engine cooling fan won't come on (1995 mustang)

I have a 1995 mustang.

Car over heated the first time....water pump was leaking.. replaced it. Car overheated again about a weak later... the hose from the water pump had a large tear, replaced it. Both times car overheated coolant spewed out everywhere
(did replace coolant) .

Then car would over heat when idle or driving at low speeds only. Discovered the engine cooling fan is not coming on.

I replaced the engine cooling fan motor..still not working

I replaced the coolant temp. sensor...still not working.

found out the engine cooling fan on my car was recalled, took it to the dealership, they added a circuit breaker at connection..but said that wasn't the problem...they ran diagnostic test..test said the problem was the temperature sending unit..

I replaced the temp. sending unit and the fan STILL won't come on .


So I'm guessing it's the wires or connection, should I assume it's the wires to the temp sending unit since that's what the diganostic test said was the problem?

Any suggestions would be really appreciated.

thanks

thanks for responding to my message. I took it this afternoon to a repair shop, so far they have tested the fan, and confirmed that the fan will turn on, they say they have been running test ands haven't found the source of the problem yet...say to check back tomorrow.

update

they tested the fan, and said it works, it's capable of coming on....then they said it was the ccrm, said they would replace it for $386.00 , told them to go ahead...well today they replaced it and said that the fan still doesn't come on...it wasn't the problem, they put the old one back and are not going to charge.

He said he thinks it could be the ecm, but does not suggest we replace it yet (same thing could happen, we replace it and it turns out not to be the problem). Say need to do test on ecm and wiring, costs about 79.00 hr/ min. of 3 hrs. this worries me, because I will pay a min. of $240.00 then who knows how much it would cost to repair the problem. not sure if i should tell them to go ahead with testing???

says another option is to get ac fixed, if ac worked fan would turn on, ac has major leak, and possibly compressor needs to replaced, can run between $800-1100.

asked about installing manual switch, owner did not want to do because, say fan motor will burn out faster, and did not want to be responsible for future problems.

I live in texas, weather has been nice, but soon it will be very hot, avg. day 95-100+ temp, and we will need to cooling fan to come on more frequently than now.

when replaced the fan, connection looked ok, and I took it to ford for recall and they installed a part between fan and connection, but could be wires

should i maybe take it to somewhere where they specialize in electrical problems only? ....maybe they would be more familiar with this problem.

thank you everyone for responding any more suggestions are GREATLY appreciated.

another update

I had heard from a couple of people if u turn on the ac, the fan will turn on....my ac doesn't work...blows hot air....but I thought it wouldn't hurt to try.....I was driving on hwy so temp was fine, when I was almost to my destination, there was one traffic light ....car started to go slightly above the R in Normal on gauge, turned on ac..and fan did not come one.....tried again when I got into the parking lot and temp started to go up again...fan didn't kick in. this was right before I took my car to this last repair shop.


ok, so I went and picked up my car....they we're really nice..since they were not able to fix the problem, they were not going to charge me anything, not even for the tests..which I thought was awesome....said they kept thinking they figured out the problem..but everything they tried just didn't work.....they even tried putting freeon to see if they could get ac going and fan on.....said I had a major leak, all the freeon leaked out within hours and fan didn't come one....they recommened a shop that specializes in electrical problems.

after I got the car home.... I took a look under the hood...the wires that went to my cool. temp. sensor used to be all loose and worn looking...and I had suspected that that could be the problem...they had replaced them...fixed my loose battery connection...and a couple of other things....so they had replaced or repaired things as they were testing and trouble shooting.

I went on autozone.com, and looked up engine cooling fan...and the parts that go along with it , and I found a cooling fan motor relay: http://www.autozone.com/servlet/UiB...EGULAR+PARTS+LOOK+UP|~Cooling+Fan+Motor+Relay
only 4.99, thought it wouldn't hurt to try to replace and see what happens...wasn't sure where it goes...assumed in the black box under hood, that contains fuses, and 2 relays...replaced one first...turned on car..while sitting in car noticed reciept said, ac control relay...which made me think to try again turning on the ac....turned it on and fan turned on immedietly ......... we wanted to make sure it was the new relay that had done it.....so we put the old one back on...... and turned the ac on again..and the fan came on immedietly again..so, it wasn't the new relay . I'm thrilled that I was able to get the fan on at all, but i'm not sure what changed, it must've been something they did at the repair shop.

right after I saw the fan come on with the ac, with new relay in, I turned off the ac, and let the car warm up...and temp still goes too hot, fan won't kick in by itself.


talked to someone else who works at a shop and has worked on alot of mustangs... when he heard my problem he said it was a relay that goes bad and needs to be replaced......

forgive my ignorance, but what is a relay....and where are they...is what he is talking about different than what I replaced today?

again any advice is GREATLY appreciated.

wrong location

ok so I was definetly putting the fan control relay in the wrong place....I found a diagram online...the 2 I found in the black box with the fuses..one is for the starter, the other is for the horn......I was way off... where is the fan control relay located?

I disconnected the wires to the coolant temp sensor and inserted the wire (paper clip), with key on or car on the fan turned on immedietly.

Later I took out the metal wire , but still kept wires to coolant temp sensor unplugged, and fan still will turn on immedietly key on or car on.

View attachment 391220
View attachment 391222
View attachment 391225