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Old 07-27-2011, 02:09 PM   #1
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Cooling fan not working.

My car overheated the other day driving through the mountain. When I stopped to let her cool off I noticed that my cooling fan was not running. Any help as where to start? Checked the fuses, They are all good.
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Old 07-27-2011, 02:49 PM   #2
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How about the fan relay?
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Old 07-27-2011, 02:50 PM   #3
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On drivers side of radiator is a fan switch, jump those two wires and fan should come on. If not check 2 pin connectors going to fans (near bottom of radiator), then apply 12 volts to fan motors directly, if still nothing the fan motor is bad. Mine usually go out in hottest months. Oops re-read and yours is 9000, i gave info for 900 disregard.
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Last edited by McQ; 07-27-2011 at 02:54 PM. Reason: can't read plain English
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Old 07-27-2011, 02:51 PM   #4
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what year 9k? The cooling fans/circuits changed a few times through the years
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Old 07-27-2011, 05:15 PM   #5
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Cheap fix is a switch inside car. Ive been running it that way for 2 years .I would predict most likely that the fan motor itself is fine.
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Old 07-28-2011, 02:44 PM   #6
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it is a 1994. Thanks for the help, id rather not run a switch inside the car. I have done that before twice. just dont feel like it would rather it fixed.
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Old 07-29-2011, 07:55 AM   #7
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I’m having a problem with the fan on my 93 Aero. I still haven’t totally fixed it, but I’m on track. I think I have a bad thermostat and will replace it this weekend.

There is a thermoswitch on the right (passenger) side of the radiator. If you follow the wiring down towards the bottom of the radiator, you’ll find where it plugs into the car’s harness. Disconnect the plug. If the connectors and wires are crusty and corroded, then clean/replace as needed.

Run a jumper wire between the solid blue and black wires… see if that turns the fan on.

If so, then your problem is that the car doesn’t “know” that the coolant in the radiator is hot… and therefore there’s likely a problem with the thermoswitch or the thermostat.
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Old 08-11-2011, 02:27 PM   #8
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fan

Well after pricing a fan relay and trying to diagnose whats wrong. Im confused on what wire your talkin about, solid blue and solid black, i see the blacks but not a solid blue one. ive made the decision to run a switch to the fan, any help on what wires should be where???
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Old 08-12-2011, 06:26 AM   #9
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Did you find the connector near the bottom of the radiator? The wires that run to the connector (on the car side) should be different colors.

If somebody's already hacked them up, though, then you're in trouble.


Edit to add link:
http://www.genuinesaab.com/psi/files/9kfan.pdf
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Old 08-12-2011, 10:07 AM   #10
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yea i found that im pretty sure, I hope so. There are two wires under my car that for some reason are just dangling, going to try and locate where they originate this weekend when i got more time. How about rigging a switch, just find a good ground and start testing im guessin.
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Old 08-04-2013, 11:17 PM   #11
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I have same problem in my 2001 Saab 9-5 2.3t, but what I noticed is the fans start working as I turn on the AC, but after I restart car they again stop working, so can some one send me instructions to get this tested and fixed, Dantinne can you please send PDF document for 2001 Saab 95 so I can diagnose the problem, it seems like a relay problem or temperature sensor, but I don't even know where they are located on my car, so please help with images and diagrams
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Old 08-05-2013, 11:16 AM   #12
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I ended up having an indy rewire a new fuse and relay.

Quote:
Originally Posted by Tommyjones View Post
it is a 1994. Thanks for the help, id rather not run a switch inside the car. I have done that before twice. just dont feel like it would rather it fixed.
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Old 08-05-2013, 01:14 PM   #13
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your question is in the wrong section...but....


Quote:
Originally Posted by Omar Barlas View Post
I have same problem in my 2001 Saab 9-5 2.3t, but what I noticed is the fans start working as I turn on the AC, but after I restart car they again stop working, so can some one send me instructions to get this tested and fixed, Dantinne can you please send PDF document for 2001 Saab 95 so I can diagnose the problem, it seems like a relay problem or temperature sensor, but I don't even know where they are located on my car, so please help with images and diagrams
9-5 has two different fans, not a single with low/high speed like the 9000 and 9-3. I'd start with swapping relays around first, but it's more likely the low speed fan is dead, the fuse is popped, or the relay is dead.

There's no resistor like the older cars.



**quote from the saabsite***

Saab Radiator Cooling Fan Issues:

The Saab 9-5 uses two electric radiator fans that both run simultaneously at the same speed, and can be off, low, or high speed, based on inputs from the engine temperature sensor and the air conditioning system pressure sensor. The fans can be off as the engine warms up, but if the a/c system is charged with freon and running, the fans should start almost immediately. While each fan has only two wires connecting it to the electrical system, the fan speed is dynamically controlled by the 12 volt power automatically being fed to these fans either in series (effectively 6 volts to each fan) for low speed, or in parallel (12 volts to each fan) for high speed. The downside to this design is that when they are fed power in series, if one fan stops working, the second fan will not run when the car calls for low-speed fans. Like Christmas tree lights that were wired in series, when one goes out, they both are out. Fan failures can be caused by an electrical dead spot in the motor, or by worn bearings, and the problem can be intermittent. The key indicator of a problem is if one fan runs and the other doesn't.

This problem is more difficult to detect because the dashboard temperature gauge is essentially programmed to have only three positions: cold, a wide "normal" range (locked in at 9 o'clock on the dash gauge), and hot. The gauge may show in normal range, especially in cooler weather, even with a defective fan. Symptoms of a defective cooling fan may include rough idle when stopped with the transmission in "drive" and the a/c compressor is on, which results in surges of high-side pressure, leading to an A/C leak, or a seized A/C compressor, and/or sudden serpentine belt breakage. It can also result in a burst radiator or coolant hose, and premature battery failure due to higher-than-normal under-hood temperatures. When driving, natural airflow through the radiator and condenser can mask these symptoms.
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