Help identifying these electrical leads

[IH82BL8]

These images are looking aft along the port side of a Yanmar 2GMF on a 1984 Hunter 31. I discovered this while I was removing the old insulation from the engine compartment. Can anyone tell me what these leads should go to? I have a feeling it is a high temp alarm and one of the previous owners thought it was a nuisance.

 

[Charles Erwin]

Kloudie will know but these items are shown in the electrical diagram of your manual. As I recall the blue is not used except on the 1 GM. I don't remember the other unused items.

Charles

 

[Maine Sail]

Do you by any chance have a high output alternator installed? I really can't make out that plug nor the wire colors in the pic...

 

[Charles Erwin]

Did not see picture 2. My comments are good for picture 1 only. By the way the other one in picture 1 is an alarm feed (boot leak) if you have a sail drive - the colors are black and red/white.

Charles

 

[Stu Jackson]

What are they connected to at the engine side. We've found that pictures of wires hanging in space are pretty hard to diagnose on the internet without a wiring diagram or at least some kinda clue.

 

[PGIJon]

The attached document may help... I'm assuming that this is a Yanmar.... You may need to uncover the wire colors

 

[kloudie1]

Exactly, Charles.. The blue is only used on the 1GM so it is where it is supposed to be.. The two wire connector... if that white looking one is actually a white with red tracer, it is the water alarm for a saildrive, which I don't think was installed on the H-31.

The big one with a boot on it, I dunno about.. If I were to guess, I would say that it might be (have been?) the "E" lead or ground lead from the original alternator.

 

[Charles Erwin]

As to picture 2 the cover boot makes me think 12 DC hot. The boot is surely factory Yanmar. The only two- wire boot protected item I remember is at the starter solenoid 'B' as shown on PGI's diagram.

Charles