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1970 Electric Need Help.


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#1 Falcon1148 OFFLINE  

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Posted June 29, 2014 - 10:29 PM

Hello Theres  a yellow wire on my 1970 Gilson, 14 horsepower going from the Ignition switch down to the points,  And im trying to figure out what this wire does , Im not getting any voltage.   thanks if you can help.


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#2 JDBrian OFFLINE  

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Posted June 30, 2014 - 04:31 AM

Welcome to GTTalk! I'm not familiar with that tractor. It almost sounds like it could be a engine cutoff wire. It would ground out the points to shut off the engine. You should be able to disconnect the battery, take an ohmmeter and see how it is connected to the other switch terminals when the ignition switch is in run, start and off.  Maybe if you could give us the model no. of the tractor or some pictures someone would have experience with that tractor and be able to give detailed info. 


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#3 Alc ONLINE  

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Posted June 30, 2014 - 05:23 AM

Welcome to GTTalk !!   Off hand I can't think of a reason but maybe Brain already answered it for you .


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#4 trowel OFFLINE  

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Posted June 30, 2014 - 05:30 AM

Sounds like the engine cut off switch, interesting it would be routed to the points instead of the coil.



#5 JDBrian OFFLINE  

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Posted June 30, 2014 - 07:59 AM

Sounds like the engine cut off switch, interesting it would be routed to the points instead of the coil.

It may have been modified at some point. The wiring on older tractors often seems to be far from factory spec. At least the ones  I buy anyway.


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#6 crittersf1 OFFLINE  

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Posted June 30, 2014 - 08:36 AM

:welcometogttalk: :wewantpics:



#7 HDWildBill OFFLINE  

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Posted June 30, 2014 - 09:29 AM

Have you checked the manuals section for your tractor?  That may give you some insight on the wire especially if the manual has an original wire diagram.  Like stated above if you could give model #'s and pictures it might help us help you.  Welcome to GTtalk and let us know how it all works out.



#8 Sprint 6 OFFLINE  

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Posted June 30, 2014 - 10:56 AM

I have a 74 Gilson built M/W 16.  The wire attached to the point cover from the tractor is the grounding wire to kill the engine, there should be no voltage on that wire.  It should be open with the key on and have continuity to chassis ground with the key off.  Your engine has magneto ignition, which is self contained and needs grounded to stop.  The other black wire goes to the coil under the flywheel housing.


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#9 Pdp2589 OFFLINE  

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Posted March 28, 2015 - 11:22 PM

If stock, the yellow wire is for the magneto. It attaches to a black wire that goes to magneto above the flywheel to kill the engine when key switch is in off position.

#10 Kaj Jensen OFFLINE  

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Posted January 28, 2016 - 09:44 PM

I believe the wire  kills the spark when you turn off the key






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