Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 07-29-2004, 04:30 PM
Registered User
Join Date: Feb 2003
Posts: 6
Aux Cooling Fans- 1995 SL 500

My electric Aux. cooling fans are not working. I tested the fans using an outside 12 volt source and the fans themselves work just fine. I tested the CTS sensor with an ohm meter. My info states that the resistance should equal 310 ohms at 100 degrees (C) for the fans to begin their low speed operation. The fans should fully operate at 200 ohm at 115 degrees (C).

My CTS specs are a bit off, but at 120 degrees (C), the sensor is reading 240 ohms. That should have signaled the fans to run since they do operate at any resistance less than 310 ohms. Even at that temperature and resistance, the fans still won't operate. (Even with the A/C on.)

What am I missing here? The fuses are good and the fans themselves are good. Is there a fan relay buried somewhere in the system that has malfunctioned? Is the computer that controls the thing bad? I also saw a listing for a part called a "Aux Fan Resistor". Can any body tell me where that is located?

Reply With Quote
Old 07-29-2004, 04:47 PM
Registered User
Join Date: Sep 2003
Location: Dallas, Tx
Posts: 701
On my 97 SL there is a ceramic resister mounted in between the fans, it is white. I don't know if yours is there, but mine is. Good luck!
Happy Benzing
Reply With Quote
Old 07-29-2004, 07:01 PM
Registered User
Join Date: Feb 2003
Posts: 6
Thanks for the info on the resister. I haven't had time yet to dig into it, but there does appear to be a white resistor like item mounted to the inside of the grill between the fans. I'll check that out.
Reply With Quote
Old 07-29-2004, 09:41 PM
Registered User
Join Date: Aug 2002
Location: south-east missouri
Posts: 75
aux cooling fans

I do not remember exactly, but I did a search on here and found it when I had the problem. There is a relay with a fuse under the fuse box. Dairel
Reply With Quote
Old 07-29-2004, 10:02 PM
Registered User
Join Date: Feb 2003
Posts: 6
Thanks Dairel. The white resistor listed in the other post didn't solve the problem. I'll see if I can locate the relay in the morning.

Thanks again!
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 06:56 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page