Having problems with your 1999 Mercury Cougar ?

When the fan is not working that means one of three things. first check to see if you have voltage going to the fan. second check to see that the fuses and fan relay are good. third if the connections are good and you have voltage it could be the temp sensors for the fan are bad. one last thing with the engine off check that the fans free spin and are not locked up.

Posted / edited by AnonymousUser on : 19-03-2018

Answers :

Hi, the fuse and relays are in the box in the engine compartment. The wiring diagram is also shown below. The PCM turns the fans off and on based on data it receives from the coolant temp sensor and the A/C settings. The sensor is on the back of the engine as shown in the pics below. On the 4 cylinder engine, you have to remove the air cleaner to access the sensor. On the V-6, it may be easier to access from under the car. Please let me know if you have more questions.


2.0 liter, temp sensor:

2.5 liter engine temp sensor:
Repair Help & Product Troubleshooting for 1999 Mercury Cougar

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