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Re: cooling fans will not come on
Are you sure they are not coming on at all. If the motor is running properly and not over heating they have no reason to come on. Does it over heat? If not why would they need to be on at all. When a motor is well tuned and maintained there is very rare occasion for the fans to add extra cooling.
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The reason that you drive and engine cools down is that cool wind is blowing in the grille in front of the car and when you stop, that natural wind stops cooling it down.
First check the fan fuse. If it is OK check the fan itself: just apply wires on the connector of the fan and attache it to the battery (dont mix "+" and "-") If fan will not start, replace the fan motor. If it starts check for the Fan Motor Relay
Hi Naomi , there is a lot involved in the control of the cooling fans on your vehicle ! There are three fuse's , three relays an a fan control unit !
1. radiator fan main relay , located in underhood relay box A
2.condenser fan relay , located in underhood relay box A
3.radiator fan relay , located in underhood relay box C
4.Cooling fan fuse # 47 20amp. underhood fuse / relay box
5.condenser fan fuse # 50 20amp in underhood fuse / relay box.
Any one of these could cause them to not work, rather then just replacing parts an wasting money you should take it to the repair shop !
The easiest way to tell if the fans work is to put your AC on max, even if it does not work, both your fans should turn on as long as the vehicle is running. if they do not turn on, check the fuses first, then the fan relays, you can usually swap the horn relay to see if they come on, if you still do not see the fans working, they may need to be replaced, the thermal switch is bypassed while the AC is on max so if the fans come on then, but not when engine gets hot, it may require replacement,
note: if both fans work during ac max operation all the fuses and relays in there circuit are working and need no attention
Find and remove the cooling fan relay and and replace it with a another relay. If the fan stops working while the vehicle is off replace the relay. It it possible that the relay stayed latched on allowing it to work even though the vehicle is off.
The fan is powered by multiple control points. The first thing to check is fuse for cooling fans. If fuse is good then check the fan relay(s). After making sure those 2 items are good then check temperature sensor on the engine. Those are the main items that control cooling fans. Some vehicles are also controlled through the ECM.
I would first check the fan relays make sure they are good ..If no problem there then i would disconnect the wires going to the cooling fan..turn on your a/c ..that should activate the fan even if the vehicles cold ..see if you have voltage across the wires plug the meter right into the wire you should have 12 volts..if you do then its the fan..if the fan comes on during a/c but dont come when vehicle gets hot,then its probably the temperature senser that tells the fan to come on..Its located near the thermostat.
The fans come on only when hot or the AC is on. There are many fuses that have to be good for it to work. The fan relay should have 2 pins hot with the key on, The other 2 should be ground. with the key off one should be hot and the other can then be ground the other pins that are ground one of them is the fan. the other becomes ground when the computer turns the fans on. If you don't have a pin thats hot at the relay all the time then theres a blown fuse or even the power wire from the battery at the battery