PeachParts Mercedes-Benz Forum - Ignition Switch Plug Wiring help needed

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Ignition Switch Plug Wiring help needed

:mad: HELP!!!!!!!! I have an 81 300SD that someone has cut the wiring off the ignition switch plug. I recently picked up another plug, but it doesn't have any of the ends in it to try to match up the wires. I was wondering if anyone knows how the wiring hooks back up to the plug. There is a squared part on the plug with the number 1 cast in the plastic. Directly below the 1 is a 30 by the hole there. Going clockwise the numbers are 50, 15R, P30, 15, 30, and 15X. I have 2 RED wires, 1 PUR, 1 GRN/ WHT, 1 BLK/RED, 1 RED/YEL, 1 RED/GRN that go in the plug. Does anyone know what order they go in? Any help would be greatly appreciated. Thanks for any help you can give me.

I don't have this off the top of my head and someone here will likely have a manual to address this. But, if someone cut the wiring off the plug, are there remnants inside the plug you can match up to? Jim

Thanks for your response Jim but the end of the plug was cut off. All the connectors were removed from the plug so I have nothing to go by at all. I recently got the plastic piece but it also has no connectors in it. So if there is anyway you can help me out it would be appreciated. Thanks, Mike

If you have better than a dial-up connection try this for on-line service manuals and wiring diagrams-http://mb.braingears.com page 5 is what you are looking for.

(I have done it on dial-up but expect to wait a lo-o-ong time for all the pages to download in pdf format.) If you can't get it to work, let me know and we'll make a wiring list.;)

I'm reading from the '83 manual.

The terminal numbers are practically illegible, so, take the following with the understanding that it might not be perfect:

There are three wires that are connected to the "run" contact.

They are:

red/black stripe........connected to socket 15
red/green stripe........connected to socket 15R
red/yellow stripe.......connected to 15X

There are two supply wires:

Both are 4mm red wires and each goes to socket 30. There are two of them.

The start contacts go to the violet/white stripe. I cannot read the socket number.

The accessory contacts go to green/white stripe. Again, I cannot read the socket number.

Please check with a continuity tester to be sure the colored wires match the contacts for each function. The socket numbers may be iffy but the functions and wire colors should match.

The Violet/White goes to #50. It is the starter wire

Quote:

Originally Posted by Brian Carlton (Post 1333129)

The wiring and positions are the same for the 81-85 300SD models

The Violet/White goes to 50 (starter)
The Green/White goes to 30P