Question about 1999 Ford Taurus
I also have a 1999 Ford Taurus with the 3.0L V6 Vulcan OHV engine. My problem isn't in the water pump (I know this because it's only about three months old). The thermostat is also new, as is the coolant temperature sensor (temperature switch or Engine Coolant Temperature Sensor) and the pigtail/wiring harness that connects (I found a burnt spot in the wire that goes to the pigtail and made sure to connect the new harness to an area that has good continuity), the radiator cap is less than three weeks old, and the heater core has been bypassed. The cooling fans operate, but seem to only happen when the car is placed in park. I have driven about quite a bit, and never heard the fans come on while at a stop light or stopped in traffic, but pull into a parking space and place the car in park, within just a couple of seconds the fans start to run. I have recently noticed a small pool of coolant on the lower left corner facing the engine of the coolant recovery tank. There is a trail of coolant that comes around the edges of the raised portion as well. If this is leaking, could this be causing a problem with the fan? If I disconnect the CTS so that the fans run continuously, I have no problems with the cooling system, but if I plug it back in, the fans only operate while in park. I can turn the engine off after driving (the fans kicking on shortly after placed in park, and kicking off as soon as the engine is killed), then the coolant rises rapidly in the recovery tank, steams, and overflows like a glass left too long under a running faucet from the recovery tank filler neck, beneath the radiator cap.
Does your ac work? When you turn on your ac, all the fan should be working at all times. See if they remain on when you are driving. If they go off. check the CCM module located in front of the vehicle, it is a metallic box usually black in color not to far from the radiator. I can't remember if it was the right side or left side of the radiator. The inside of that box has electronic circuit which also drive the compressor directly. You really can't test this box, the only thing you can do is visually check it for burnt components inside. I had to repair this box on my 96 taurus because a transistor inside was open that drive the compressor clutch solenoid. I belive this box also controls the fan. Unplug the connection to this box, to see if it affects the fan by turning it off or on. Make sure the key is on tho. when you check it.
Posted on Jun 28, 2009
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Posted on Jan 02, 2017
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