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Radiator fans don't come on

 
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Old 06-06-2008, 01:14 PM
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Radiator fans don't come on

Well just recently the A/C in my 95 Lude took a **** on me so I decided to break out the old Helms manual. Upon even diagnosing the A/C system I saw that my radiator fan doesn't kick on at all even when the car is at normal operating temperature. To make sure that fans aren't seized I jumped the coolant sensor on the rear thermostat housing and both of the fans kicked on.

I checked all the fuses - No 9, 11 under the dash, and 45, 47 underneath the hood. All were fine - I was even so anal has to test the continuity on the fuses as well and they all passed.

I then checked for continuity between the AC pressure switch and the diode - passes. I couldn't check the continuity on the diode because I didn't have a voltmeter that tests diodes but I am pretty confident that it is OK. I tested for continuity between the condenser fan relay and the diode - passes. Moved onto the radiator control module and tested for a good ground and voltage - passes. Only thing I can think if is a bum radiator control module - anybody have any input as well?
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Old 06-06-2008, 01:30 PM
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SOUNDS like a bad control module, but i'm not positive.

unfortunately the online helms manual doesn't cover diagnosing a bad RFCM
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Old 06-06-2008, 02:14 PM
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no none of them kick on at all or just the A/c fan..
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Old 06-06-2008, 02:43 PM
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mine VERY rarely turns on. If its extremely hot and i'm in traffic it will but otherwise it doesn't tun on. With this said, I wouldn't worry about it too much unless its overheating?
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Old 06-06-2008, 07:49 PM
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None of them kick on - even when A/C turned on the condenser fan doesn't even kick on. I am throwing no engine codes and the temperature gauge stays right in the middle. I am thinking its either a bad temperature sensor in the thermostat housing or the fan timer module has crapped out. I am going to purchase a replacement fan timer module so I will let you know if it fixes it. Other than that looks like a summer without AC - yee haw!
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Old 06-06-2008, 11:33 PM
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just buy a general fan temperatur sensor from the parts store you can set it at the temperature you want to kick on... its like 20 bucks


looks something like this
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Old 06-07-2008, 11:10 AM
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If the compressor doesn't turn on the fan won't turn on either. Like I said, I wouldn't worry about it unless you have signs of overheating.
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Old 06-07-2008, 12:15 PM
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ummmm mine were broken too when i got the car, and overheating was gay... but it fixed itself hahaha.

but seriously all i can think of is the module or temp sensor :?
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Old 06-15-2008, 02:19 PM
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No luck on the radiator fan module - looks like the next course is to purchase the thermostat sensors.
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