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-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-16-2004, 01:04 AM
Registered User
 
Join Date: Feb 2004
Location: southern U.S.
Posts: 9
Abs Warning Light Problem

ABS WARING LIGHT PROBLEM

On my '84 500SEL, I have recently had the ABS warning light come on. I pulse tested the front sensors and they checked "good". The car is not specific as to when the light will come on. It can drive for an hour at 75mph and then the light will trip or on other occasions the car can go for 5-10 min at 40-45 mph and then come on. The light will reset when the car is turned off and then restarted, or it will rest when the OVP relay is removed while the motor is still running.

Could this be that the OVP relay is the original from '84, and should it be changed to the newer version, or is it something totally else.

Please help.

Thanks

Reply With Quote
  #2  
Old 11-16-2004, 08:18 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Cool

Sounds like you are having a problem with one of the sensors going open circuit for a split second. The pre-1990 cars had a lot of that type of problem. WE always test the sensors in 2 or 3 ways including a "yank" test on the wires with an OHM meter connected.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #3  
Old 11-16-2004, 07:43 PM
Cigar Havana's Avatar
Registered User
 
Join Date: Jan 2003
Location: London Ontario Canada
Posts: 382
Ohm meter

I recommend connecting the ohm meter, then wiggling each wire, especially near the wheel. If you see the meter move while wiggling, you found the problem.
__________________
1989 420 SEL
Reply With Quote
  #4  
Old 11-16-2004, 07:49 PM
Gilly's Avatar
Registered User
 
Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
You can also just ohm it while turning the fron wheels left and right. Do you ever notice the light coming on after making a turn or going over a bump?
Gilly
Reply With Quote
  #5  
Old 11-16-2004, 09:35 PM
Registered User
 
Join Date: Oct 2001
Location: around Charlotte NC
Posts: 586
where to connect meter

Folks,

How / where do you connect the meter. I haven't looked at the sensors yet, but is there a connector that unplugs for this?

Thanks,
Chuck
Reply With Quote
  #6  
Old 11-17-2004, 01:15 AM
Registered User
 
Join Date: Feb 2004
Location: southern U.S.
Posts: 9
As Gilly asked whether or not, does the sensor light come on while the wheels are being turned-no. But I think I have noticed that the sensor has tripped while going over a bumper or two. Could you tell me what this means?

The rear sensor to the diff is the only one I haven't ohmed yet, since I wanted to avoid removing the rear seat.

To answer the last posted question, the connectors for the ABS to the front wheels are located in front of the battery area , in front of the partitioned firewall. It is set in a clip holder with the two front leads secured in place.

Thanks for any more additional help.

Reply With Quote
Reply

Bookmarks

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 04:15 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page