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

LinkBack Thread Tools Display Modes
Old 07-19-2010, 03:03 PM
Registered User
Join Date: Apr 2002
Posts: 15
ABS light on, no speedometer...desperately need help

I have 1993 300SE. At the beginning the ABS light illuminated a couple of minutes after starting engine, then no speedometer and heavy steering. It went off after cycling the ignition,did like this 3 or 4 times and now is on all the time. I checked front left ABS sensor, it shows about 1000 Ohms resistance and generating voltage when I spin the rotor. Sensor wiring checked OK. Both front ABS sensors cleaned. There is a strange thing: no way to retrieve fault codes from the ABS module with LED-and-button tester. When I connect the testing wire to the pin #6 of 38-pin socket(ignition on of course), it's glowing the dim light and no codes whatsoever, no matter how I push the button. Another strange thing: base module (pin# 8)consistently gives fault code 12, which means blown F1 fuse, BUT the F1 fuse is OK and there is a steady onboard voltage on both sides of the fuse. By the way the voltage is 12.92 ignition on and 14 volts engine running. I changed ABS module with another one from a reputable junk yard, no changes, ABS light still on. Please, help

Reply With Quote
Old 07-19-2010, 04:00 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Sounds like the base module isn't supplying power to the ABS module.
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
Old 07-19-2010, 04:23 PM
ps2cho's Avatar
Registered User
Join Date: Jun 2006
Location: Chandler, Arizona
Posts: 3,523
Does the ABS function?
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k
Reply With Quote
Old 07-19-2010, 08:54 PM
Registered User
Join Date: Apr 2002
Posts: 15
Originally Posted by M.B.DOC View Post
Sounds like the base module isn't supplying power to the ABS module.
Indeed. There is a voltage on the fuse F1, but no voltage on the pin 8 of the base module, which is supplying power to the ABS module. There is a relais between the fuse and pin 8 which(relais) for some reason is not functioning. Should I replace the base module altogether or can I bypass this relais and connect the fuse to the pin 8 directly? Thanks a lot for your priceless help.
Reply With Quote
Old 07-19-2010, 09:18 PM
Registered User
Join Date: Apr 2002
Posts: 15
Originally Posted by ps2cho View Post
Does the ABS function?
I don't think it can function without power

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 11:55 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, 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