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Ignition - Non-polar plug on Contact switch

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190E (W201) 1982-1993: 190E 2.3, 190E 2.6, 190E 2.3-16, 190E 2.5-16, 190 D 2.2, 190 D 2.5, 190 D 2.5 TURBO, 190E 2.5-16 Evolution I, 190E 2.5-16 Evolution II

Ignition - Non-polar plug on Contact switch

 
Old 03-25-2013, 04:19 PM
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1986 190E 2.3
Ignition - Non-polar plug on Contact switch

Hey guys,
in the course of removing the ignition in my '86 I unplugged a cable that I'm now not sure of how to put back together. I've no experience w/ this kind of stuff, but was very careful to be sure I was taking notes so that I wouldn't mess up the polarities of any of the wires I removed. However, I started noticing that just about every single plug was polar, and got careless towards the end when I was removing plugs from the contact switch (little black box) attached to the ignition. The ignition's all healed up now, but i can't figure out the appropriate polarity for this &*$#&*@#*)&(#@ wire, and cannot find it anywhere in the electrical diagrams provided in the service manual.

At one the end of the contact switch are 2 black wires that lead to a (polar) plug, which attaches to one br/wh wire, and one br wire. On the other (problem) end of the switch are two male prongs, which are intended to attach to a white receiver w/ one red wire, and one red/gr wire.

I can take some pictures if the description isn't clear enough. Thanks in advance for any help guys!
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Old 04-06-2013, 01:03 AM
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1987 190E 2.3
If it is just a contact switch it shouldn't matter how the plug is connected
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Old 12-16-2013, 12:20 PM
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1993 190E mercedes benz
Originally Posted by Gullwing View Post
If it is just a contact switch it shouldn't matter how the plug is connected
Can you tell me what is that contact for, i have same issue.
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Old 12-27-2013, 09:41 AM
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Originally Posted by ejgrimes002 View Post
Can you tell me what is that contact for, i have same issue.
Found it is just a key buzzer.
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