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Super m wiring - won't shut off

B

Brady Miller

Member
I have it wired correctly, toggle switch for shut off. Switch does not effect start or shut off. Must remove battery cable to kill. Alternator setup 12v. Used a diagram from a feller on this site. I will try good hd switch in the morning.
 
you need a diode in the wire from the switch to the alternator so current used to excite the alternator can not feed back to the ignition system.
 
In the wire from the coil input or ignition switches IGN terminal (supplies hot voltage to coil when ON) that goes to the small 1R alternators excitation terminal, do as posted below place a diode or else I prefer a 10 ohm 5 watt resistor for some degree of current limiting or else a small 12 volt incandescent indicator lamp.

The alternator can back feed the coil to keep it running even with ign OFF so the diode or resistor or lamp prevents that

OR ELSE SHES WIRED WRONG???

John T
 
Pull the plug out of the alternator when you try to shut it off. If it stops, then feedback is your problem.
 
I always use a cheap dome light in place of the diode. You can't have an LED - has to be good old fashioned filament. I just mount it under the gas tank - the light goes off when it starts charging. It is kind of convenient if you need to check the oil or something in the dark. Pull the kill switch, the light comes on, and you can check things before you start. It's a pretty good warning light too. If it comes on while you are running she ain't charging.
 
Radio shack, several years ago I got one from my local NAPA store that was really neat as it had wires and spade plugs on it
 
(quoted from post at 06:22:00 11/02/13) In the wire from the coil input or ignition switches IGN terminal (supplies hot voltage to coil when ON) that goes to the small 1R alternators excitation terminal, do as posted below place a diode or else I prefer a 10 ohm 5 watt resistor for some degree of current limiting or else a small 12 volt incandescent indicator lamp.

The alternator can back feed the coil to keep it running even with ign OFF so the diode or resistor or lamp prevents that

OR ELSE SHES WIRED WRONG???

John T
Click to expand...

I do not have a diode or light on my tractor and it turns off just fine through the switch with my conversion. I have a keyed battery disconnect as it will draw the battery down if I do not disconnect. I have been meaning to rewire everything and do it right.
I would check the wiring
http://www.radioshack.com/product/index.jsp?productId=2036268

I am pretty sure this is the diode you need 1N4001
 
I found that if using a resistor or diode that putting the device in the wire such that the leads are connected across the device, allows two thicknesses of wire to go past the device before connection. When soldered, it becomes a flattened "Z". The use of shrink tubing on this setup dramatically reduces the stress ion the leads. The resistor or lamp, is not polarity sensitive, but the diode must be installed in a way the still places the band (electrically) toward the alternator terminal. Jim
 
Any diode 1.5 amps@50 volts or greater will work. Radio Shack 276-1661 has good heavy leads.

A diode passes current in one direction, blocks it in opposite direction. The amp rating is the amount of amperage it will carry without breakdown. the voltage rating is the reverse voltage it will withstand without breakdown. Anything higher than above ratings gives added reserve.
 
Gents,

Thanks for the help. for the time being I unhooked to "A" and "B" terminals on the alternator. that helped a bunch. Thanks for the insight.
 
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