Replace Fan Relay but still Radiator cooling fans not working?

Radiator cooling fans runs when engine over heats and temperature gauge rises.
Verify that the fans work by unplugging them and run jumper wires to the fan(s) from the battery, and not from the other fan or anywhere else. If they run, your problem lies elsewhere. If either does not run, it's the motor.
The PCM commands Low Speed Fans ON under the following conditions:
• The engine coolant temperature exceeds approximately 106°C (223°F). • The A/C refrigerant pressure exceeds 1310 kPa (190 psi). • The vehicle is shut off when the engine coolant temperature is greater than 140°C (284°F) and system voltage is more than 12 volts. The fans will stay ON for approximately 3 minutes. The PCM commands High Speed Fans on under the following conditions:
• The engine coolant temperature reaches 110°C (230°F). • The A/C refrigerant pressure exceeds 1655 kPa (240 psi). • When certain DTCs set. The primary fan (Fan#1) is protected by a 30amp fuse and the secondary fan (Fan#2) has 15 amp. So it's not surprising the secondary fan fuse blew when you connected the primary fan on the secondary connector. On a V6 engine, there is additional ground fuse (30amp) for the secondary fan circuit, also at the underhood fuse block.
The information above shows the two modes of operation of the cooling fans, as to when they should work, so that you may have better understanding. Since you have changed all the 3 cooling fan relays, you should also check the fuses, the power, ground, and the condition of the fan connectors.
The Powertrain Control Module (PCM) controls the on and off of the relays, depending on the inputs provided by the engine coolant sensor (ECT) and a/c pressure sensor.
At low speed mode (106degC), Fan#1 relay clicks on, and both fans will work at low speed. In case one of the fans is defective, the other will not spin as well. If left on this condition, naturally the engine will get hotter, until it reaches 110degC which will be the high speed turn-on point.
At high speed mode, the other 2 relays will also click on. This time each fan motor will receive full 12v power and expected to roar at high speed.
The condition of the coolant, the ECT sensor, and the PCM itself plays an important role in the proper operation of the cooling fans. A faulty ECT sensor will not give the proper signals to the PCM, and a faulty PCM may not give the required control signals that it's programmed to be.
In case of an ECT or PCM issues, a scan tool can effectively monitor the signals coming from this components. As for the rest of the circuit, you can check it the usual conventional method.

This details will help you.

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If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

For more radiator, repairs and solutions, check the list mentioned below: ----

HOW TO REPLACE AN UPPER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-upper-radiator-hose.html

HOW TO REPLACE A LOWER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-lower-radiator-hose.html

How to replace Radiator on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-acura-car.html

How to flush cars radiator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-flush-cars-radiator.html

HOW TO PRESSURE TEST A RADIATOR AND CAP

http://schematicsdiagram.blogspot.com/2011/07/how-to-pressure-test-radiator-and-cap.html

HOW TO REPLACE A RADIATOR

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator.html

HOW TO REPLACE A RADIATOR SUPPORT

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator-support.html

Transmission fluid gets into radiator?

http://schematicsdiagram.blogspot.com/2011/12/transmission-fluid-gets-into-radiator.html

The plastic housing which goes to the upper radiator hose is cracked and leaking?

http://schematicsdiagram.blogspot.com/2011/12/plastic-housing-which-goes-to-upper.html

Where Is Radiator Fan relay and Fuse Located on 2004 GMC Envoy?

http://schematicsdiagram.blogspot.com/2011/12/where-is-radiator-fan-relay-and-fuse.html

How to Replace Engine cooling Fan on Audi A4?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-engine-cooling-fan-on.html

Engine cooling fans running, but AC compressor will not run?

http://howtobyme.blogspot.com/2011/12/engine-cooling-fans-runningbut-ac.html

Water shoots out of overflow pipe on Ford Truck?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.



