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post #1 of 8 Old 08-19-2012 Thread Starter
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Mystery wire!

I've noticed this blue wire wrapped in with the wiring harness that leads to the starter of my Yanmar 2GM20. One end female, the other male, neither connected to anything! Didn't think to check it for continuity (DUH!), but I'm assuming it's the same wire. It's approximately a foot long. There IS a spare connection on the wiring schematic, but this ain't it! I know it's not a lot to work with, but I would be interested in your thoughts?
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post #2 of 8 Old 08-19-2012
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Re: Mystery wire!

I do believe I have that same blue wire in the harness for my 3GM30F. Possibly the wiring harness is used in an application where that wire is needed?

Dale

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Re: Mystery wire!

Boat Wiring

Should be a sender wire if color is correct
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post #4 of 8 Old 08-20-2012 Thread Starter
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Re: Mystery wire!

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Originally Posted by ParadiseParrot View Post
Boat Wiring

Should be a sender wire if color is correct
No. My oil sender wire is yellow/white and temp sender is white/blue.
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Re: Mystery wire!

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Originally Posted by sailak View Post
I do believe I have that same blue wire in the harness for my 3GM30F. Possibly the wiring harness is used in an application where that wire is needed?
Is yours open on both ends?
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post #6 of 8 Old 08-20-2012
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I am not familiar with that harness per se..... But in the industry i work in, lots of harnesses have extra wires depending on the options the equipment may or may not have... Just my $0.02

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Re: Mystery wire!

I noticed the same for my Yanmar 2GM20 a few years back. After reading the service manual, I learned it's an unused wire for the 2GM20 and 3GM30. It makes note that the use for that blue wire would be for the 1GM10.
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post #8 of 8 Old 08-20-2012
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Re: Mystery wire!

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Originally Posted by L124C View Post
Is yours open on both ends?

Yes. Has a male connector on the end "toward" the engine.

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