-degrees F (value depends on make/model/engine), the PCM will command the cooling fan relay to turn on the fan. It does so by supplying the ground to the relay.

What causes a car cooling fan to stop working?

There’s many reasons why a cooling fan could stop working, such as a bad sensor, relay, fuse and more. DIY car repair with Scotty Kilmer, an auto mechanic for the last 42 years. 1. Bluetooth Scan Tool: http://amzn.to/2nfvmaD 2. Cheap Scan Tool: https://amzn.to/2D8Tvae 3. Professional Socket Set: http://amzn.to/2Bzmccg 4.

What causes a car cooling fan to run continuously?

2. A cooling fan temperature switch (or sensor, in some vehicles) can also get stuck, which may cause the fan to run continuously any time you turn the ignition key on or start the engine. Troubleshoot the switch. 3.

How to troubleshoot an electric cooling fan problem?

1.Has the Cooling Fan Actually Failed? 1 If the fan comes on when the AC is running at MAX, but doesn’t run when the engine is hot, check the temperature sensor… 2 If the fan fails to come on, first check for a fan blown fuse or triggered breaker. On older vehicle models, you may… More

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 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.

How does the cooling fan relay work on a car?

The cooling fan relay is the relay that controls the engine’s cooling fans. When the correct parameters are met, a temperature switch or the computer will activate the relay, which will allow power to the fans. The relay will usually be activated once it is detected that the vehicle’s temperature…

What kind of relay do I need for a radiator fan?

Purchase a 4-post relay with a 30-amp rating. Locate the relay in immediate proximity to the fan being used. Find a spot to secure the relay with a screw or a bolt. Install a 10-gauge wire to the battery positive terminal with the use of a round electrical connector.

What should I do if my radiator fan is not turned on?

When installing an auxiliary fan or simply wiring the factory fan so that the driver can manually turn the fan on and off, make sure the fan is turning in the right direction. If the fan is not turning in the right direction, air will be blown away from the radiator, and will not help to cool the radiator.

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?).

1.Has the Cooling Fan Actually Failed? 1 If the fan comes on when the AC is running at MAX, but doesn’t run when the engine is hot, check the temperature sensor… 2 If the fan fails to come on, first check for a fan blown fuse or triggered breaker. On older vehicle models, you may… More …


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.

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.

What are the symptoms of a bad cooling fan relay?

1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.

Why does the fuse keep blowing on my air conditioner?

The most common cause of the problem you are having is a defective A/C clutch relay. Which is why the fuse keeps blowing. The relay is located in the auxiliary relay box #1 (see diagram below).

What happens if the fan on my car fails?

So, a fan failure or a failure of the fan relay or control circuit is bad news. Because, it can allow the engine to overheat. On applications that have variable fan speeds; the engine may also overheat, if the fan speed fails to increase when additional cooling is needed.

Why does my Fuse for the radiator fan keep blowing?

BUT, if there is a short circuit before the fan, it will blow the fuse. Check the wiring is not chaffed or worn between fuse box and fan, or switch to fan. Unplug the radiator fan, replace the fuse and see if it blows again. If not, then its likely the radiator fan is shorted. Use an ohm meter and see what the resistance is.

1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.

There’s many reasons why a cooling fan could stop working, such as a bad sensor, relay, fuse and more. DIY car repair with Scotty Kilmer, an auto mechanic for the last 42 years. 1. Bluetooth Scan Tool: http://amzn.to/2nfvmaD 2. Cheap Scan Tool: https://amzn.to/2D8Tvae 3. Professional Socket Set: http://amzn.to/2Bzmccg 4.

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?

Here you will find fuse box diagrams of Chevrolet Cavalier 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

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.

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.

When a radiator fan works it usually makes a whirring sound that is easily noticeable. However, the radiator fan does not always start spinning on ignition. The ECU signals the radiator fan to work at the precise time. So, do not worry if the fan doesn’t immediately start working. Visually check the fan if you don’t hear its noise. 1. Broken Fuse

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.

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.

The cooling fan relay is the relay that controls the engine’s cooling fans. When the correct parameters are met, a temperature switch or the computer will activate the relay, which will allow power to the fans. The relay will usually be activated once it is detected that the vehicle’s temperature…

When do you turn on the fan relay?

When the correct parameters are met, a temperature switch or the computer will activate the relay, which will allow power to the fans. The relay will usually be activated once it is detected that the vehicle’s temperature approaches excessively high temperatures.

How do you turn off a radiator fan?

The fan can also be turned off manually when cruising to extend the life of the fan. Install the inside toggle switch where convenient. Remove the radiator fan relay from the fuse and relay box on the fender well.

How do you test a radiator fan relay?

