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 10-18-2000, 04:43 PM
Steve7
Guest
 
Posts: n/a
I have a 1986 300E w/131k.

For sometime now when I drive at night intermitantly the headlights and dash lights becomes brighter- then back to normal. Also, occaissionally my SRS indicator light would flicker on/off - but very faintly. I was ignoring this minor issue.

Today, however, -in the rain- my wipers stopped working and so did my power windows.

The fuses seem fine, and all other electronics seem OK. Any Ideas?????


-Steve7

Reply With Quote
  #2  
Old 10-18-2000, 06:50 PM
LarryBible
Guest
 
Posts: n/a
I would suggest that you start by checking for good battery terminal connection. Next I would put a voltmeter across the battery. The voltage should be around 12 volts before starting, and come up to somewhere around 13.5 volts with engine running. If the voltage does not come up after starting, the alternator is probably not charging.

Good luck,

------------------
Larry Bible
'01 C Class, Six Speed
'84 Euro 240D, manual, 533K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles
Reply With Quote
  #3  
Old 10-18-2000, 07:06 PM
J.HIDALGO's Avatar
Registered User
 
Join Date: Jul 1999
Location: Jax, FL
Posts: 1,785
Check the brushes in the back of the alternator. Remove 2 screws and just pull them out. If they are really short, most likely, that is your problem. They are not expensive (depending where you get them).
Good luck!

------------------
J.H.
'86 300E
Reply With Quote
  #4  
Old 10-18-2000, 07:17 PM
Registered User
 
Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
Have the charging system checked. Something sounds intermittent. Also OVP relay may be suspect...

------------------
Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
Reply With Quote
  #5  
Old 10-18-2000, 10:18 PM
Steve7
Guest
 
Posts: n/a
quote:
Originally posted by jeffsr:
Have the charging system checked. Something sounds intermittent. Also OVP relay may be suspect...




Thanks for the advice all--

The charging system is a good start point.
And that likely explains the intermitant lights,etc. But how do I explain the wiper and power windows failure. Certainly if there is enough juice for the head-lights and radio I could run the wipers- right?

Jeff - what is this OVP relay you mention?

Thanks again. Any further ideas gratefully accepted.

-Steve7
Reply With Quote
  #6  
Old 10-19-2000, 11:35 PM
Ronald Pantin
Guest
 
Posts: n/a
Yeah jeff what is a ovp relay (over voltage protection) maybe! and if it is where is it located.
Reply With Quote
  #7  
Old 10-20-2000, 11:24 AM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Fuse #2 is the common link between these two systems. Verify with a voltmeter that both sides of the fuse stay hot while trying to operate either system. In other words be sure to test it with a load on it.
Reply With Quote
  #8  
Old 10-20-2000, 08:41 PM
Registered User
 
Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
The overvoltage protection system, is there to protect all of the electronic systems in the car which can be damaged by inductive or unregulated voltage spikes. It's a combination fuse and relay which has a sensing circuit that shunts or damps voltage spikes so they don't wreck all the computer modules in your MBZ's and cost you great volumes of $$$ and aggravation. If this component is not working properly, it can affect any number of systems in the car, including engine and fuel management systems. Can produce a ton of weird symptoms related to electrically controlled components.

------------------
Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE

[This message has been edited by jeffsr (edited 10-20-2000).]

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
300e trans shift problem question MBZ OE Tech Help 7 07-10-2004 09:08 PM
87 300e clicking from valves? and tranny problem dirtysocks Tech Help 1 05-26-2004 01:08 AM
Mystery Electrical Problem URGENT mudditt Tech Help 8 02-14-2003 09:33 PM
What is the most common Benz? vanakin Off-Topic Discussion 14 12-07-2002 05:34 PM
Solution to my 87 300E flooding problem jrodimer Tech Help 2 02-19-2002 12:09 PM



All times are GMT -4. The time now is 09:04 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