Basically its not the thermostat problem,but still first inspect the thermostat and confirm.
That usually signifies that your cooling system is overheated or over-pressurized.
1. You may have a head gasket leak that is pressurizing the system.
2. Possibly an air lock in the system that is causing it to overheat and over pressurize the system.
3. Or like you said the water pump is not circulating the water and the engine is overheating and over pressurizing the system.
You wouldn't always have a noticable amount of oil in the water from a blown head gasket.
Sometimes you can see air bubbles/foam if you have the radiator cap off and the engine is warm enough to open the thermostat and circulate the water. Lisle makes a Combustion Leak Detector.You can buy one from them.
To check for and air lock you need to find the highest point in the cooling system and try to bleed off any air that is trapped. Usually this point is the radiator cap and if it is then you probably do not have an air lock. BUT, on some vehicles the radiator cap is not the highest point. Those vehicles are usually supplied with a specific air bleed located on top of the engine. They are usually labeled with instructions.

A water pump can have a broken or coroded impeller making the coolant flow too slowly to carry the BTU's that needs to carried off. This usually would allow the user to operate the vehicle for the normal amount of time it would take to reach thermostat opening tempurature, so if it builds presure too quickly or overheats very quickly this may not be the problem. The normal amount of coolant flow through the system depends of the speed of the waterpump at that time, and the position of the thermostat. An egine turning 3000 and a thermostat wide open would produce a flow of about 2 - 3 quarts per 10 seconds. More for larger engines like, say, a v-10 viper.
Or there may be too many BTU's for the system to contend with, like for example, a leaking cylinder head gasket, cracked head/block or something like that which would allow very hot combustion gasses to enter the coolant stream adding huge BTU values to the system as well as increasng the coolant internal presures forcing the radiator cap to "pop" and relieve the system presure into the overflow bottle. In essence, a leaking headgasket acts like a cutting torch shooting hot combustion gasses into the coolant. The amount of time it takes for the system to overpresurize or over heat is a good indicator of coolant being exposed to combustion gasses. The cooling system can be checked for combustion gasses.
Or perhaps the heat being carried is not being effectively removed from the coolant. A radiator can become "sludged" up with stuff and litterally not be able to cool the coolant in the amount of time that the coolant is in the radiator. Sometimes a coolnt flush can help this, but it is only temporary. If the engine is normally producing, say, 250,000 BTU's per minute then the radiator must be able to carry at least twice that amount away durring heat exchanging.
This are few clarifying questions to help you to find the problem.
How long can you run the engine before it either overheats or starts overflowing the coolant?
Does the system presure increase very much when the engine is first started cold?
Is the radiator cap relieving the presure at the specified value?
Do the radiator fans work when needed? If the engine overheats rapidly when started I don't think the fans are an issue unless that is why the engine overheated in the first place taking out the head-gaskets.

Following this basic procedure will help you to confirm the problem.
Thanks.

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For more help,regarding such problems,check the list mentioned below:----

The plastic housing which goes to the upper radiator hose is cracked and leaking?

http://schematicsdiagram.blogspot.com/2011/12/plastic-housing-which-goes-to-upper.html

For more radiator, repairs and solutions, check the list mentioned below: ----

HOW TO REPLACE AN UPPER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-upper-radiator-hose.html

HOW TO REPLACE A LOWER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-lower-radiator-hose.html

How to replace Radiator on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-acura-car.html

How to flush cars radiator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-flush-cars-radiator.html

HOW TO PRESSURE TEST A RADIATOR AND CAP

http://schematicsdiagram.blogspot.com/2011/07/how-to-pressure-test-radiator-and-cap.html

HOW TO REPLACE A RADIATOR

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator.html

HOW TO REPLACE A RADIATOR SUPPORT

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator-support.html

THERMOSTAT

How to replace Thermostat on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-thermostat-on-acura-car.html

Where is thermostat located on 2006 dodge magnum 3.5L?//

http://repairhelpcenter.blogspot.com/2011/10/where-is-thermostat-located-on-2006.html

Thermostat on AUDI 1.9 TDI?

http://repairhelpcenter.blogspot.com/2011/10/thermostat-on-audi-19-tdi.html

How to replace Radiator on Audi and VW car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-audi-and-vw.html

How to Replace a Thermostat.

