It is currently Fri Mar 29, 2024 4:01 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: HVAC blower doesn't work
PostPosted: Mon Aug 31, 2009 1:42 am 
Offline
SLE Member
SLE Member

Joined: Tue Aug 05, 2008 5:06 pm
Posts: 33
Year and Trim: 01 Bonny SE
01 SE with manual controls. the hvac blower will not work. i bought another motor from the yard and plugged in. no luck.
i double checked the 3 connectors i could see connected to the motor area and they looked good. the lights on the dash controls light up. not sure where to check next or what to troubleshoot.
anybody offer some insight??


Top
 Profile  
 
PostPosted: Mon Aug 31, 2009 8:32 am 
Offline
Posts like an L67
Posts like an L67

Joined: Wed Jun 04, 2008 7:55 pm
Posts: 1204
Year and Trim: 2003 Lesabre Limited, 2008 Cobalt, 2014 Malibu
mlkmgr wrote:
01 SE with manual controls. the hvac blower will not work. i bought another motor from the yard and plugged in. no luck.
i double checked the 3 connectors i could see connected to the motor area and they looked good. the lights on the dash controls light up. not sure where to check next or what to troubleshoot.
anybody offer some insight??


From my 2003 leSabre Helms service manual:

Fuse block rear seat #2 30A
Power to blower

Fuse block rear #37 10 A
to the control unit on

Have you check for power at the three prong connector to the blower?
A is a feedback wire
B should have 12 V when blower is on
C should be ground

I'd check these connecting to a good ground with your meter.
I suspect you'll find your problem in these checks.

The blower motor i run through a blower Motor Control Processor box. The ground wire goes to that box and the box shows a ground.


Top
 Profile  
 
PostPosted: Mon Aug 31, 2009 8:57 am 
Offline
Resident Gearhead
Resident Gearhead

Joined: Mon May 19, 2008 10:19 pm
Posts: 5530
Location: Hillsboro, Oregon
Year and Trim: .
2015 Buick Enclave
2013 Buick Regal GS
I am looking at a 2000 FSM and on the 3 prong connector to the blower motor:

pin A black wire speed control
pin B purple wire battery voltage
pin c brown wire blower motor flange ground


There is a blower control module mounted on the side of the AC housing that gets inputs from the HVAC controls for the blower. When the blower commanded on, check the voltage between pins A and B. It should vary between 4 to 6 volts when the fan speed commanded is changed.


Top
 Profile  
 
PostPosted: Mon Aug 31, 2009 9:08 am 
Offline
SLE Member
SLE Member

Joined: Tue Aug 05, 2008 5:06 pm
Posts: 33
Year and Trim: 01 Bonny SE
thanks for the replies. the car is in on a road trip at the moment. will check the voltages when the car returns.

i forgot all about the fuse block under the rear seat. perhaps it is something as simple as the fuse....i hope!!


Top
 Profile  
 
PostPosted: Mon Aug 31, 2009 9:10 am 
Offline
Resident Gearhead
Resident Gearhead

Joined: Mon May 19, 2008 10:19 pm
Posts: 5530
Location: Hillsboro, Oregon
Year and Trim: .
2015 Buick Enclave
2013 Buick Regal GS
Yes, I was assuming that was verified, but if the original motor went bad it probably took out the fuse.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 5 hours [ DST ]


Related topics
 Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. 2005 Bonneville SE blower moter/fan doesn't come on

homeboy517

9

1181

Fri Aug 12, 2016 12:23 pm

Luxrain View the latest post

There are no new unread posts for this topic. Tach sometimes doesn't work, strange codes

Oldman

4

2997

Wed Nov 30, 2011 10:50 pm

harofreak00 View the latest post

There are no new unread posts for this topic. Check Engine Light doesn't work

Q-Ship

1

1247

Sun Jan 20, 2013 3:01 pm

nickell View the latest post

There are no new unread posts for this topic. HVAC Blower motor has a mind of its own

sporsref

4

1728

Tue Sep 10, 2013 10:05 pm

nos4blood70 View the latest post

There are no new unread posts for this topic. 2005 SE A/C HVAC Blower Motor

1oldman

3

2068

Sat Aug 24, 2013 11:47 pm

1oldman View the latest post

 


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group


phpBB SEO