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No power to cooling fans on 95 intrepid [tested the fans w/relay to battery they are working] but when correctly installed the fans aren't working what can i do to fix problem what could the prob be?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 11 Answers

SOURCE: 95 mustang

hi the temp" sender "in this case is a thermostatic switch normaly with 2 connections put an ohm meter across the connections when engine is cold it will show nill or full scale leave meter connected run motor up untill it is hot meter needle should have moved 1 way or the other if it did not the relay is at fault chris merlinv12

Posted on Jul 11, 2008

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leetamara
  • 702 Answers

SOURCE: Cooling fan wont work

The water temp sensor is located near the thermostat housing. This sensor is what tells the ECM to turn the fan on/off. The water temp sending unit is located near the same area. You know you have the correct sensor is because the water temp sensor has a 2 prong plug. The water temp sending unit only has 1 prong.

Posted on Sep 27, 2008

  • 76 Answers

SOURCE: cooling fan relay 1998 neon

on the left(driver's) side of the lower rad support. It's a small flat relay with a plug on the bottom and usually has a blue colored front. held on by two screws. Also, there may be more rad fan relays in the underhood fuse/relay box.
Good luck.
R

Posted on Feb 27, 2009

localwonder
  • 6784 Answers

SOURCE: cooling fan won't come on.

HI. I have prepared some steps for you to follow.This will aid you will the troubleshooting.


Step1 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. Step2 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. Step3 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. Step4 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. Step5 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. Step6 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. Step7 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.

Please rate and god bless..

Posted on Mar 21, 2009

  • 84 Answers

SOURCE: cannot find cooling fan relay

check the owers manual for location usualy in the main electrical box under the hood. they are just a pull out plug with 4 prongs some times 5 pull straight back youll b fine

Posted on Apr 28, 2009

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1 Answer

Where is the fuse for the cooling fan on a 94 cavalierz24


There is a fusible link which supplies power through the cooling fan relay . the fusible link you want, plus four others are located on the battery cable terminal on the starter solenoid ! the one you want is blue . There are two gray an two more colored rust . Do you know where the cooling fan relay is ? In the under hood fuse / relay box. On the side of the relay should be a diagram , or on the bottom it should be marked 30,87, 85,86 .If you find pin 30 at the relay socket an test with volt meter it should read battery voltage. If not take the fusible links off the starter an with ohm meter test fusible link end to pin 30 at relay socket .If open or shows OL you have a open circuit ! First I would try jumping battery power to the fan it self . These fans do ware out ! Radiator Cooling Fan Motor How to Test and Replace

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2004 Venture Chevrolet minivan cooling fan circut


Are you talking about the radiator fan? How hot does the engine get in degrees F? Some makes and models, the radiator fan won't turn on till about 220 degrees F. Check for applicable trouble codes, see if any code that refers to the radiator fan circuit or coolant temp sensor? Some of the national brand auto stores will check codes for free.

Of course, as far as overheating in general, you have the thermostat--water pump and other possible issues. Are you losing coolant?

Dec 14, 2014 | Chevrolet Cars & Trucks

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How do I know my cooling fans are working


There a a few tests you can conduct here. Firstly, put power directly to your fan(s) Run two new wires directly from the battery to the + and - of the fan motor. Be careful doing this, as there is a risk of shorting the battery to earth. Maybe connect up the fan end before touching the wires onto the battery terminals. This will prove if your fans actually work. They should spin up to speed. Next, test the fan thermostat. There should be a terminal connection somewhere. One side of the fan wires would be connected to the thermostat. You will likely need a voltmeter to do this test. The thermostat is just a switch that should operate after a certain temperature is reached. Normally you would have to remove the thermostat from the car engine to test it, but it might be possible to test it when it's still installed. Next, test or replace the radiator thermostat. If coolant is unable to flow through the radiator after the engine warms up, you will get overheating. After a short warmup period, the radiator thermostat should open and allow coolant to flow through the engine block. Next, when the engine is running, check the exhaust pipe for water. Some water might be normal, until the engine is hot, but if a lot of water is evident, then maybe the block has been cracked. Best test for that is a cylinder compression test, with a compression gauge. Lastly, please do something positive about this. There is a great danger you will crack the engine block, especially if you are adding cold water/coolant to a very hot engine. Remember: does the fan run off direct power? Is the fan thermostat switching correctly? Does the radiator thermostat work correctly? Is the water pump working correctly? Hope this helps. Regards,

Oct 06, 2014 | 1999 Oldsmobile Cutlass

1 Answer

How can i test to see if my fan on my 99 intrepid works.It over heats.


