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Old 05-06-2010, 03:43 PM   #1
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Default cooling fans wont shut off

in my 95 se the cooling fans come on as soon as the switch is in run position, dosent matter if car is running or not, all the gauges in the car work well temp, oil,alt.ect. ive seen plenty of posts of fans not coming on but mine never quit unless i unplug them. any one have any ideas? thanks
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Old 05-06-2010, 03:55 PM   #2
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Both fans or just one? Both would probably mean the high speed fan relay is being commanded on or the command wire is shorted to ground.
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Old 05-06-2010, 04:25 PM   #3
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it is both fans all the time
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Old 05-06-2010, 04:44 PM   #4
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where would i look for this command wire? or how can i fix it? would replacing fans help?
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Old 05-06-2010, 06:00 PM   #5
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It'* 5pm right now. I have a little league game to goto in alittle bit. I'll look up your issue in my 95FSM when I get back...
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Old 05-06-2010, 10:17 PM   #6
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Verify your temp gauge is NOT reading 226 degrees.

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The high speed relay is energized by the PCM if the A/C refrigerant pressure fan switch opens, indicating refrigerant pressure above 210psi, or engine temperature reaches 226.
Disconnect the electrical connector that is on the A/C line down at the A/C compressor. Jump both pins with a jumper. Turn power on, do fans come on?
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Old 05-07-2010, 10:23 AM   #7
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Best way to do that is through a scan gauge. The coolant sensor is a dual sensor built together. One part feeds the dash gauge and the other feeds the pcm. Therefore the pcm might not see the same reading as the dash gauge if part of the sensor went bad.
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Old 05-07-2010, 10:26 AM   #8
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dont have a scan gauge, could i swap the sensor from my other car? the fans work on that one, excaltly which sensor is it? thanks
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Old 05-07-2010, 10:30 AM   #9
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On the S2 motor it'* the sensor directly under the thermostat housing on the LIM. Follow the one set of wiring that heads down on that side and you'll spot it.

What'* your other car? It'* a ~$20 sensor.
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Old 05-07-2010, 10:33 AM   #10
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ive got several 93 and 94 ssei 94,95,96 se im the one who had, still got the pre-ignition problem with the 94 ssei
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