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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-24-2017, 12:11 AM
Turbo190D's Avatar
1987 190D Turbo
 
Join Date: May 2017
Location: AL, USA
Posts: 148
Cluster LEDs - how did you determine polarity?

While I had the cluster out of my car I was planning to swap all the lights out with LEDs. I did this in my 86 hardbody and it made a huge difference in visibility and they'll of course last much longer. Anyway, in my truck I just put them in, if the light didn't work, I yanked the cluster and reversed it. Is that the best way to do it in these cars as well, or does someone have a pinout/diagram of the cluster that shows the polarity of the contacts around the lights?

__________________
2010 Mercedes E350 4Matic - 77k miles
1986.5 Nissan D21 V6 4x4 - 276k miles
1987 Mercedes 190D 2.5 Turbo - 3??k miles
1983 Mercedes 300SD turbo parts car
2017 Honda CBR500R - 15k miles
2016 Suzuki GSX S1000 - 9k miles



Reply With Quote
  #2  
Old 08-24-2017, 12:37 AM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
With a DMM (Digital Multi Meter)

1.You CAN easily figure out polarity (I.C. (Instrument Cluster) plugged in Of Course!

2. Wiring Diagram pertinent to your chassis will show + or - .

Look around Rev190 W201
__________________
'84 300SD sold
124.128
Reply With Quote
  #3  
Old 08-24-2017, 12:00 PM
funola's Avatar
Registered User
 
Join Date: May 2005
Location: NYC
Posts: 8,243
Reversing polarity will not damage LEDs, so yes, that is the way to do it. When it lights up, polarity is correct.
__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked
Reply With Quote
  #4  
Old 08-27-2017, 11:02 AM
Turbo190D's Avatar
1987 190D Turbo
 
Join Date: May 2017
Location: AL, USA
Posts: 148
Alrighty, I'll stick to that method then.
__________________
2010 Mercedes E350 4Matic - 77k miles
1986.5 Nissan D21 V6 4x4 - 276k miles
1987 Mercedes 190D 2.5 Turbo - 3??k miles
1983 Mercedes 300SD turbo parts car
2017 Honda CBR500R - 15k miles
2016 Suzuki GSX S1000 - 9k miles



Reply With Quote
  #5  
Old 08-28-2017, 03:15 PM
Registered User
 
Join Date: Feb 2011
Location: Redding, California
Posts: 229
Just FYI, I converted to LED's and had continual lighting issues on the cluster. Finally just pulled them all out and went back to incandescents. Became an expert at pulling that cluster. Thirty one times best I recall. Always pulled the steering wheel off and worked through the left vent. Pretty easy after you've done it a few. LED's in most other places on the car work fine but that cluster was hell!
Reply With Quote
  #6  
Old 08-28-2017, 03:26 PM
Turbo190D's Avatar
1987 190D Turbo
 
Join Date: May 2017
Location: AL, USA
Posts: 148
Oh? Would you mind sharing the nature of the problems?
__________________
2010 Mercedes E350 4Matic - 77k miles
1986.5 Nissan D21 V6 4x4 - 276k miles
1987 Mercedes 190D 2.5 Turbo - 3??k miles
1983 Mercedes 300SD turbo parts car
2017 Honda CBR500R - 15k miles
2016 Suzuki GSX S1000 - 9k miles



Reply With Quote
  #7  
Old 08-28-2017, 04:35 PM
funola's Avatar
Registered User
 
Join Date: May 2005
Location: NYC
Posts: 8,243
Quote:
Originally Posted by Bob338 View Post
Just FYI, I converted to LED's and had continual lighting issues on the cluster. Finally just pulled them all out and went back to incandescents. Became an expert at pulling that cluster. Thirty one times best I recall. Always pulled the steering wheel off and worked through the left vent. Pretty easy after you've done it a few. LED's in most other places on the car work fine but that cluster was hell!
It cannot be inherent issue with LED's, must be a contact issue between LED and the socket or the socket to the cluster. Try cleaning the socket contacts with 600 grit wet dry paper and the pcb traces with an eraser.
__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked
Reply With Quote
  #8  
Old 08-28-2017, 07:09 PM
Registered User
 
Join Date: Feb 2011
Location: Redding, California
Posts: 229
Quote:
Originally Posted by Turbo190D View Post
Oh? Would you mind sharing the nature of the problems?
Can't truly remember so I can't help. It may have all been 'operator error'. There was a guy over at one of the 201 boards that had done it with no problems, and that's what enthused me, so I went ahead. Happened about 8 years ago so details are murky.
Reply With Quote
  #9  
Old 08-31-2017, 12:19 AM
Registered User
 
Join Date: Aug 2010
Location: Sacramento, CA
Posts: 2,629
I put LED's in my 84 & 85 300D. I used cheap Chinese ones from ebay. A few failed, but most are still working after ~3 yrs. A couple things of notes:

Some LED's have contacts which will short out the M-B bulb holder. That will smoke a trace on the cluster's circuit board. Look close and test w/ an ohmmeter to avoid.

Some LED's will not fit, even though sold as the correct bulb#. I recall this was true of some small ones for the push-button switch. They have a square board which doesn't quite fit in the round hole.

For the light tunnels in a W123, use LED's w/ forward shining diodes. Those light the speedometer much better than incandescent bulbs did.

The current draw of the "BATT warning" bulb is used to boot-up the alternator, along w/ 2 other dash bulbs. My LED's don't draw quite enough for that, but once I rev the engine >1200 rpm, the alternator boots-up and the bulbs go out. That is probably due to residual magnetism in the armature. If that bothers you, use an incandescent bulb there.
__________________
1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans
Reply With Quote
  #10  
Old 08-31-2017, 04:18 AM
cho's Avatar
cho cho is offline
diesel power
 
Join Date: Dec 2011
Location: Europe
Posts: 933
Quote:
Originally Posted by Bob338 View Post
Always pulled the steering wheel off and worked through the left vent. Pretty easy ....
too much work in this procedure

just unscrew left (driver) side speaker and push cluster out by hand. POC


.
__________________
w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded
next wish/project: w114 coupe OM603 powered
Reply With Quote
  #11  
Old 08-31-2017, 12:02 PM
Turbo190D's Avatar
1987 190D Turbo
 
Join Date: May 2017
Location: AL, USA
Posts: 148
Thanks for the info Bill. I think I'll just replace the "heavy use" items with LEDs and leave the rest of them.
__________________
2010 Mercedes E350 4Matic - 77k miles
1986.5 Nissan D21 V6 4x4 - 276k miles
1987 Mercedes 190D 2.5 Turbo - 3??k miles
1983 Mercedes 300SD turbo parts car
2017 Honda CBR500R - 15k miles
2016 Suzuki GSX S1000 - 9k miles



Reply With Quote
  #12  
Old 08-31-2017, 02:42 PM
Registered User
 
Join Date: Feb 2011
Location: Redding, California
Posts: 229
Quote:
Originally Posted by cho View Post
too much work in this procedure

just unscrew left (driver) side speaker and push cluster out by hand. POC


.
Can you see, and find, all the connections? Some of those don't reach after you can get your hands into the cluster opening.
Reply With Quote
  #13  
Old 09-01-2017, 05:04 AM
cho's Avatar
cho cho is offline
diesel power
 
Join Date: Dec 2011
Location: Europe
Posts: 933
.

yes easy..when pushed out just access from clusters right bottom side and disconnect...


note: my hands are "highlander" type so I guess anyone can do it

cheers

.

__________________
w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded
next wish/project: w114 coupe OM603 powered
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 05:50 AM.


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