Had an issue on my 98 Voyager with the cooling fan not working,noticed this on the test drive after changing the crankshaft and bearings(probably already broken).There was a relay for the cooling fan on the radiator support (not in the relay center).You might have a similar setup,but regardless,the fan IS on a relay somewhere.The relay socket will have all the test points necessary to diagnose the fan.The 2 largest conductors will be 12v in and the 12v feed to the fan.Jumper these 2 large conductors and the fan should run.If it does,then look for a ground to the relay,and also verify a few volts or switched ground from the PCM when the A/Cis on.

May 04, 2012 | Dodge Intrepid Cars & Trucks

1 Answer

Cooling fans wont come on


Have you replaced the relays for the radiator fans? They are located in a box near the battery. All of the relays are the same(like a 20 amp fuse) so you can test the relay by moving them around. Try using the cruise control relay in its place and see if it comes on.

Feb 26, 2011 | 1997 Dodge Intrepid

1 Answer

How to change the radiator fan?


Electric Engine Fan - Fan Switch

Removal & Installation
2.7L Engine
  1. Disconnect negative battery cable.
  2. Partially drain cooling system.
  3. Disconnect the electrical connector .
  4. Remove engine coolant sensor from coolant outlet tube .
To install:
  1. Apply thread sealant to sensor threads.
  2. Install engine coolant temperature sensor into coolant outlet tube.
  3. Tighten sensor to 20 ft. lbs.(28 Nm) torque.
  4. Connect electrical connector to engine coolant temperature sensor .

3.2L And 3.5L Engines
  1. Disconnect negative battery cable.
  2. Partially drain cooling system.
  3. With the engine cold, disconnect coolant sensor electrical connector.
  4. Remove sensor.
To install:
  1. Install engine coolant temperature sensor.
  2. Tighten sensor to 20 ft. lbs.(28 Nm) torque.
  3. Attach electrical connector to sensor.
  4. Connect negative battery cable.
Removal & Installation
  1. Disconnect negative battery cable.
  2. Partially drain cooling system.
  3. Remove upper radiator hose.
  4. Disconnect cooling fan electrical connector.
  5. Remove cooling fan mounting bolts.
  6. Remove radiator cooling fan assembly from vehicle.

    f9d971c.jpg
    Fig. Removal and installation of the radiator fan-2.7L Engine shown
To install:
  1. Position radiator cooling fan assembly in vehicle.
  2. Install cooling fan mounting bolts. Tighten to 50 inch lbs. (6 Nm)
  3. Connect cooling fan electrical connector.
  4. Install upper radiator hose .
  5. Fill cooling system.
  6. Operate engine until it reaches normal operating temperature.
  7. Check cooling system and automatic transmission for correct fluid levels.

Hope helps (remember comment and rated this).

Jul 13, 2010 | 2001 Dodge Intrepid

2 Answers

Electric Radiator Fan Does Not Come On


Chevy dealer says will not come on until temperature reaches 219 f

May 16, 2010 | 2007 Chevrolet Silverado 1500 2WD

1 Answer

Where is the switch that cuts on the cooling fans on a 2000 grand am with a 3.4 engine


The computer turns on the fan. Based on sensors from the motor.
DTC P0480 - COOLING FAN CIRCUIT

Circuit Description

The cooling fan is controlled by PCM through the fan relay based on inputs from ECT sensor, IAT sensor, A/C selector switch, A/C refrigerant pressure switch and vehicle speed sensor. PCM controls cooling fan by grounding cooling fan control circuit which turns on cooling fan relay.

