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Topic: engine fans running all of the time (Read 422 times) |
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David_South_West
Full Member
24V............ .Goodness
Posts: 188
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engine fans running all of the time
« on: Apr 26th, 2006, 8:39pm » |
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the engine cooling fans on my 24v have started to run full all of the time ...changed engine temp sensor(the one with 2 wires)..well i plugged the new one in to the socket on wiring loom..no difference.Switching air con off makes no difference.i have checked big green relay and when engine not running and ignition is on the relays open and fans switch off.
any ideas anyone.
Another problem speed sensitive steering is light in the mornings when everything is cold but soon as car warms up becomes heavy even at parking speeds
Thanks
David
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sector-9
Senior Member
No scorpio anymore
Posts: 1069
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Re: engine fans running all of the time
« Reply #1 on: Apr 26th, 2006, 9:37pm » |
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Unplug the air-con trinary switch - it's a three-pin connector in front of the 'radiator', near the LH headlamp. If that stops the fans then the fault is the switch or too much pressure in the air-con system (e.g overfilled).
Darren
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David_South_West
Full Member
24V............ .Goodness
Posts: 188
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Re: engine fans running all of the time
« Reply #2 on: Apr 26th, 2006, 10:02pm » |
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thanks for suggestion Darren...just tried that ..fans still on !
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sector-9
Senior Member
No scorpio anymore
Posts: 1069
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Re: engine fans running all of the time
« Reply #3 on: Apr 27th, 2006, 12:06am » |
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You're absolutely right meg, that's why I told him to disconnect the trinary switch as it is this which switches the fans on at full speed if pressure too high - it also shuts off the compressor, and if the pressure is too low (but doesn't run the fans).
Darren
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David_South_West
Full Member
24V............ .Goodness
Posts: 188
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Re: engine fans running all of the time
« Reply #4 on: Apr 27th, 2006, 12:29pm » |
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Just checked air con clutch definately engaging..checked voltage at ect sensor white wire is showing 4.6 volts....should it be the brown wire showing voltage?
Thanks
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Octavian_P
Senior Member
 
Posts: 1126
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Re: engine fans running all of the time
« Reply #5 on: Apr 27th, 2006, 3:42pm » |
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Hi there, can you measure the resitance, because that voltage doesn't sound good
at -40 degC 880 Kohm 4.53 V
http://www.fordscorpio.co.uk/sensors.htm
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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WAYNE
Newbie
I love YaBB 1G - SP1!
Posts: 43
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Re: engine fans running all of the time
« Reply #6 on: Apr 29th, 2006, 6:59pm » |
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hi
try checking wires from engine coolant temp switch for breakages by removing black sheathing carefully,then trace back towards waterpump.this hapened on my 24v and turned out to be a broken wire (green) which made fans run constantly.hth
wayne
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