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03 Impala Air conditioning fans not working


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Baitbucket39
New User

Jun 10, 2020, 1:51 PM

Post #1 of 11 (331 views)
03 Impala Air conditioning fans not working Sign In

Air conditioning works but Fans don’t come on. Have checked all Relays. They
work. Problem seems to be where the middle Relay plugs into. It has 3 hots
and a ground. When I turn the Air conditioning on the ground goes hot on the
middle relay. Can’t imagine how a ground can be 12v live. Any idea of what to
do.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 10, 2020, 2:43 PM

Post #2 of 11 (324 views)
Re: 03 Impala Air conditioning fans not working Sign In

Yes, that is what happens when a relay is energized.

With the blower on, go to the blower plug and test for power and ground arriving at the motor and see which one is missing, if any.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
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Jun 11, 2020, 2:52 AM

Post #3 of 11 (279 views)
Re: 03 Impala Air conditioning fans not working Sign In

Do the fans turn by hand or rather carefully with a small stick or NOT a finger! Tom



Hammer Time
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Hammer Time profile image

Jun 11, 2020, 4:55 AM

Post #4 of 11 (265 views)
Re: 03 Impala Air conditioning fans not working Sign In

I thought he was talking about the blower fan, not the cooling fan. We need some clarification here.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
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Jun 11, 2020, 6:39 AM

Post #5 of 11 (252 views)
Re: 03 Impala Air conditioning fans not working Sign In

Yes,
I find if fans to condenser don't come on all goes wrong it stops the rest of the show - mostly may try and work then go wrong?
? for OP? Does this have two blower motors for dual side choices for "climate control?" T


Hammer Time
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Hammer Time profile image

Jun 11, 2020, 7:02 AM

Post #6 of 11 (249 views)
Re: 03 Impala Air conditioning fans not working Sign In

No car has 2 blowers, just 2 blend doors.

Most customers wouldn't even notice if the cooling fans aren't working and if they do it's usually because of overheating, not AC.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Baitbucket39
New User

Jun 11, 2020, 7:39 AM

Post #7 of 11 (239 views)
Re: 03 Impala Air conditioning fans not working Sign In

Thanks. The blower motor fan is fine the problem is the Cooling Motor fan. Yes it is 2 sided climate control. And the cooling fans work freely. I can force them to work Low,Medium and high. But When you put all the relays in the cooling fans will not kick on when the Air Is turned on.


(This post was edited by Baitbucket39 on Jun 11, 2020, 7:47 AM)


Hammer Time
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Jun 11, 2020, 7:46 AM

Post #8 of 11 (233 views)
Re: 03 Impala Air conditioning fans not working Sign In

OK, the reason you have 3 relays is that it is 2 speed.
The first step here is to test ALL fuses using a test light. I'm assuming your fan doesn't come on for temp either, true?

If all fuses check out and the fans aren't coming on for any reason, then you need to test for power and ground arriving at both fan motors.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Jun 11, 2020, 9:29 AM

Post #9 of 11 (222 views)
Re: 03 Impala Air conditioning fans not working Sign In

? So you do mean ENGINE's cooling fans I think? To add to checks see if you have a radiator cap on radiator if that's about spilling full or low. Sensors don't read well or erratic if in vapor suggesting now perhaps you are overheating but isn't warning you of an issue.


If low or overfull at recovery bottle it needs a pressure check at least on that list AND look for a leak anywhere you can know engine coolant travels, T


Baitbucket39
New User

Jun 11, 2020, 3:47 PM

Post #10 of 11 (192 views)
Re: 03 Impala Air conditioning fans not working Sign In

Update. Had drivers side headlight issue also. Tested wiring and it seemed to be back feeding ground to everything. Changed the 10 pin headlight connector and all my problems went away. Cooling fans work fine now.
Thanks to all the responses.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 11, 2020, 3:50 PM

Post #11 of 11 (188 views)
Re: 03 Impala Air conditioning fans not working Sign In

They both share a ground attached to the radiator support on the driver's side.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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