M wiring Issue

Eppe · Aug 26, 2008

I followed Bob's diagrams #5 & #6 - now my M will fire with the ignition switch in the off position and will kill the tractor when the ignition is pulled out (on)also when the ignition is pulled out the resister gets very hot. I put a diode and resister in the sytem just as the diagrams stated. Help Anyone????

Thanks -
Bobs Diagrams

Janicholson · Aug 26, 2008

If the tractor has a magneto, there should be no wires going to any part of the ignition. That may be it in a nut shell. Put a switch connected to the #1 terminal and the load side of the amp meter (not the side connected to the positive battery cable at the starter) This new switch starts the alternator, and is on when running the tractor, and off when the tractor is off, but is not the ignition switch it is very seperate. Tell us more if this does not fix it. JimN

JOSSETTE · Aug 26, 2008

did you switch the wires at the ammeter??

Eppe · Aug 26, 2008

Will switching the wires at the amp meter really make a difference???

Bob M · Aug 26, 2008

No. Swapping the wires at the ammeter only reverses the ammeter hand operation. It will change nothing else.

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To your other problem:

1 - Does your tractor have a magneto? If so the diagram in Josette's post is the wrong one for your tractor.

2 - The ballast resistor will get very hot in operation - hot enough to smoke if there's any paint or oil on it. This is completely normal.

JOSSETTE · Aug 26, 2008

does switching from positive ground to negitive ground make a difference??

Eppe · Aug 26, 2008

I believe it does have a magneto... How do I tell for sure? And if I do have a magneto, what is the proper wiring diagram??

THANKS MUCH FOR ALL OF YOUR PROMPT RESPONSES!

Janicholson · Aug 26, 2008

A magneto will have no round cylinder looking coil attached to it. It will have a spark wire wire coming out of the top facing rearward, going into the center of the cap with spark plug wires coming out. The diagram you need is #4 if it is a Mag (and I think it is) JimN
Bob Ms marvelous diagrams

Eppe · Aug 27, 2008

Ok - yes, I believe it does have a mag, but diagram #4 shows a positive ground set up with a generator, I have an alternator and a 12 volt set up.... So - now where do I go?

When I got the M the previous owner really had the wiring messed up, so I had to start from scratch... It originally had a 6 volt battery on it with a 12 volt alt and about 5 different switches built in.

Rich ORourke · Aug 27, 2008

Do you mean like a toggleon and off switch? thanks, rich

Janicholson · Aug 27, 2008

The mag is, as I stated, not connected to anything but the mag Kill switch in the electrical box. (push pull, on off switch)
That switch is a single terminal switch that grounds the wire attached to it when the switch is pushed in, and opens (allowing mag operation) when pulled out.
No modifications are made to any part of the ignition Mag or grounding switch or the single wire running to it.

Assuming a three wire SI10 GM delco alternator.

The alternator should be connected as follows:
a #10ga wire connects to the big "bolt on" terminal on the alternator. From there it is connected to the amp gauge, on the load side of the gauge (the side not attached to the Battery + side through the Starter Switch) Using a Fuse link saves burnt parts and fires. NAPA has them, (crimp on, not solder) JimN

Janicholson · Aug 27, 2008

See answer above in this post. JimN

Anonymous-0 · Aug 29, 2008

I have the M at my house now and still have some wireing issues need help. Have Mag circut all by itself now with a push pull switch but its backwards leave switch pushed in and it runs pull it out and it dies. Ihave reversed wires and tried differant switch and still does same thing ? Light circut is all well & good ! Alt.I Have heavy wire running to load side of amp gauge what do I do with two little wires in plug in.?

Janicholson · Aug 31, 2008

They are shown on the diagram (prior post) as 1 and 2 on the alternator. #2 goes to the big post on the alt. #1 goes to either a oilpressure activated closed on pressure switch, or a seperate switch that can be turned on to make it charge, and turned off when shutting down.
The switch you have for the Mag is actually for a distributor type ignition. It is wired in the only way it can be, but it will work backwards. The correct switch will have only one terminal, and the switch body is grounded. It is ground when pushed in. The one you have is connected when out, and one side of it is now connected to ground, the other to the mag grounding terminal. Thus off is when out. JimN

Anonymous-0 · Sep 1, 2008

Thanks I couldn't quiet figure out those little wires on that picture but your way worked . I also handled my switch problem also . We had sold this tractor to one of our neighbors and thought the two switches one which had to be out to let M charge and other one which had to be in for Mag might be confuseing all the time thinking about which one was which . So I put two toggle switches there so I could turn them around or what ever to make them both up when running and both down when shut off. Thanks everybody for all your Help Eppe Dad

M wiring Issue

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