Ford taurus fan problems.....When I was driving the one fan worked fine but the air conditioner fan that kicks on when used, It would not work...... Now I get home and look at it and I test it motor and fuse and everything is good but I drive againg now both fans wont work......Tester says fuse is fine and motor fine also......What do I do....Freon is fine also

What have you checked so far ?
Radiator full of coolant ? Heater hoses getting hot ?

This Car is known for Cooling fan Control Modules To Go Bad! I the fan by the rad coming on when A/C is working? If it does not then that is your problem.

check the relay(s), it may have bad contacts, there is more than one as you radiator fan should turn on when the AC clutch is activated. you'll need a VOM (Volt Ohm Meter) and a power source to check. there should be a diagram on the relay showing the pin connections for coil, common, and outputs. run continuity checks from common to outputs.

(you say it works great when jumped, so iam guessing that its not a too low or too high on freon)

It may just be time to replace the blower motor or the blower resister. The brushes in the fan motor assembly may be worn and not making very good contact. Using a test light at the connection at the fan motor harness is a good way to see if you're getting power to the motor when requested, if so, it is time to replace the blower fan assembly.

the cooling fan that comes on when the AC is turned on isnt working

Check the coolant temperature with the car stopped. At idle with the hood up keep the thermometer in the coolant. Confirm if the coolant is not overheating but the engine is!!

Run the A/C keeping the thermometer in the coolant and allow the fan to kick on.

If with the A/C on the engine doesn't overheat then it confirms that the low speed on the fan motor is not working. Read the description of the Taurus where the low speed is used for normal operation when temperature is required but the high speed is activated when the A/C is on. The circuit is simple.

In your case the low speed has to be activated for the A/C to go into the high speed. The fact that the high speed is working and low speed is not indicates the low speed of the fan is defective.

Other problems such as the thermostat or plugged cooling system(radiator clogged) could be the root problem!

Hope this helps?

yes there is a blend air door that mixes a/c with the heated air and it sounds like it is out of adjustment the other thing is the heater core could be plugged

make sure both hose are hot meaning there is flow and is not plugged

could be many things such as a leak in the a/c system, blend door/motor, clogged orphus tube, or an electrical problem in the a/c circut- i usually recomend that a/c work be handled by the professionals due to health hazards and most people don't have the right tools to do the job.

what you need to do is check that your relays are OK
in some cars you cannot see through the relay like a fuse
the only way to check if it is the relays is by replacing them
if this dose not work and you have a electronic climate control system your controm box may be burnt out this will need replacing