Radiator Fan not working - Forums at Modded Mustangs
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post #1 of 6 Old May 23rd, 2016, 11:11 PM Thread Starter
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Radiator Fan not working

While driving earlier today, I noticed a smell which reminded me of burning coolant, and pulled over. I popped the hood and see that the radiator fan was not running.

I read that the fan would kick in when the A/C is on. So I checked it just now and with the A/C on (compressor clutch kicking in), the fan was not running.

I ran wires from the battery directly to the fan, with the same result - radiator fan not working. Does this confirm that the radiator fan assembly needs replacing? Anything else I should check?

1999 GT Dark Green Satin
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post #2 of 6 Old May 24th, 2016, 12:38 PM
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Did you try both speeds on the fan when you jumpered it? But it sounds like you're on the right track. If it's not running with power to it, sounds like its time for a new one.
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post #3 of 6 Old May 24th, 2016, 02:33 PM Thread Starter
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Originally Posted by WickedSnake00 View Post
Did you try both speeds on the fan when you jumpered it? But it sounds like you're on the right track. If it's not running with power to it, sounds like its time for a new one.
Thanks for the reply.

Yes, I tried both speeds. Assuming I tapped into the correct prongs on the fan. There are three. I believe the first prong is low, second is high and third is the ground.

I went ahead and ordered a replacement Dorman from RockAuto. Cheaper and would arrive faster than what Autozone and O'Reilly's have to offer.

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post #4 of 6 Old May 24th, 2016, 02:59 PM
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Thanks for the reply.

Yes, I tried both speeds. Assuming I tapped into the correct prongs on the fan. There are three. I believe the first prong is low, second is high and third is the ground.

I went ahead and ordered a replacement Dorman from RockAuto. Cheaper and would arrive faster than what Autozone and O'Reilly's have to offer.
There are three, but are you sure you checked the right ones? RD/OG is high speed, OG/LB is low speed, and black is ground. It's been awhile but I think the black ground was in the center.


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post #5 of 6 Old May 24th, 2016, 04:08 PM Thread Starter
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Quote:
Originally Posted by WickedSnake00 View Post
There are three, but are you sure you checked the right ones? RD/OG is high speed, OG/LB is low speed, and black is ground. It's been awhile but I think the black ground was in the center.
I think so. I searched "99 Mustang GT Fan connector" yesterday on Google Images and found these three pics:







After confirming that the fan does not come on using the third prong as ground, I reversed the polarities just for the heck of it and nothing changed.

I plan to get a multimeter/multi-tester eventually. I haven't used one in over a decade. Any recommendations.

Thanks again for your replies and help.

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post #6 of 6 Old May 26th, 2016, 01:47 AM Thread Starter
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Fan replaced and working as it should.

Sucks that the original fan only lasted 89K miles. Made in USA.

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