Question about 1990 Chevrolet Beretta

2 Answers

The engine is overheating and the fan doesn't appear to be operating but turns freely by hand. Is there a test point or sensor location?

Posted by on


2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Chevrolet Master
  • 12,744 Answers

Check fuses and relay than check fans with ohm meter for possible short or disconnect at fan carefully use a 12 volt jumper to feed power to fan motors if work than check sensor in cooling system for failure

Posted on Oct 05, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 713 Answers

This is the easiest way to test. Unplug the fan and direct wire to the battery and see if it comes on. If the fan comes on it is good, go to the relay center and make sure the relay is good. There should be another relay right next to it that is identical to it swap the two out and see if it comes on then when it gets hot. If it does and the item in which you swapped the relay from does not work then relay is bad replace it. Also check the cooling temperature sensor mounted near the thermostat housing if this goes out the fan will not kick on.

Posted on Oct 05, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

97 cadillac sts overheating

If everything checks out ok like coolant level and no leaks I would replace the temp sensor for the fans it should be on top and when you buy one look for it on the top of the engine and make sure the fans spin freely by hand with the key in your pocket and engine cold. If they don't spin real easy you may have to replace them.

Apr 04, 2014 | 2001 Cadillac Sts

1 Answer

I have a 2005 Buick LaSabre Custom.........neither fan will come on. I have checked the fuses and both test fine. Neither fan comes on when I turn on the A/C. Both fans spin freely when you turn them by...

Your cooling fans are computer controlled . Has three relay's , coolant temp sensor is an input to the PCM - engine computer . Training Video on youtube on GM duel fan control . How to test etc...

Jan 13, 2018 | 2005 Buick LeSabre

1 Answer

Aux fan not cutting in when o/heating 1989 190E 2.6Ltr. Fans operate when tested.

Your vehicle should have a viscous fan clutch for controlling the engine temp from overheating. The auxillary fans in front are used when the a/c is on. I would start by spinning the engine fan or viscous fan by hand when the vehicle is off. The fan should show resistance when you spin it. If it doesn't and it just free spins then the viscous fan clutch is bad. Let me know what happens when you spin the engine fan and also exactly how high does the engine temp get. Does it reach the red mark?

Feb 23, 2012 | Mercedes-Benz 190-Class Cars & Trucks

1 Answer

Why wont my dually truck start when hot

Does the engine appear to be overheating? Signs of engine overheating are :
1. Sluggish engine operation when hot.
2. Detonation upon acceleration (pinging).
3. Coolant boiling in overflow tank.
If any of these symptoms are present, then place a cooking thermometer on the upper radiator hose where it connects to the engine. Tape the thermometer to the hose to hold it in place. Run the engine until operating temperature is reached. The temperature should stay between approx. 195deg.F and 225deg.F. If it goes over 230deg.F, then overheating is indicated. Before shutting off the engine, check to see if the engine cooling fan is running. If not, then turn on the AC switch and see if it comes on. If the fan still does not turn on, then a faulty cooling fan or fan circuit is indicated. Other causes of hard/no start when hot include :
1. Dirty air filter.
2. Bad temperature sensor (computer).
3. Bad map sensor.
4. Bad EGR valve.
5. Failing ignition module.
6. Leaking injector(s)
If the vehicle is used primarily as a work vehicle, then it might be overdue for an oil change.
If the oil is fuel soaked, then it can cause an over rich mixture during hot restart.
I hope that this information is helpful and thank you for using
CAUTION : Be careful when working around a running engine. Keep hands and loose clothing away from moving engine parts and engine cooling fan.

Jun 02, 2011 | 1996 Chevrolet C/K 3500

1 Answer

Crownvictorias2006 overheating all the time

Do you think that it's overheating because the temperature light is on? If so, then it's possible that you have a bad temperature sensor and not an overheating engine.
Look for other signs of engine overheating :
1. Sluggish engine operation.
2. Detonation upon acceleration (pinging).
3. Rough, uneven engine idle.
4. Coolant boiling in overflow tank.
If your vehicle is experiencing these symptoms, then overheating is indicated. One of the most common cases of overheating is a bad thermostat. Another common problem is a faulty cooling fan or fan circuit. The cooling fan can be checked by running the engine at operating temperature and turning on the AC control. if the fan does not come on, then a problem with the fan circuit is indicated. The thermostat can be checked by placing a cooking thermometer on the motor near the upper radiator hose where it attaches to the motor. the temperature should not go above 225deg. If it does, then replace the thermostat. If the temperature stays at or below this rating, then replace the temperature sensor. I hope that this information helps you with your problem and thank you for using

WARNING : Be very careful when working around cooling systems when the engine is at operating temperature. DO NOT open the radiator cap (if equipped) or even the overflow tank cap when the system is hot. Always wear safety glasses. Remember that electric cooling fans can operate at any time, even after the engine is off. Keep hands away from fan when working in the engine compartment.

