12 volt conversion

rmor

New User
I recently installed a 12 volt conversion kit (purchased from Yesterday's Tractor Co.) with a one wire alternator. I followed the supplied wiring diagram and now it won't click, clack or even start. I have power to the alternator with the key off, as well as the starter relay (it dosn't click) and at the ignition, but no power at the starter button. I thought the starter relay could be bad , but am not sure how to check it. If anyone has a clue, I sure could use a little help.
 
rmor.........surprizingly enuff, starter relay (on top of starter motor) don't care positive (+) or negative (-) ground; don't care 6-volt or 12-volt. Just make certain the little middle terminal is facing the block where it is hard to gitt-too.

Would it surprize you to learn yer alternator should NOT have voltage with the key OFF???

I don't like 1-wire alternator conversions 'cuz they output about 17-volts to yer 12-volt battery and will cause the water to boil away and warp the battery plates. (mox-nix)

And finally, yer BIG thumb push button at the bottom of the tranny shifter GROUNDS the little middle terminal of the starter solenoid causing it to activate. Until you PRESS the BIG button, you will have battery volts at the terminal of the BIG push button.

Many clumsy footed tractor drivers KICK the starter solenoid wire as they swing their leg over the saddle and they will break the wire or short it out. While you didn't complain specifically, it is sumptin' to be aware of.

BTW, yer starter solenoid should only make a click-clack when you press the BIG starter button by the tranny shifter. Generally yer starter motor noise will drown out the little clicky-clack of the solenoid.......electrical Dell
 
8N or modified 9N or 2N?

Did you change the starter solenoid?

Are you using the tranny-top neutral-safety start switch?
 
Big terminal on the alt is hot from the battery all the time. The excite wire goes on & off with the switch. Charging circuit is not his problem, but the starting circuit is.
 
Where does the "excite wire" hook up on a one wire alternator?
I agree that the charging circuit is not stopping it from cranking.
 
"I have power... the starter relay (it dosn't click) and at the
ignition, but no power at the starter button."

Help me out. Where are you measuring power on the relay?
And where on the ignition exactly? Same with the starter button
and what type of button? The original one?

Assuming an 8N here, would be different on 9N/2N.
If you are using the original statrer button and the standard 12V
conversion, you should have 12V to the battery side of the relay
(both physically and electrically battery side) and you should
read battery voltage on the small relay terminal that connects
to the original push button/neutral safety switch by the shifter.

That is, until you push the starter button, then the small terminal
should be grounded. That what the starter button does.
Since it provides ground, that relay has to be the right one and
has to be hooked up correctly. As Dell said, small terminal in
toward the engine block, not pointed out.

9N/2N wouldn't originally have a solenoid/relay.
If you have one of those models, please provide more info.

Regardless of model, it should roll over even with the key off.
Once we get it to roll, we can work on ignition firing and charging.
 
help us help you and answer the important questions asked.

like oem start relay?

oem tranny mounted start switch.

for sure an 8n and not a 9n / 2n setup ?

replaced start relay or not?

still in same orientation with small post facing inward toward block?
 
Just installed new starter solenoid on my 8N with no results. Put in on with small terminal facing outward. Didn't know it made a difference. Why would it? Will turn it around tomorrow and try again. Thanks for the suggestions.
 
That relay doesn't run on magic, it runs on electrons.. Changing the orientation changes which big terminal the bat is on, since the coil is between bat and lil terminal, if you install it backwards, coil never gets power !!
 
"Why would it?"

Because your original thumb switch applies ground to the
small post, not power like some other solenoids.
The activating coil is connected between that small post and power
at the large post normally connected to the battery. You now have
that battery post connected to the starter instead of to power.
 
Dell If you have a one wire alternator putting out 17 volts it's regulator is shot. It should be putting out 14-14.5 volts.
 

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