Everything Electrical & Electronic Have an electrical problem? Lighting, Alternators, gauges, DIC, HUD, etc? Post it here. Please post Audio problems in the Audio forum, and Engine control problems in the appropriate Mechanical forum for your year.

Climat control prob.

Thread Tools
 
Search this Thread
 
Old 01-12-2006, 09:34 AM
  #1  
Senior Member
Posts like a Northstar
Thread Starter
 
Jason1351's Avatar
 
Join Date: Jul 2005
Location: Detroit, MI
Posts: 649
Likes: 0
Received 0 Likes on 0 Posts
Jason1351 is on a distinguished road
Default Climat control prob.

Name:  eec.jpg
Views: 38
Size:  60.4 KB
I have the climate control pictured above and i am having a problem with an intermitet (sp?) blower. The blower comes on half speed, then turns off and then go'* full blast all while the monitor says full blast. When it wasn't working, i used my light tester and checked the wiring going the blower and nothing. I would like to know if there is a relay or something between the control and the blower or is it just the control itself?
Old 01-12-2006, 11:55 AM
  #2  
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Likes: 0
Received 8 Likes on 8 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Yes there is a relay in the maxifuse center. However your problem may be blower motor or blower control module.

The module is located on the blower housing plastic.
Old 01-12-2006, 05:31 PM
  #3  
Senior Member
True Car Nut
 
markwb's Avatar
 
Join Date: Oct 2002
Location: Groton, CT _NEBF 05, 06, 07_
Posts: 2,703
Likes: 0
Received 0 Likes on 0 Posts
markwb is on a distinguished road
Default

Blower Motors used in Climate Control Systems are variable speed, their voltage is ramped up or down accordingly utilizing a DC logic motor control. Blower Motors used in manual control are multi-speed motors utilizing voltage dividers for the appropriate speeds. I'm suspecting a blower control module. Need GH with 96-99 FSM to assist.
Old 01-12-2006, 06:21 PM
  #4  
Senior Member
Posts like a Northstar
Thread Starter
 
Jason1351's Avatar
 
Join Date: Jul 2005
Location: Detroit, MI
Posts: 649
Likes: 0
Received 0 Likes on 0 Posts
Jason1351 is on a distinguished road
Default

As i posted, there'* no power going to the blower. Therefore, it isn't the blower motor or anything on the blower housing. But i will check the the relay before i replace the control itself. Thanx Bill.
Old 01-12-2006, 06:22 PM
  #5  
Senior Member
True Car Nut
 
randman1's Avatar
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Likes: 0
Received 2 Likes on 2 Posts
randman1 is on a distinguished road
Default

There are no relays that operate the blower motor if the car is equipped with Electronic Climate Control. The Blower Control Module does it all. When the ECC display indicates the highest fan setting, you should read full battery voltage on the purple wire. The tough part of testing the BCM is that you have an intermittent problem so you'll have to try to duplicate the varying speeds at time of testing. The testing you've already done with the light suggests that the BCM is the problem but I'd like to see it tested with a volt meter or multimeter. This way, you can test the wire coming from the HVAC programmer (gray usually). It should read about 8 volts when fully cranked.

If you haven't already, check the connection at the blower motor and maybe even apply some dielectric grease. Don't want to be chasing big problems if it'* only little ones.
Old 01-12-2006, 08:40 PM
  #6  
Senior Member
Posts like a Northstar
Thread Starter
 
Jason1351's Avatar
 
Join Date: Jul 2005
Location: Detroit, MI
Posts: 649
Likes: 0
Received 0 Likes on 0 Posts
Jason1351 is on a distinguished road
Default

Already tested the connection at the blower. It'* in my original post.
Is the BCM in the controls or is it in a seperate area? I'll check HVAC programmer tonight at work.
Old 01-12-2006, 08:51 PM
  #7  
Senior Member
True Car Nut
 
randman1's Avatar
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Likes: 0
Received 2 Likes on 2 Posts
randman1 is on a distinguished road
Default

Originally Posted by BillBoost37
The module is located on the blower housing plastic.
Old 01-12-2006, 08:57 PM
  #8  
Senior Member
Posts like a Northstar
Thread Starter
 
Jason1351's Avatar
 
Join Date: Jul 2005
Location: Detroit, MI
Posts: 649
Likes: 0
Received 0 Likes on 0 Posts
Jason1351 is on a distinguished road
Default

Then thats not the problem.
Old 01-14-2006, 02:32 PM
  #9  
Senior Member
Posts like a Northstar
Thread Starter
 
Jason1351's Avatar
 
Join Date: Jul 2005
Location: Detroit, MI
Posts: 649
Likes: 0
Received 0 Likes on 0 Posts
Jason1351 is on a distinguished road
Default

Ok. Switched out the climate control itself and no difference. Checked voltage at the blower, it'* like 1.7-1.9 volts. Freezing my arse off and can't find the problem. This problem sux the most because i work in my car! Anymore suggestions?
Old 01-15-2006, 01:58 PM
  #10  
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Likes: 0
Received 8 Likes on 8 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I'd look to what Randman said. He'* got experience with these. Or consider buying a heavier coat.


Quick Reply: Climat control prob.



All times are GMT -4. The time now is 06:13 PM.