Re: Farmall B switch

Posted by ScottyHOMEy on July 25, 2007 at 17:40:04 from (70.105.246.111):

In Reply to: Farmall B switch posted by Dave H (MI) on July 25, 2007 at 16:11:07:

Dave, if the button switch has two contacts on the bottom, it is for a battery ignition.

On mag ignitions, the switch has a single pole and is used to ground out the mag and kill the engine when it is pushed down.

On a battery ignition, the closed (meaning pulled up) switch provides continuity of juice to the points and therefore the coil. With the two-pole swithch in the "up" position, juice will flow through the points to the condenser and coil to make her work like she ought to. Pushing the button down breaks that continuity and shuts her down.

In neither case, battery or mag ignition, does that switch have anything to do with whether or not the starter will turn the engine.

I'm pretty sure a new switch will fix what 's ailin' her, but if you want to test it, look around for a dangling wire that may just have a terminal and a screw attached to it. Use what you have, but a test wire with aggilator clips on both ends that you can use to re-establish the connection would be ideal. Hook that loose wire back up to the busted-off post as best you can, and see if she runs.

I'm thnkin' real strong that a new swith and maybe some wirin' is called for.

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