Originally Posted by Newbie tnt
Good day ,my 2000 dohc ford focus has only one fan which is dual speed,the car does have air conditioning however my fan will not turn on unless ac is turned on or the defroster is engaged.
I have tested my fan resistor with a new one I purchased both resistors(old and new) read same values with multimeter. I have also tested fuse f6,r15,r16 and all have passed with continuity.To further support this I jumpered both relays r15 and r16 on pins 3 and 5 and the fan came on with low and high speed respectively.
This testing should eliminate my fan resistor,wiring,fuses and relays.
I have also recently changed my cylinder head temperature sensor thinking this was the issue.
Can anyone tell me what I'm missing,what else would control the PCM to turn on the fans?
Neither low or high speeds come on while looking at the temperature 120c and counting.
I love my focus,besides a failed fuel pump over almost 12yrs she has been one of the most reliable cars I have ever owned,I need help ford gurus
I really don't want to give up on this car.Any advise would be appreciated
My 2002 that I gave my son was doing the same thing. Never did figure it out. I ended up wiring a switch and relay for heavy traffic. The fan cuts off over 30mph anyways. This problem has popped up several times over the years on this forum. No one has come up with a satisfactory solution. Wish I could help.