The fan relay will be commanded on when ECT reaches 223°F (106°C) or greater, A/C is requested or vehicle speed is less than 38 MPH. Cooling fan relay will also be commanded on regardless of vehicle speed when a DTC is set requesting cooling fan to be on, ECT is 304°F (151°C) or greater, or A/C refrigerant pressure is high. Cooling fan may also be commanded on when engine is not running, on certain conditions.

Conditions for setting DTC:

Battery voltage greater than 9.5 volts.

Cooling fan fault line detects a malfunction for 6 seconds.

1. Check cooling system. Ensure coolant level and belt tension are correct. Adjust/repair as necessary. After repairs, go to step 23). If no adjustment or repairs were required, go to next step.

2. Turn ignition on, with engine off. Using scan tool, check if cooling fan is operating with ECT at less than 209°F (98°C). If cooling fan is off, go to next step. If cooling fan is on, go to step 4).

3. Command cooling fan relay on. If cooling fan operates, go to step 23). If cooling fan does not operate, go to step 5).

4. Turn ignition off. Disconnect PCM harness connector. If cooling fan turns off, go to step 23). If cooling fan does not turn off, go to step 6).

5. Disconnect cooling fan relay harness connector. Using a test light connected to ground, probe battery feed circuits in relay harness connector. If test light illuminates on both terminals, go to step 7). If test light does not illuminate on both terminals, go to step icon_cool.gif.

6. Disconnect cooling fan relay harness connector. With test light connected to ground, probe battery feed circuit in relay harness connector. If test light illuminates, go to step 9). If test light does not illuminate, go to step 10).

7. Connect a jumper wire between cooling fan relay battery feed and cooling fan battery feed circuit. If cooling fan operates, go to step 11). If cooling fan does not operate, go to step 12).

8. Repair open in battery feed circuit. After repairs, go to step 23).

9. Repair short to voltage in cooling fan battery feed circuit. After repairs, go to step 23).

10. Connect test light battery voltage and probe cooling fan control circuit. If test light illuminates, go to step 13). If test light does not illuminate, go to step 21).

11. Connect test light to battery voltage and probe cooling fan control circuit. Using scan tool, command cooling fan on. If test light illuminates, go to step 14). If test light does not illuminate, go to step 15).

12. With jumper wire still connected, disconnect cooling fan harness connector. Using test light connected to ground, probe cooling fan battery feed circuit. If test light illuminates, go to step 16). If test light does not illuminate, go to step 17).

13. Repair short to ground in cooling fan control circuit. After repairs, go to step 23).

14. Check terminals to cooling fan relay. Repair as necessary. After repairs, go to step 23). If terminals are okay, go to step 21).

15. Check cooling fan control circuit for open or poor connection. Repair as necessary. After repairs, go to step 23). If circuit or connection is okay, go to step 22).

16. Connect test light to battery voltage and probe cooling fan ground circuit. If test light illuminates, go to step 1icon_cool.gif. If test light does not illuminate, go to step 19).

17. Repair open or poor connection in cooling fan ignition feed circuit. After repairs, go to step 23).

18. Check for poor connections at cooling fan harness connector. Repair as necessary. After repairs, go to step 23). If connections are okay, go to step 20).

19. Repair open or poor connection in cooling fan ground circuit. After repairs, go to step 23).

20. Replace cooling fan motor. After replacing cooling and motor, go step 23).

21. Replace cooling fan relay. After replacing relay, go to step 23).

22. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.

23. Turn ignition on, with engine off. Command cooling fan on. If cooling fan operates, system is okay. If cooling fan does not operate, repeat step 1).

May 16, 2010 | 2000 Pontiac Grand Am GT

1 Answer

Radiator cooling fan doesn't come on.


first unplug the cooling fan at its plug and supply 12v to the fan if it doesnt run then replace if it does run follow the power wire to the thermal water switch usualy located at the bottom of the radiator.Use test light/probe to check that you have power into the switch and when engine is hot you should have power both in and out of the switch.if not replace thermal water switch.If that is working you will need to find out why you have no power to the switch.Check that your fuse and relay is working correctly.Sometimes just pulling out the relay and putting back in will make it work due to poor contact.Also try swapping relays with others in the same box near battery to identify if relay is faulty

Oct 27, 2008 | 1990 Buick LeSabre

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