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-thermostat.html

The plastic housing which goes to the upper radiator hose is cracked and leaking?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

Basically the leak is noticed from water outlet and thermostat housing.
But the outlet which is most likely to fail is the water outlet. It is not the thermostat housing. The thermostat is located on the left side of the engine block. This part is commonly a component that fails. It is also the most missunderstood component to techs that have never seen one, and invariably will tell you incorrectly that it is the thermostat housing. 
SEE THE IMAGE BELOW TO CONFIRM HOW THIS PART LOOKS :---


This is called the water outlet housing or coolant air bleeder. It may be mistaken as the thermostat housing when indeed the thermostat housing is at the lower hose on these engines . Dorman Products makes an aftermarket replacement however I always do recommend an original replacement part from the dealer . To replace first make sure engine is cold then drain coolant, disconnect upper hose at the housing. Next you may have to loosen and lift the intake plenum to gain access to the rear bolts of the housing. This does require some special skills as there are usually support brackets in the rear of the plenum that connect to block or cylinder head. Once removed you must thoroughly clean the surface with a scraper and then a fine sandpaper. Last ,be sure to properly fill and bleed your cooling system . This is a very common problem with Dodge cars and Trucks.

This details will help.Thanks.

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For more radiator,heater hose and other engine repairs and solutions,check the list mentioned below:----

How to Replace an Upper Radiator Hose

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-upper-radiator-hose.html

How to Replace a Lower Radiator Hose

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-lower-radiator-hose.html

How to replace Radiator on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-acura-car.html

How to replace Thermostat on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-thermostat-on-acura-car.html

Where is thermostat located on 2006 dodge magnum 3.5L?//

http://repairhelpcenter.blogspot.com/2011/10/where-is-thermostat-located-on-2006.html

Thermostat on AUDI 1.9 TDI?

http://repairhelpcenter.blogspot.com/2011/10/thermostat-on-audi-19-tdi.html

How to replace Radiator on Audi and VW car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-audi-and-vw.html

How to flush cars radiator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-flush-cars-radiator.html

How to Pressure Test a Radiator and Cap

http://schematicsdiagram.blogspot.com/2011/07/how-to-pressure-test-radiator-and-cap.html

How to Replace Heater Core Hoses

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-heater-core-hoses.html

How to Replace a Thermostat.

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-thermostat.html

How to Replace a Radiator

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator.html

How to Replace a Radiator Support

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator-support.html

Low coolant warning light on Buick Riviera?

This is indication of low coolant.First check the coolant level.If its low then it has to be replaced.But if coolant is full then coolant level sensor is faulty and needs to be replaced.
The low coolant sensor usually plugs into the radiator or the coolant container.Replacing the sensor should help.

Thanks.

Car AC Blows Warm Air ?

http://technoanswers.blogspot.com/2011/10/car-ac-blows-warm-air.html

How to test AUTO AC pressure?

http://howtobyme.blogspot.com/2011/10/how-to-test-auto-ac-pressure.html

AUTO Air Conditioning Troubleshooting?

http://technoanswers.blogspot.com/2011/10/auto-air-conditioning-troubleshooting.html

AUTO A/C COOLING PROBLEM?

http://technoanswers.blogspot.com/2011/10/auto-ac-cooling-problem.html

Fixing refrigerant leak?

http://howtobyme.blogspot.com/2011/10/how-to-fix-refrigerant-leak.html

How to locate Car AC Refrigerant leak?

http://technoanswers.blogspot.com/2011/10/how-to-locate-car-ac-refrigerant-leak.html

CAR AC INTERMITTENT COOLING?

http://technoanswers.blogspot.com/2011/10/car-ac-intermittent-cooling.html

What causes INTERMITTENT COOLING on Car AC system?

http://technoanswers.blogspot.com/2011/10/what-causes-intermittent-cooling-on-car.html

Car AC making Noise?

http://technoanswers.blogspot.com/2011/10/car-ac-making-noise.html

BAD ODOR ON CAR AIR CONDITIONER?

http://technoanswers.blogspot.com/2011/10/bad-odor-on-car-air-conditioner.html

How to Recharge Car's Air Conditioner

http://repairhelpcenter.blogspot.com/2011/10/how-to-recharge-cars-air-conditioner.html