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Blower motor not working

Tiny
S-SCHOP1
  • MEMBER
  • 2003 CHEVROLET IMPALA
Electrical problem 6 cyl Two Wheel Drive Automatic

this vehicles climate control will not come on, the blower motor is not working, the a/c button doesn't light up when pressed.I found that in the fuse block on the drivers side of the dash that the blower motor fuse has no power. If I supply that fuse with power then everything works normally. All other fuses are good. My main question is, where does this fuse receive power from. Thank you for your help in advance.
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Wednesday, August 4th, 2010 AT 12:04 PM

26 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Hello and thanks for donating

According to the schematics, the A/C Blower Fuse (25 amp) will have an orange wire going to the blower motor relay. Have you tested the relay out? From the relay it will go to multiple places, including the blower motor itself and the HVAC Control Module.
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Wednesday, August 4th, 2010 AT 10:53 PM
Tiny
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The fuse I have no power at is in the drivers side fuse block (20 amp). Where is the blower motor relay? Im going by the fuse panel covers and none of them say blower motor relay. Thanks.
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Thursday, August 5th, 2010 AT 1:12 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
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The blower motor relay is integral with the blower motor resistor, sorry I just noticed that. I see the other A/C fuse you speak of, has a brown wire going to it. It goes to the same places as the other I listed, but if the fuse itself doesn't have power then it must be the wiring going to it at fault because it gets power from the battery to the fuse, then from fuse to the other components.
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Thursday, August 5th, 2010 AT 2:31 PM
Tiny
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Ok, thanks. Is there any way I could get a wiring diagram of this circuit?
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Thursday, August 5th, 2010 AT 2:38 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Sure it's rather large though and probably not readable on this forum, so I have sent it to your email on file as well. (UPDATED WIRING DIAGRAMS LOCATED AT THE BOTTOM OF THIS POST)
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Thursday, August 5th, 2010 AT 2:55 PM
Tiny
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Awesome thanks! Also have you heard of any of these concerns caused by the BCM? This same car has the security light, the trunk ajar light, the airbag light, and the low tire light on also.I know. WOW.
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Thursday, August 5th, 2010 AT 3:20 PM
Tiny
BLUELIGHTNIN6
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Yep that's usually a sign of a crazy computer (aka BCM, PCM etc.). None of those things are related at all other than that the computer has last say in all of their functions.
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Thursday, August 5th, 2010 AT 3:39 PM
Tiny
S-SCHOP1
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Could the bad bcm be the cause of my a/c problem?
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Thursday, August 5th, 2010 AT 11:02 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
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Don't think it could cause the fuse not to have power because again the power comes straight from battery to the fuse box.
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Thursday, August 5th, 2010 AT 11:04 PM
Tiny
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Ok, i'll start digging. Thanks again.
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Thursday, August 5th, 2010 AT 11:12 PM
Tiny
BLUELIGHTNIN6
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No problem, let me know how it goes and if you need further assistance just post here.
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Saturday, August 7th, 2010 AT 11:21 AM
Tiny
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Just wanted to give you an update. The reason the fuse for the a/c control head wasnt getting power was the ignition switch. The orange wire coming from the ignition should have power with the key in the on position, mine didnt. I replaced the ignition switch and problem solved. Also as far as the car dying and the multiple insturment cluster warning lights, the battery was shot tested it three times and it failed every time. Replaced the battery and havent had a problem since. Yay
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Tuesday, August 24th, 2010 AT 3:39 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Glad you could get it fixed please use 2CarPros. Com anytime we are here to help.

UPDATED WIRING DIAGRAMS BELOW

Best, Ken
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Monday, April 10th, 2017 AT 12:49 PM
Tiny
JWMCALLIS
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 168,000 MILES
Heater problem
2003 Chevy Impala 6 cyl Front Wheel Drive Automatic 168000 miles

Hi,

The heat/AC blower on my 2003 Impala has only worked on the highest setting (5) for over a year now. Just last week, it stopped working completely. I can hear a clicking noise when I switch back and forth from 4 to 5. Winter is getting closer and I really will need as much heat blowing out as possible! Thanks for any insight you can provide.
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Monday, April 10th, 2017 AT 2:54 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
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Power the blower motor from the battery if it comes on do below

Inspect and test the blower motor relay and the blower motor resistor
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Monday, April 10th, 2017 AT 2:54 PM (Merged)
Tiny
PHIIP982
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 78,000 MILES
Electrical problem
2003 Chevy Impala 6 cyl Front Wheel Drive Automatic 78000 miles

THE FAN HAS 5 SPEEDS, 1 & 2 SPEEDS DON'T WORK, 3, 4 &5 WORK. HOW DO I REPLACE THE SWITCH?
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Monday, April 10th, 2017 AT 2:54 PM (Merged)
Tiny
RHALL77
  • MECHANIC
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Its not the switch its a blower resistor. It is located on the passenger side lower part of the hvac box
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Monday, April 10th, 2017 AT 2:54 PM (Merged)
Tiny
CRPGNUT
  • MEMBER
  • 2 POSTS
  • 2003 CHEVROLET IMPALA
Air Conditioning problem
2003 Chevy Impala 6 cyl Front Wheel Drive Automatic

I was driving in to work and had the A/C on. The blower was running fine and just stopped completely. It doesn't work on any setting from 1-5. I swapped the fuses on either side of the car and that didn't seem to do anything. Changing to defrost or heat doesn't seem to make a difference. I can hear the A/C kick on when pressing the button, but no blow.

Thanks for your help
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Monday, April 10th, 2017 AT 2:54 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
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What model impala do you have?Also do you have manual or auto climate control?Let me know so I can get you the correct information.
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Monday, April 10th, 2017 AT 2:54 PM (Merged)
Tiny
CRPGNUT
  • MEMBER
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3.8 V6 and I guess manual climate control. I have to press a button to turn it on or off. There's no letters after my Impala name. It's not a LS or anything.
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Monday, April 10th, 2017 AT 2:54 PM (Merged)

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