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.

1995 3800-sc Cooling fans not working

Thread Tools
 
Search this Thread
 
Old 03-16-2012, 12:23 PM
  #1  
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
vektron1961's Avatar
 
Join Date: Sep 2010
Posts: 13
Likes: 0
Received 0 Likes on 0 Posts
vektron1961 is on a distinguished road
Default 1995 3800-sc Cooling fans not working

I know a 1995 Bonneville with a Supercharger normally runs hot but I am at the point were I am afraid to get stuck in any traffic as the temperature rises as soon as I slow down.
I checked my fans with the motor running very hot and neither one was running.
Is there a fuse somewhere for these are a whey to check the fans. I dought they would both go bad at the same time.
Old 03-16-2012, 12:58 PM
  #2  
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Received 579 Likes on 497 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

the fuse id probably pass side underhood fuse block. try turning on the a/c i think one or both are supposed to come on with the a/c. could be a relay too.
Old 03-16-2012, 02:25 PM
  #3  
Retired



Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Dark Side, AZ
Posts: 17,920
Received 1,780 Likes on 1,304 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

On your 95, the low speed fans will kick on at 212 degrees. The high speed fans will kick on at 226 degrees.

To test if the PCM will turn them on...
Have engine running.
Disconnect the Engine Coolant Temperature electrical connector. When the PCM sees an OPEN connection to the ECT sensor, it will go into SAFE mode and automatically turn the fans on.

This is the sensor that sits right below the upper radiator hose on the engine. Or right above the exhaust crossover pipe.
__________________
Retired Administrator
2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel

Old 03-16-2012, 02:26 PM
  #4  
Retired



Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Dark Side, AZ
Posts: 17,920
Received 1,780 Likes on 1,304 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Also, this will cause your Check Engine Light to come on. But this will clear itself out once you reconnect it and complete a couple start/drive cycles. Or you can clear it by disconnecting the battery for a few mins.
__________________
Retired Administrator
2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Carlton
Pontiac
12
03-31-2011 04:31 PM
gmlvr39
Everything Electrical & Electronic
7
07-16-2009 11:08 AM
Bonneville94_03
Everything Electrical & Electronic
2
01-30-2009 06:51 AM
showshocka2k
1992-1999
21
03-15-2007 10:16 AM
coopsse
1992-1999
6
01-12-2007 12:14 PM



Quick Reply: 1995 3800-sc Cooling fans not working



All times are GMT -4. The time now is 08:56 PM.