Jun 01, 2011 | 2006 Ford Crown Victoria

1 Answer

1995 chevy lumina sensor went out and fan wont turn

How did you determine that the sensor failed. Did the check engine light come on? When you say that the fan won't turn, do you mean that it won't turn on and run or that you can't physically turn it by hand. To determine this, disconnect the electrical connector to the fan and try to turn it by hand. It should turn easily. If it doesn't then it must be replaced. If it does then reconnect the electrical connector to the fan and try to operate it by disconnecting the temperature sensor lead and placing a jumper wire between the terminals of the harness. turn the AC control to AC/MAX and turn the ignition key to on. If the fan runs then the problem is the sensor. If it doesn't then check the fan control relay and any related fuses. WARNING : Use extreme caution when testing the fan circuit. Never attempt to turn the fan with the electrical connector in place. The fan can operate at any time even if the engine is off.

May 14, 2011 | 1995 Chevrolet Lumina

1 Answer

2007 Pacifica overheated. Outside Temp only 80. Doesnt appear that front fans are working and coolant level in resevior get higher.

Turn on the AC--it should start the radiator fans immediately. If nothing, check the fuse for the fans. The relay for the fans is a solid state device that is controlled directly by engine computer. The computer reads the coolant temperature sensor which tells the computer when to turn on the fans for usual cooling. Try to turn each fan manually (engine cool) and check for bad bearings, or fan blades--both fans should spin freely without any noise. If the fans come on with AC, then replace the temperature sensor which should be located near the attachment area of the upper radiator hose on the engine. It will have a single wire attached, and look like a small brass plug with threads. Watch the engine temperature for a while after the repair as the overheating may have damaged the thermostat element. Hope this helps!

Jul 01, 2010 | 2007 Chrysler Pacifica FWD New Cars

2 Answers

My 2003 Pontiac Grand AM is overheating. I have had the water pump, thermostat, and everything along with it replaced already. From what my husband can tell, the radiator fan is not coming on when it...

you need to have your car checked with a hand held computer,with this tool you can do special test like turn the cooling fans on, and with the tool you can see what temperature the computer sees,if your temperature sending unit is lying ,like if your engine is at 215 degrees and over heating, the temperature sending unit might only be telling the computer it's at 190 degrees,which the computer will not turn the fans on.and with a hand held tool you can check the fan relay which turns the fan on.or the fan motor could just need replaced,so if you do special test and turn the fans on with this tool,you can do all your testing with a test light.

Nov 15, 2009 | 2003 Pontiac Grand Am

2 Answers



May 17, 2009 | 1994 Jeep Grand Cherokee

2 Answers

99corvette overheating

Hi, I put together a guide that will help you diagnose this issue. it will help you troubleshoot all problem areas and lead you to the problem at hand.

Check for broken wires or loose connectors around the fan circuit. Inspect connectors at the fan motor, relay, sensor or heat sensitive switch, and the Electronic Control Module (ECM)--your car’s computer control system. Also, make sure to check for a possible blown fan fuse. These are common and overlooked troublesome spots that may cause a fan to fail.
Run and bring the engine to warm temperature. With the engine running, use a voltage test light to check for power to the motor fan. Be extra careful and make sure to Keep your hands and tools away from the belt, fan or any other engine moving parts. If voltage is reaching the fan motor, the test light should glow.
Turn off the engine after you see the light glow. Apply direct voltage to the fan motor from your car battery using a pair of spare wires. If the fan fails to operate, replace the fan motor. If the motor operates, your problem is in the motor connector.
Locate the heat-sensitive switch or heating sensor if the fan motor operates with direct voltage and the test light did not glow. You should find the sensor in the radiator, engine block, or thermostat housing.
Measure the resistance across the heating sensor with the multimeter. With the engine at cool temperature (engine off), it should register infinite resistance; with the engine at warm temperature (engine off), you should read low resistance. If both readings state infinite resistance install a new heating sensor, that’s the cause of your failing fan.
Check the action of the fan relay if the heating sensor is registering variable resistance. Your service manual should specify the power and ground wires according to color codes and the proper way to test it. If the fan relay fails the test replace it with a new one.
Check the connections going to the ECM after you determine the fan relay is working properly. If you find broken wires or loose connectors, make the necessary repairs. If you suspect a defective ECM take your vehicle to a service shop for a computer analysis. In most cases, the ECM is rare to be the cause of a failing fan. The above steps should take you to the root cause of your problem and help you fix the cooler fan.

  • Most automotive service manuals will show the wiring diagrams for the different electrical and electronic system components. Having the service manual for your car handy to locate components and look up specifications will make your troubleshooting task much easier.
  • A service manual can be purchased at most auto part stores. Also, most public libraries maintain an updated section of automotive service manuals that you can consult free of charge.
  • Keep your hands away from the fan, belts, or any other moving parts while working on your engine, they can easily catch and rip through your fingers, hands and arms.
  • Always wear short sleeve shirts and avoid wearing jewelry or watches while working on your car engine, especially while the engine is running. Clothes and jewelry can get trapped in moving engine parts and cause severe injury.
Please rate and have a great day:)

Apr 28, 2009 | 1999 Chevrolet Corvette

Not finding what you are looking for?
1990 Chevrolet Beretta Logo

Related Topics:

136 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

78267 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides