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  #1  
Old 10-10-2008, 11:15 AM
forkintheforest's Avatar
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I'm in need of a W123 wiring diagram, please?

I've searched the forums and have come up with nothing. (Except the diagrams for the windows) I've got the shop manual offline (bitlord) But, I think I'm missing some stuff.
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  #2  
Old 10-10-2008, 12:11 PM
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mmmmmm Diesel...
 
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The POS Haynes manual actually has one.
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70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D
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  #3  
Old 10-10-2008, 12:22 PM
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Junction Box

Ok well more exactly There are two white wires that go to a junction box on the passenger side wheel well . (In front of the battery.) Both of these come from the starter. But I guess on is neg and one is pos. If I put the positive cable from the battery to the starter on the battery without the white wire closest to the juntion box it doesn't short however, if I put it on with that white wire connected it does short (tiny blue spark and crackling sound.) Why does it go to the juntion box? And why is it shorting out?
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'84 300D w/ 120,___
I wish I had money to buy new shocks.
:-(
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  #4  
Old 10-10-2008, 04:23 PM
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Quote:
Originally Posted by forkintheforest View Post
Ok well more exactly There are two white wires that go to a junction box on the passenger side wheel well . (In front of the battery.) Both of these come from the starter. But I guess on is neg and one is pos.
The larger wire from the starter gets a 12 volt feed straight from the battery via the junction box. The smaller wire is connected to the starter switch and triggers the solenoid on the top the starter. When the solenoid engages it applies power from the larger directly connected wire to the coils in the starter motor and makes it spin. There are no negative wires, the car's body and engine are grounded so the starter current simply flows through the engine block back to the ground cable on the battery. I apologize if you already understand all of this and were asking a different question.
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  #5  
Old 10-12-2008, 12:19 AM
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NO No, I didn't thanks though. So then my short is in the ingnition switch?/ Would a shorted ignition switch cause it to arc/spark/make beautiful streaks of light.(not really its small but, visible...and audible.)
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'84 300D w/ 120,___
I wish I had money to buy new shocks.
:-(
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  #6  
Old 10-12-2008, 03:31 AM
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sparks yes

yes it will as soon as what every is hooked to the white wire is shorted to grd. removed the wire and chk with a ohm meter. wire to battery grd. divide and conquer.
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  #7  
Old 10-14-2008, 11:28 AM
LarryBible
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A Haynes Manual can be had for about $20 and it might be the best $20 you ever spend.
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  #8  
Old 10-15-2008, 12:16 AM
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I'm not sure which wire you are trying to connect where so I took a picture of the junction block from my car. The two white wires to the starter can be seen underneath the other wires. The larger wire goes to the larger terminals on the left and is hot all the time. The smaller wire goes to the smaller terminal on the right and gets power when the ignition switch is turned to the start position. If you connect the smaller wire to one of the two terminals on the left you are hotwiring the car and will get a spark because you are engaging the starter. If you get a spark when connecting the wire to the right hand small terminal the problem is that you shouldn't have power to that terminal unless you are starting the car so you most likely have a bad ignition switch or someone has wired something wrong. Hope this helps.
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I'm in need of a W123 wiring diagram, please?-starter_terminal_block_300d.jpg  
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  #9  
Old 10-27-2008, 12:04 PM
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Its been a couple weeks but, I still have not figured outthe problem. I took the starter to autozone to have them test it they said it was good. However when reinstalling it I saw that the smaller guage wires going from the starter to the junction box had rubbed against the chassis causing a short. (One actually looked like it had burn marks on it.) So I wrapped them in electrical tape and reinstalled everything. I connected the positive cable and then the negative cable and it shorted so bad that the metal melted a lil' bit.
Well I tried uploading a pic but the computer isn't reading my sd card.
But my junction box goes something like

/\ To Firewall

|white wire to the starter (goes to bolt that the positive battery cable goes to)
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|One thick and two smaller gauge wires that go through the firewall on pass. side. One of them looks like it was cut.
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|Purple wire and another white wire that goes to the starter but this one has a crew that holds it in.

\/ To front of car
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I wish I had money to buy new shocks.
:-(
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