Cooling fan causing problems

2001 SATURN STATION WAGON
185,000 MILES • 2.2L • 4 CYL • 2WD • AUTOMATIC
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JERRY57000
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When cooling fan comes on it stays on and engine loses power and transmission does not shift properly. Only solution is to turn engine off for a few minutes and restart it.
Apr 19, 2019 at 3:08 PM
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JACOBANDNICKOLAS
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Welcome to right turn signal or brake to light up

Since these things normally don't happen together, I have to try to find a common element which can cause it. The first thing that comes to mind would be a bad ground. When the fan is on, it is drawing and requiring more from the grounding system. With that, I first recommend checking the ground between the battery and engine block. Make sure nothing is loose or corroded. Also, there is a body ground from the battery (see pic 1). Check it also.

Next, check the ground responsible for the fan control module and fan (G100). See picture 2. Same thing there. Make sure everything is tight, clean, and not damaged.

Let me know what you find,.

Take care,
Joe
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Apr 19, 2019 at 8:13 PM
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JERRY57000
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Checked all grounds and all were good. I replaced the fan temperature switch and that seemed to solve the problem. The old temperature switch must have had a short or something wrong with it.
May 10, 2019 at 4:02 AM
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JACOBANDNICKOLAS
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Welcome back:

Great, I'm glad you found it.

Take care and let us know if we can help in the future.

Joe
May 10, 2019 at 9:08 PM