Yanmar 4JH2E - Where do these wires attach

[smokey73]

While searching around for my tach sensor I found this connection with 2 wires not connected to anything.
They are located on the Stbd aft side of the engine. I found my tach sensor on the Port aft side sensing off the flywheel.
The only sensor or alarm that I note on the wiring diagram (pg 9-4 of 4JH2E) for my Type C panel with 2 wires coming from it is the tach sensor. All other sensors have only one wire and are grounded to the block by the sensor. My tach works so it is not the tach sensor and I don't find that wire code on the drawing? Any ideas?

 

[kloudie1]

Not sure, but probably for a water detector in a sail drive installation.. on my old 3gmf, the unused wires are white/red and black. If you don't have a saildrive, they'd be unused.

 

[smokey73]

Interesting, but shouldn't it show on the Yanmar workshop manual (as 'optional') like the air heater (which is shown as optional on the wiring diagram)?

 

[kloudie1]

I found this for the "B" panel 4JH2E.. Note that the "sail drive" sensor at the top of the page, center , goes to the "water proof" warning lamp on bottom right. Those wires are yellow/green and black.

 

[smokey73]

@kloudie1 Thanks, I appreciate the info. Just an extra wire.