2000 Taurus Cooling fan not working

[shorod]

Just about any modern car now days will have cooling fans controlled by the PCM (although other manufacturers may call it something other the PCM, like ECM or ECU, etc.). With computer control and the strict emissions standards today, it only makes sense to have the fans controlled by the computer. The computer needs to know what the coolant temperature is to properly adjust the air/fuel ratio. The computer needs to know when there is a demand for the A/C compressor to adjust the idle speed. The PCM is also often tied into the alternator to help it determine the proper current to provide the electrical system. With the computer having knowledge of all these loads and fan requests, it seems very reasonable to have it control the cooling fan(s) as well.

-Rod

[hawkinjax]

Hi, I was wondering if you had a link for that schematic? Also, where did you buy your replacement fans at?

[noa brando]

on an o1 taurus there is a small black box to the right of your battery toward the bottom. unhook the box remove the cover and replace the relay inside. i had the same exact problem and i figured it out on my own. i replaced that relay started up my car and hey,hey,hey the cooling fan came on turned on the ac and that fan came on as well. finally figured it out.