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  #1  
Old 03-14-2013, 09:57 PM
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Join Date: Jul 2011
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Why two starter solenoid wires?

On most cars, other than the large battery cable, there is only one wire going to the starter solenoid.
On MBs, there are two. I am about reinstall the starter (easy with the heads off :-), so I need to know which one goes where, and am also wondering what the other wire does.
Thanks,

Csaba
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Old 03-15-2013, 08:28 AM
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one is for the solenoid the other I believe is part of the resistor bypass ignition circuit, so that when cranking the coil sees 12V.
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R107.043 Euro 350SL (parts)(crushed)
W116.024 280se (crushed)
W114 280 (m110)
W108.067 280se 4.5
W108.068 280seL 4.5 (crushed)
W111 220SEB coupe
W110 200D went to the crusher
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1970 Rover P6B

Used to own(1950 buick,1969 lincoln MK3,4G63t colt,87 300ZX, 79 F100, 92 XJ40)
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Old 03-15-2013, 04:54 PM
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OK, thanks, then it does not matter which on goes where.

Csaba
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Old 03-25-2013, 03:45 PM
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It does matter which goes where.

One will, when 12 volts is applied, pull in the solenoid. The other, when the solenoid is pulled in, will supply 12 volts.

Michael
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Old 03-25-2013, 08:22 PM
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OK, thanks. When I installed the starter I saw that the screws and the connectors were different size, so it was obvious which one went where.
Thanks,

Csaba
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