1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Blower Fan Diagnostics

Thread Tools
 
Search this Thread
 
Old 03-12-2004, 02:10 AM
  #1  
Senior Member
True Car Nut
Thread Starter
 
Allmachtige's Avatar
 
Join Date: Sep 2002
Location: Genoa, Illinois
Posts: 4,013
Likes: 0
Received 0 Likes on 0 Posts
Allmachtige is on a distinguished road
Default Blower Fan Diagnostics

My blower fan for my climate control stopped working and I tried the following.
First off I test voltage at the harness and still got 9.5 volts on high speed, then I applied direct 12v from the battery and the fan started right up. All fuses and relays related to the blower check through fine. So what can it be? Blower module doing wacky things or what?
Old 03-12-2004, 02:25 AM
  #2  
Senior Member
Certified Car Nut
 
J Wikoff's Avatar
 
Join Date: Mar 2003
Posts: 12,433
Likes: 0
Received 2 Likes on 2 Posts
J Wikoff is on a distinguished road
Default

So, you got 9.5 volts where? Between the climate control and the blower, or before the climate control?
Old 03-12-2004, 02:32 AM
  #3  
Senior Member
True Car Nut
Thread Starter
 
Allmachtige's Avatar
 
Join Date: Sep 2002
Location: Genoa, Illinois
Posts: 4,013
Likes: 0
Received 0 Likes on 0 Posts
Allmachtige is on a distinguished road
Default

At the harness connector that connects into the fan'* connector.
Old 03-12-2004, 02:35 AM
  #4  
Senior Member
Certified Car Nut
 
J Wikoff's Avatar
 
Join Date: Mar 2003
Posts: 12,433
Likes: 0
Received 2 Likes on 2 Posts
J Wikoff is on a distinguished road
Default

So between the harness and the fan, power was lost. Did you check ALL the wiring? Make sure the fan'* end of the wire in the harness made contact with the lead from the other end of the harness.
Old 03-12-2004, 02:37 AM
  #5  
Senior Member
True Car Nut
Thread Starter
 
Allmachtige's Avatar
 
Join Date: Sep 2002
Location: Genoa, Illinois
Posts: 4,013
Likes: 0
Received 0 Likes on 0 Posts
Allmachtige is on a distinguished road
Default

Uhh...getting confused. Basically make sure the harness connector is making contact with the leads on the blower fan itself?
Old 03-12-2004, 02:41 AM
  #6  
Senior Member
Certified Car Nut
 
J Wikoff's Avatar
 
Join Date: Mar 2003
Posts: 12,433
Likes: 0
Received 2 Likes on 2 Posts
J Wikoff is on a distinguished road
Default

Sorry, the leads in the harness itself, do they all make contact? One get pulled out, bent, etc.
Old 03-12-2004, 02:45 AM
  #7  
Senior Member
True Car Nut
Thread Starter
 
Allmachtige's Avatar
 
Join Date: Sep 2002
Location: Genoa, Illinois
Posts: 4,013
Likes: 0
Received 0 Likes on 0 Posts
Allmachtige is on a distinguished road
Default

K, I think I got you now. Tomarrow I'll pick at the prongs inside the harness connector and pull them "out" a little to make sure the blower leads make a good connection. Otherwise what other connectors to check? The back of the ECC (electronic climate control) itself?
Old 03-12-2004, 02:49 AM
  #8  
Senior Member
Certified Car Nut
 
J Wikoff's Avatar
 
Join Date: Mar 2003
Posts: 12,433
Likes: 0
Received 2 Likes on 2 Posts
J Wikoff is on a distinguished road
Default

Yeah, check the ECC. What voltage does the fan run on anyway? I'm assuming 12v is full speed, is 9.5 middle of the range?
Old 03-12-2004, 01:49 PM
  #9  
Senior Member
True Car Nut
 
fuddyduddy121's Avatar
 
Join Date: Sep 2002
Posts: 3,392
Likes: 0
Received 0 Likes on 0 Posts
fuddyduddy121 is on a distinguished road
Default

This one is a stumper because there is voltage at the fan harness and the fan runs when voltage is applied to it. Therefore it has to be a bad connection at the fan, doesn't it?

I might be tempted to remove the pins from the harnesses and touch them together to test/ensure a proper connection.
Old 03-12-2004, 02:30 PM
  #10  
Senior Member
True Car Nut
Thread Starter
 
Allmachtige's Avatar
 
Join Date: Sep 2002
Location: Genoa, Illinois
Posts: 4,013
Likes: 0
Received 0 Likes on 0 Posts
Allmachtige is on a distinguished road
Default

Wouldn't I get a spark (potentially bad?) if I touched the harness pins together?


Quick Reply: Blower Fan Diagnostics



All times are GMT -4. The time now is 01:52 PM.