What is third wire on kill switch

[DavyStokes]

I serviced my McCulloch GBV 345 and a third cable to the kill switch came loose and I have no idea where it goes or what it does. It has a large flat eye terminal and judging by the length of the wire it maybe connects to something in the top handle - but there are no metal parts in the top handle. The photo shows a possible connection but what can it do if attached to a plastic boss. Any ideas anyone?

 

[wwillson]

It can only connect to something within the distance of the reach. Could we have a picture showing more of the handle and the other half of the handle?

 

[Oildudeny]

If it has an eyelet did you find any loose screws? Is the switch and machine functioning without that wire connected? Its possible it's a switch used on different models and doesn't serve a function on your machine.

 

[Kira]

My idea (a guess) is that the switch was designed for tools with metal bodies and that the red wire in your photo is a ground.
They couldn't leave it unattached or it'd rattle.

 

[wings&wheels]

look closely at the ring terminal for evidence of it being used; notches from a star washer, etc. It may be just an extra terminal unused in your application as mentioned above. I was helping a friend w/ an old log splitter and it had a similar switch, but the third red lead went to the oil safety switch...lack of sufficient oil grounded the ignition, but you have a two stroke I believe.

 

[FowVay]

Most handheld equipment with that wire have a metal band that runs about 3 inches along the handle. My Husqvarna 125B blower has that also. I am not sure what it's for but it's not so uncommon. Maybe it's some sort of neutral or body ground.