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Fan does not come on, high works with battery, low doesnt.

 
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Old 15 May 2017, 03:45 pm
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Default Fan does not come on, high works with battery, low doesnt.

I have a 2001, it has been overheating.

The fan does not come on at all. I tested it manually with the battery, the high speed works the low does not.

The fan connector is good, the I tested the fuse and relay in another slot and they are good.

Will the high speed side not come on if the low speed is dead? The temp. gauge read at around the 3/4 mark before I shut it off and the fan didn't come on.

I realize the fan needs to be replaced, but before I do that I want to know if there is a problem somewhere else that would prevent the fan from coming on.

*EDIT*
-I have turned the a/c on and the fan does not come on, though the a/c needs to be recharged so I don't know that it would

Last edited by Allos; 15 May 2017 at 03:59 pm.
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Old 15 May 2017, 03:48 pm
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Default Re: Fan does not come on, high works with battery, low doesnt.

Welcome to the forum from Texas. Please go to the new members section and tell us some about you and your Cruiser. Add a pic or two.

If you manually tested the fan and the low does not come on, sounds like it's time to replace it. The high should come on with the A/C.
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Old 15 May 2017, 04:01 pm
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Default Re: Fan does not come on, high works with battery, low doesnt.

Yes the brushes in the fan motor wear out and its usually the low speed cooling that does not come on.
Complete fan assembly is less than $100 and pretty easy to install in about an hour.
Lets hope you havent overheated it to caus other problems.
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Old 15 May 2017, 04:06 pm
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Default Re: Fan does not come on, high works with battery, low doesnt.

I understand the fan needs to be replaced, but before I do that I would like to know why the High speed is not coming on. I don't want to replace the fan to find out there is something still wrong.

I am assuming that the high speed fan should still come on if the car is hot enough even though the low speed is dead.
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Old 15 May 2017, 04:09 pm
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Default Re: Fan does not come on, high works with battery, low doesnt.

As far as I know, the high side works with the A/C only. Meaning, start the car, turn on the A/C and the high speed fan should run. It won't run just because the temp is hot. You can pick up a Dorman brand fan at most local auto parts store.
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Old 15 May 2017, 04:32 pm
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Unhappy Re: Fan does not come on, high works with battery, low doesnt.

New Fan I would guess.
IM actually replacing my fan as we speak.
I did the alligator wire test to the 3 pins, and they both turn the fan on.
Maybe it has something to do with a burn High Fan relay fuse?
Bad wire connection. I've read that those are usually the ones that burn out first because they are used more than the low speed. Riggght???? Maybe wrong lol
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Old 15 May 2017, 06:35 pm
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Default Re: Fan does not come on, high works with battery, low doesnt.

So I wired the high speed side of the fan to the low speed side of the harness, and that is working. My question still, is though why the high speed side didn't come on, on its own.

I found a chart posted here:

It shows that the high speed fan should come on at 103 degrees C.
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Old 15 May 2017, 08:08 pm
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Default Re: Fan does not come on, high works with battery, low doesnt.

Two things to question.

Do you know what the temp was? You would need a different gauge.

Was the car moving? It states that it will go off under 36mph.

It's good to ask questions before spending money. IMO, you need a new fan assembly. Part of the reason is because I had the same issue with my '01 LE. New fan, three years, no problem.
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Old 15 May 2017, 10:55 pm
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Default Re: Fan does not come on, high works with battery, low doesnt.

No this was at idle, so if it should have come on at 103c / 219 f, with the a/c off.

I don't know what the actual temperature was but I am assuming the middle of the gauge is around 195f which is what the thermostat is, and the gauge read well past the middle closer to 3/4's, but not yet in the red.
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Old 15 May 2017, 11:34 pm
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Default Re: Fan does not come on, high works with battery, low doesnt.

Quote:
Originally Posted by Allos View Post
So I wired the high speed side of the fan to the low speed side of the harness, and that is working. My question still, is though why the high speed side didn't come on, on its own.

I found a chart posted here:

It shows that the high speed fan should come on at 103 degrees C.
I've never fully understood this chart, because from what I see, the bottom 2 boxes, as soon as you start a cold vehicle, and you're not moving, the fan shouldn't come on until the vehicle reaches 180 degrees F.

But when you start a cold vehicle and turn on the a/c, the fan immediately comes on, and that's normal operation. But why would it immediately come on when the vehicle certainly has not yet reached 180 degrees F?
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