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AMEDEE
AMEDEE, FORD TECHNICIAN
Category: Ford
Satisfied Customers: 21851
Experience:  ASE MASTER TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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hi i have a 2002 taurus the radiator fans will not come on

Customer Question

hi i have a 2002 taurus the radiator fans will not come on i changed both temp sensors checked fans and relays witch are good any thoughts thank you not even when the ac is on
Submitted: 4 years ago.
Category: Ford
Expert:  AMEDEE replied 4 years ago.

Hello!

 

I would recommend to check for power going into both the high and low speed fan relays. I believe power comes into these relays via red wire. If there is power to these relays, I would recommend to check to see if these relays activate and power up the fans by grounding the light green and violet wire coming into the relays from the computer.

Customer: replied 4 years ago.
tried that fans work replaced relays and the still do not come on not even when ac is on
Expert:  AMEDEE replied 4 years ago.
DOes the fan relay relays have power to them with the key on?
Customer: replied 4 years ago.
yes they do
Expert:  AMEDEE replied 4 years ago.
Do they engage or click when you turn the AC on?
Customer: replied 4 years ago.
yes they do
Expert:  AMEDEE replied 4 years ago.

SO if this is the case, then we simply have a break in the wiring from the relay to the fans.

 

DO you need a diagram?

Customer: replied 4 years ago.
there are two wires in the plug that go to the coolant temp sensor is one supposed to be live
Expert:  AMEDEE replied 4 years ago.
I believe one if them should have 5 volts.
Customer: replied 4 years ago.
what do think the chances are that tha computer is the problem
Expert:  AMEDEE replied 4 years ago.
If the relays are clicking, then the computer is good.
Expert:  AMEDEE replied 4 years ago.
Did you have any further questions?
Expert:  AMEDEE replied 4 years ago.

Would you like a wiring diagram?

 

Does this make sense? If not, please let me know.

Customer: replied 4 years ago.
yes you mentioned a diagram is it possible to see it
Expert:  AMEDEE replied 4 years ago.

Here you go.

 

graphic

Customer: replied 4 years ago.
all my other cars if you unplug the temp senser the fans come on should they in this car also
Expert:  AMEDEE replied 4 years ago.
YEs... I believe so. But I am not positive.
Customer: replied 4 years ago.
would a bad cooling fan resister shut down the fans
Expert:  AMEDEE replied 4 years ago.
YES... I do believe its possible!

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