Front blower fan not working

NOFANBLOWER

MEMBER
2008 LINCOLN NAVIGATOR
174,000 MILES

The front fan has stopped blowing. So after research I decided to replace the blower motor (which was actually easy). Unfortunately, the new blower motor is not working either.
What else could it be?

Tuesday, July 10th, 2018 AT 10:57 AM

6 Replies

AL514

MECHANIC
4,781 POSTS

Hello there, sounds like the module that controls the blower might be bad. There are a few electrical checks you can do to find out if there is power at the blower motor itself. Here are a couple of wiring diagrams to guide you through it:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
https://www.2carpros.com/articles/how-to-check-wiring

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Tuesday, July 10th, 2018 AT 12:05 PM

NOFANBLOWER

MEMBER
4 POSTS

Hi expert,
Thank you for the quick follow back.

Are the diagrams in the fuse box area?

On my vehicle fuse boxes are under the hood right in front of the engine and I also saw small fuse box on the passenger side front area.

Also, I will have to get that little tester. Does not look like a cost that much.

Your thoughts please.
Mike

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Tuesday, July 10th, 2018 AT 1:13 PM

NOFANBLOWER

MEMBER
4 POSTS

Hi Expert,
I purchase power tester. Printed the wire schematics.
So I will Check:
*Fuse 24.
*Blower motor plug (just to make sure that my old blower motor and new blower motor were both duds. I am guessing that it will show that there is no power going to the plug).
* But where is wiring coming from panel front fan switch? Do I have to take the control panel part?
Thanks,
Mike

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Wednesday, July 11th, 2018 AT 12:35 PM

KEN L

MASTER CERTIFIED MECHANIC
48,289 POSTS

There is a blower motor relay that needs to be checked. Here is the guide and the location of the relay along with the wiring diagrams for the system so you can see hows it works:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken

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Saturday, July 14th, 2018 AT 12:52 PM

NOFANBLOWER

MEMBER
4 POSTS

Thanks for follow back. So the blower motor was not the solution. I did replace the blower resistor two years ago. So I did not think it was that. The guy at the parts store suggested to check it since it was a warranty part. Gave me a new one. Solution: Put the resister in five minute fix and the fan was up and running again. So the fan can go completely out and the resister can be the culprit it.