Install the inside toggle switch where convenient. Remove the radiator fan relay from the fuse and relay box on the fender well. Test the relay terminals for power with the ignition key off (use the voltmeter). There will be one terminal that has power with the key off. Mark this terminal on a piece of paper so it can be used later.

The fan can also be turned off manually when cruising to extend the life of the fan. Install the inside toggle switch where convenient. Remove the radiator fan relay from the fuse and relay box on the fender well.

Install the inside toggle switch where convenient. Remove the radiator fan relay from the fuse and relay box on the fender well. Test the relay terminals for power with the ignition key off (use the voltmeter). There will be one terminal that has power with the key off. Mark this terminal on a piece of paper so it can be used later.

What to do if your cooling fan won’t turn on?

Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor.

Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor.

What to do if your radiator cooling fan Wont Stop Running?

Remove the lid. Look on the inside of the lid and for the mapping of the fuses and relays with their location. Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off.

Why is my computer cooling fan not working?

A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor. The relay, however, has direct power to one side, the same as a light switch.

When is the p0480 Chevrolet cooling fan relay control circuit detected?

Most auto repairs shops charge between $75 and $150 per hour. When is the P0480 CHEVROLET code detected? The P0480 code is detected when the Powertrain Control Module (PCM) detects that the commanded state of the driver and the actual state of the control circuit do not match. P0480 CHEVROLET Possible Symptoms

When does the cooling fan relay go on?

The cooling fan relay will be commanded ON when the following conditions are met: – The engine coolant temperature reaches 106°C (223°F) or more. – The A/C clutch requested. – The vehicle speed is less than 38 MPH. – The engine coolant temperature is 151°C (304°F) or more.

When was the third generation Chevy Cavalier made?

In this article, we consider the third-generation Chevrolet Cavalier, produced from 1995 to 2005.

This is what we call a blown fuse. A blown fuse is no big deal, and changing one does not cost a lot of money. If your car’s radiator fan is non-functional, check your car’s user manual and locate the fuse for the radiator fan controller or the fan.

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?).

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 does my AC fan only work on high?

If your speed selector for your AC or Heat only works on high, or low, or if its missing any particular speed, this video will show you how to fix it once and for all. This is a fix for 2nd generation Dodge Rams (1994-2001-2002 2500/3500) Loading…

If your speed selector for your AC or Heat only works on high, or low, or if its missing any particular speed, this video will show you how to fix it once and for all. This is a fix for 2nd generation Dodge Rams (1994-2001-2002 2500/3500) Loading…

1996 Chevy Cavalier 2.2 lt engine. Today i found, Cooling fan does not turn on even after reaching operating temperature.Engine overheats when idling. It does not turn on, when A/C is turned on ( I realized AC is also not working on my car, it may be related or not).

What should I do if my car cooling fan is not working?

On many modern vehicles, if you want to confirm whether your cooling fan is in working order, you can start the engine and let it idle. Set your air conditioning to the MAX setting and turn it on. The cooling fan should come on immediately or within the next couple of minutes.

How do you remove an engine from a Cavalier?

Loosen the clamps on the upper and lower radiator hoses at the engine. Remove the hoses from the engine, then tuck them under the frame or behind the radiator to keep them out of the way. Remove the fuel feed and return lines from the engine, using the appropriate line wrench. Remove the coolant pipe assembly, using the appropriate wrench.

How do you remove coolant tank from Cavalier?

Rotate the pulley toward the center of the engine to loosen tension on the belt. Lift the belt off of the pulleys. Loosen the clamp on the coolant overflow tank, using the screwdriver, then unbolt and remove the overflow tank, using the appropriate socket.

How do you remove fuel pump from Cavalier?

Lift the cover, and using the diagram on the underside of the cover, locate the fuel pump relay. Remove the fuel pump relay — you should be able to pull it out with your fingers. Start the car and let it run until it stalls. If the car won’t start, turn it over five or six times to relieve the pressure in the fuel system.

In this article, we consider the third-generation Chevrolet Cavalier, produced from 1995 to 2005.

Remove the lid. Look on the inside of the lid and for the mapping of the fuses and relays with their location. Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off.

A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor. The relay, however, has direct power to one side, the same as a light switch.

Why does my car’s cooling fan keep coming on?

Answer: Usually, a problem with a relay or module in the circuit would cause the cooling fan to stay on. If you already replaced the relay, check the module, if your model has one. You may need to locate a grounded wire in the circuit.

Why does the radiator fan not come on when the AC is on?

In order for the AC Condensor to do its job it must stay as cool as it can. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem.

Is there a nostalgic AC kit for a Chevy?

Nostalgic AC Parts offers a Complete Chevy AC Kit line that covers most Chevrolet Cars and Trucks 1987 or older. Our Chevrolet kits allow you to use existing Factory Controls (Controls need to be sent to us for the necessary modifications) or use our Controls (Cable or Electric).