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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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1998 Taurus cooling fan not working, yes, only 92,000 miles

Customer Question

1998 Taurus cooling fan not working
JA: Are you fixing your Taurus yourself? What have you tried so far?
Customer: yes
JA: Anything else you want the mechanic to know before I connect you?
Customer: only 92,000 miles w/ new water pump, thermal switch for fan relays may be okay not sure
Submitted: 3 months ago.
Category: Ford
Expert:  K. Wiggins replied 3 months ago.

Hello, what's the VIN?

Customer: replied 3 months ago.
1FAFP52U3WG271692
Customer: replied 3 months ago.
MAY I TRY ANOTHER TACH
Expert:  Dan replied 3 months ago.

Is check engine light on? Do you plan to do the work yourself? Thanks.

Customer: replied 3 months ago.
ENGINE LIGHT ON CUZ I UNPLUG THE WIRE TO THERMAL FAN SW. THE FAN RAN SO I CAN MAKE IT HOME I CAN RESET WITH MY OBD II . I AM A MOTOR MECH, THUS I REPLACED 2-NEW HEADS ON THE MOTOR, RUN VERY SMOOTH NOW BUT MAY OVERHEAT IF I DONT FIX FAN TURN ON.......
Expert:  Dan replied 3 months ago.

Is check engine light on with everything plugged in?

Expert:  Dan replied 3 months ago.

Also, does it ever run hot while going down the highway?

Customer: replied 3 months ago.
OF COURSE CAUSE THE FAN NOT RUNNING, BUT TEMP GAGE NOT HIGHER THAN 1/3 SHOWING
Expert:  Dan replied 3 months ago.

It shouldn't run hot while going down the highway because road wind act's as the fan. If it overheats while going down the highway then you have other problems. Does it run hot while going down the highway? The temp gauge normally sits in the middle.

Customer: replied 3 months ago.
MY BELIEF IS IF YOU LET ANY CAR W/ EXTERNAL FANS NOT CLUCH, IDLE FOR A WHILE THE FAN SHOULD RUN....AS A REMINDER TUARES HAS A SMALL FRONT OPENING THUS NOT MUCH AIR FLOW AS MOST OTHER CARS...YES IT STILL GETS HOT EVEN AT 70 MPH ON HIGHWAY...W/ FAN NO GO
Expert:  Dan replied 3 months ago.

Does temp gauge go past the half way mark going 70 down highway?

Expert:  Dan replied 3 months ago.

Have you replaced thermostat?

Customer: replied 3 months ago.
REPLACED THERMOSTAT, GAUGE NOT NEAR 1/2, AT ALL BUT IF TEMP SENSOR NOT REGISTERING RIGHT, IT MAY NOT TRIGER PCM COMMAND !!!!! TO FAN......
Expert:  Dan replied 3 months ago.

The fan only comes on when needed, if gauge isn't going to the middle then fan probably just isn't needed. Is vehicle spitting up coolant? If it was overheating it would be.

Customer: replied 3 months ago.
UNLESS FAN IS RUNNING, HIGHWAY OR IDLING RADIATOR IS ALSO NEW LESS THAN 6- MONTHS, MILEAGE ONLY 92,000 MILES
Expert:  david craig replied 3 months ago.

Hi Im David, lets get away from all of this when you think it should be running. I dont care if you are going down the highway or not the fan will not come on until it gets a bit over mid gauge.

Expert:  david craig replied 3 months ago.

i dont care if it sits there and idles for 3 hours, its not going to come on til it needs to

Expert:  david craig replied 3 months ago.

So what exactly is your main concern? is it overheating is the temp gauge matching a digital temp reading at the thermostat housing or the temp sensor? is the computer seeing the same temp as the gauge?

Expert:  david craig replied 3 months ago.

are you there?

Customer: replied 3 months ago.
i don't know if computer reading right with temp sense but it overflows at reservoir and causing heat up at engine but dash gauge stays at 1/3 .....indication
Expert:  david craig replied 3 months ago.

ok, replace the coolant temp sensor for starters.

Expert:  david craig replied 3 months ago.

when the engine is at operating temp, are both radiator hoses equally hot?

Expert:  david craig replied 3 months ago.

also, once the engine is at operating temp and you shut it off, when you remove the cap, is the system under pressure?

Customer: replied 3 months ago.
I know about that check......I am a motor back yard mech thanks but not ford cooling system
Customer: replied 3 months ago.
by the way yes the cap is at pressure
Expert:  david craig replied 3 months ago.

so you have checked those 2 things?

Expert:  david craig replied 3 months ago.

how about the hoses?

Customer: replied 3 months ago.
hoses no fray or ware, the car has 92.000 miles only I installed 2-new heads, water pump, thermostat,thermal fan sw.....the motor runs like new after my repair, but the prob is fan does not run period in less I rig the supply to fan elect.........!!!!!!
Expert:  david craig replied 3 months ago.

ok. then lets work on that, but in noway should the coolant be boiling out of the reservoir, fan working or not.

Expert:  david craig replied 3 months ago.

schematic

Customer: replied 3 months ago.
okay......I am running out of options to think about this ....may it's electrical to relay commands.....i'm asking.......
Expert:  david craig replied 3 months ago.

do you have a volt meter?

Customer: replied 3 months ago.
by the way...when I j-rid fan it does not over boil at reservoir ever ....runs normal freeway or local
Customer: replied 3 months ago.
I am into electronics with a FLUKE METER..
Expert:  david craig replied 3 months ago.

understood. but theres still an issue with it overheating.

Expert:  david craig replied 3 months ago.

ok, let me look at the print for a minute and we'll start checking things

Customer: replied 3 months ago.
THANKS MUCH
Expert:  david craig replied 3 months ago.

did you check the highlighted fuse yet?

Customer: replied 3 months ago.
ALL HIGH LOW FAN FUSES CHECK GOOD
Expert:  david craig replied 3 months ago.

ok

Expert:  david craig replied 3 months ago.

pull the low speed fan relay.

Customer: replied 3 months ago.
OK JUST GIVE RUNDOWN CUZ I CANT RUN TO CAR BACK AND FORTH IF POSSIBLE I WILL WRITE DOWN
Expert:  david craig replied 3 months ago.

ok. hang on

Expert:  david craig replied 3 months ago.

thanks for your patience

Expert:  david craig replied 3 months ago.

pull the low speed relay out. make sure you have 12vdc at position 30 of the relay plug. doesnt matter if the key is on or off. then pull the high speed relay and check for 12vdc on position 87 of that relay plug. if those voltages are there, then put a jumper in the low speed relay plug from 30 to 87, key on and see if the fan runs on low speed.

Customer: replied 3 months ago.
OKAY MAKES SENSE BUT IF ALL FAILS REPLACE RELAYS OR NOT...GENERAL QUESTIONS
Expert:  david craig replied 3 months ago.

no. relays dont go bad as much as people think

Expert:  david craig replied 3 months ago.

once you get those checks done. we can do more.

Expert:  david craig replied 3 months ago.

hows it going?

Expert:  david craig replied 3 months ago.

any progress?

Expert:  david craig replied 3 months ago.

were you ever able to get anything figured out?