The cooling fan just keeps running even when the engine is shut off and will keep going until the battery is flat.
I suspect a stuck thermal switch somewhere from my experience with previous cars. I've just got the Galaxy so I'm not familiar with its systems.
The model is 1.9 TDI year 2001.
Edited by Pugugly {P} on 17/11/2007 at 15:56
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Neil
This is a hideously complex control system that's linked into the air-con and the engine temp.
Does the fan come on at key-on or when the engine gets hot? What type of air-con has it got - manual or climate? How many cooling fans are fitted?
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Yeah, I know, I'm currently going through the wiring diagram in the Ford TIS I downloaded.
The fan is on without the key and is now running with the engine cold. It seems to be running permenantly today as the engine would not reach operating temp. It seems to have done this a couple of times only and so seems intermittent. My first suspect was a sticking relay somewhere.
The AC is climate control. I've tried removing F18 which from the diagrams is the fuse in the temp switch / ac bypass path and has no effect. I'm suspecting the fan control module at the moment but don't yet know where it is.
Neil
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I forgot, only one fan is operating.
This is labelled cooling fan motor 2 or M118 in the diagrams. It is the fan nearest the battery.
Edited by Pugugly {P} on 17/11/2007 at 17:13
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Neil
There is an air-con engine coolant temp switch and a fan control relay feeding the fan control module.
Heaven knows where anything is on a Galaxy - they're never where they're supposed to be - and there are no less than three different versions of fuseboxes in 2001 alone.
If you've got a box of 5 Maxi and 3 standard fuses in the engine bay; try pulling the middle Maxi.
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The cooling fan and a/c compressor relay module is usually located in the battery bay area near the front panel of the car.I think you will need to check the live data from engine Ecu to check if it is seeing a high engine temp due to a faulty coolant temp sensor.Also if only 1 fan is running ,then check the strip fuses in the plastic fuse box that is attached to the top of the battery.hth
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Right, got the fan control unit out. Under the engine bay fuse box.
Tested the unit with a multimeter and there is a short to the second fan.
Opened the unit up and guess what!
Three relays, nothing else and one of them with burnt contacts fused together !!
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Check for wiring for shorts and that the fan is free to turn before sorting out the relay.
If the relay has been overloaded to the extent of contact welding (they sometimes interlock - which is a different problem) the phosphor bronze contact leaf spring may have lost its tension due to overheating. On some VAG fan units there is a half-speed resistor inside the motor (dumbo design) which overheats and can short to ground. Is this relay box an offering from Ford or from VAG?
Both makers have fitted rubbish electrical components due to overbearing accountants.
659.
Edited by 659FBE on 17/11/2007 at 18:23
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