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 09-25-2012, 01:35 PM
Registered User
 
Join Date: Jul 2008
Posts: 3
Unhappy AC & Tach not working in '85 300TD

This problem started when the AC & Tach would shut off after 10-15 min. after a cold start. While searching for the source of the problem, I resoldered the PCBs in both the overload voltage relay (126 540 47 45; up under the dash to the right) and the Klima relay(001 545 74 05), cleaned with Scotchbrite and lubed with conductive grease all electrical pins and now the AC & Tach won't work even upon a cold startup. I obtained a new replacement overload voltage relay (201 540 08 45) and the problem is that the replacement is a 5-pin relay whereas the original is a 4-pin relay and the female socket for this relay is a 4-pin and won't accept the 5-pin relay so I can't even test this to see if the replacement will solve my AC & Tach problem(s). There's a fellow from the Classic Center trying to sort this out for me at the moment, but I thought I'd post this "in progress" problem.


Last edited by GMBrown; 09-25-2012 at 01:37 PM. Reason: forgot to add part re: Klima
Reply With Quote
  #2  
Old 09-26-2012, 10:51 AM
Hit Man X's Avatar
I LOVE BRUNETTES
 
Join Date: Sep 2004
Location: FUNKYTOWN
Posts: 9,087
Thumbs up

When I had A/C issues on my SD, my Klima relay had a bad trace on the PCB.

The tach is driven off that EGR computer, in the W126 it is in the passenger kick panel area. W123 I have no idea.

I am sure you could just jump the OVP with a length of fused wire.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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 10:14 AM.


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