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 01-31-2008, 06:31 PM
retx's Avatar
Registered User
 
Join Date: Nov 2006
Location: Charleston WV
Posts: 476
Junction box on inner fender for checking starter?

Ive looked through the fsm and cant seem to find any mention of it. Ive read on other posts that its on the right (passenger) fenderwell. I cant seem to find one over there at all. Im still having issues with getting the starter to engage. Currently, nothing, not a thing, happens when the key is turned fully. First postion of the key gives me all dash lights and glow, but nothing when turned to postion two. Headlights dont dim much, lights inside stay bright when i attempt to crank it.
So in trying to rule out a bad starter, im looking for this junction box. Do some models have them on the left (drivers) side? i have one there just behind the washer tank.

__________________
1980 300D
Reply With Quote
  #2  
Old 01-31-2008, 06:52 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
Never heard of one on the left fender. Some 123's don't have the junction box.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #3  
Old 01-31-2008, 09:38 PM
retx's Avatar
Registered User
 
Join Date: Nov 2006
Location: Charleston WV
Posts: 476
Ah, so some dont have them at all. Does anyone have a pic of the box, just so i have a visual?
And what would that box be on the drivers side? A multiconnector in there, and three screw connectors, two are jumped together and one on the lower right corner.
__________________
1980 300D
Reply With Quote
  #4  
Old 01-31-2008, 11:29 PM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
If you don't have a junction box, very close, and just in front of, the battery, you'll need to use the start screws, check pic.
With a junction box, I use the first and third screw, trial and error, works.
Attached Thumbnails
Junction box on inner fender for checking starter?-new-036.jpg  
__________________
83 SD

84 CD
Reply With Quote
  #5  
Old 02-01-2008, 05:44 PM
retx's Avatar
Registered User
 
Join Date: Nov 2006
Location: Charleston WV
Posts: 476
Interesting, i guess my car doesnt have the junction box at all, nor does it have the two screws toomany is referring to (unless youre meaning the two on the solenoid).
This is the closest box i could find with exposed screws. On the left side though, behind washer bottle. Cant find anything in the fsm about what this is.
Attached Thumbnails
Junction box on inner fender for checking starter?-box.jpg  
__________________
1980 300D
Reply With Quote
  #6  
Old 02-01-2008, 05:48 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
Glow plug relay. That's the 80amp glow plug fuse visible in that box.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #7  
Old 02-01-2008, 05:55 PM
retx's Avatar
Registered User
 
Join Date: Nov 2006
Location: Charleston WV
Posts: 476
ah. ok. are they all supposed to be 80a? this one has 60a printed on the side.
thanks for clearing that up though.
__________________
1980 300D
Reply With Quote
  #8  
Old 02-01-2008, 05:56 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
the 80 123 should have the box on the frame down low, not on any fender. on the passenger's side. easiest way to find it is to follow the wire from the alternator. it goes right to it.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #9  
Old 02-01-2008, 06:10 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
Quote:
Originally Posted by vstech View Post
the 80 123 should have the box on the frame down low, not on any fender. on the passenger's side. easiest way to find it is to follow the wire from the alternator. it goes right to it.
That little nugget of information helped me find the junction box for the W116 under the battery tray. It's hard to see and it wouldn't be easy to jump the terminals there and I can't tell if it has three terminals or two. Anyone know if the SD is jumpable at the terminal block under the battery tray? If so which terminals need to be jumped?
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #10  
Old 02-01-2008, 06:24 PM
junqueyardjim's Avatar
Registered User
 
Join Date: Apr 2005
Location: Cicero, Hamilton County, Indiana about 30 miles north of downtown Indianapolis
Posts: 2,623
It's easy to find out

Take a needle nose plier and touch two of the terminals. Switch does not have to be on unless you are trying to start it. If touching two terminals doesn't produce results, try the other set up. You might see a few sparks, but they are harmless. Might even make you jump if you were not expecting it. You have to put that needle nose into the screws pretty good if you want to crank it up. Just touch briefly if you want to move the engine when doing a valve adjustment.
__________________
Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!
Reply With Quote
  #11  
Old 02-01-2008, 06:30 PM
retx's Avatar
Registered User
 
Join Date: Nov 2006
Location: Charleston WV
Posts: 476
Following the wiring from the altenator leads me under the battery tray, which i then removed, but they just disappear into an opening. No terminal block or junction box. I was finally able to locate a screwdriver long enough to make it all the way down past the manifold to reach the solenoid. Starter does turn over at normal speed. So its not the starter, new battery or new cables/ends. In the daylight tomorrow ill crawl under to see if the ground strap is fubar'd. On the 123 where "should" it be?
__________________
1980 300D
Reply With Quote
  #12  
Old 02-01-2008, 06:31 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
It's awkward to reach. Probably would have to remove the air cleaner to turbo plastic U thingamajob in order to jump the terminals, so I was wondering if anyone else has experimented.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Last edited by kerry; 02-02-2008 at 12:16 AM.
Reply With Quote
  #13  
Old 02-01-2008, 09:18 PM
bulletproofair's Avatar
bulletproof air
 
Join Date: Sep 2007
Posts: 87
This "Junction Box" is located on the passenger side fender inside the engine bay. There are 5 screws holding down wires to the starter and the alternator along with the battery and some other acc\power wires I believe. The screws are under the pop up lid and its just a little plastic box that's black.

You can jump the terminal closest to the windshield with the terminal 2nd from the front of the car and it should engage the starter. If its wired different for some reason just look for the wire going to the starter and a wire with power then jump them I think.

If starter doesn't engage then your starter is bad or solenoid is.

Hope this helps and clears things up for everyone. I always encourage accurate information to be spread.

If you don't have everything wired up correctly in this terminal box your car most likely won't turn over\start or some electronics may have problems or not work.

Good Luck.
Attached Thumbnails
Junction box on inner fender for checking starter?-sany0032.jpg  
__________________
---------------------
1974 240d "Peace, Love and Empathy" - Kurt Cobain
1982 300sd "It all depends upon the Benz!" - Me

1983 300sd
1985 500sel

1992 300se

Reply With Quote
  #14  
Old 02-01-2008, 10:04 PM
retx's Avatar
Registered User
 
Join Date: Nov 2006
Location: Charleston WV
Posts: 476
That box does not exist on my car obviously, as kerry has mentioned. Ive searched the entire bay from the fenderwell to the suspension. It just does not exist. My starter is fine. It has to either be the switch, nss, or ground strap.
__________________
1980 300D
Reply With Quote
  #15  
Old 02-01-2008, 10:19 PM
Registered User
 
Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,585
Quote:
Originally Posted by toomany MBZ View Post
If you don't have a junction box, very close, and just in front of, the battery, you'll need to use the start screws, check pic.
With a junction box, I use the first and third screw, trial and error, works.
On my 85 300D, it`s wired to jump the middle screw and the front one.

If the neutral safety goes bad, you can start the car by jumping here
also.

Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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 06:05 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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