Converted 400 to 12v , now tractor won't shut off with key

bugspot · Feb 22, 2011

I followed a good diagram for a 6v to 12v diagram.
Alt. still not charging. After finding aditional wires off ign.side of switch,I put them back on and now have 14 some volts at batt. Now the tractor won't shut off with key. In the diagram was a batt.warning light. I don't have one, and didn't think I needed it. ? thanks

Anonymous-0 · Feb 22, 2011

You need a diode in the circuit...hot rodders found that out years ago. Current feeds back through the ignition circuit; a diode acts as a "one-way valve' and stops the backfeeding.

Ask about Bob's diagrams for the conversion for the diode part number and where to place it in the circuit.

bugspot · Feb 22, 2011

Thanks that's what I wanted to hear. Somethin easy....Bugspot

Brad Gyde · Feb 22, 2011

Yep.. If you used the 3 wire Delco you need a diode or a small "lamp" to prevent the backfeeding, as was previously stated.

I myself like the "light" as it kinda tells me if I'm charging or not (as not all things I have have a volt meter or ammeter).

My local NAPA gets me one that is "sealed" and slips in a 1/2" hole.. and I think they cost about $7.00.. Can be had in a variety of colors.. Blue, Green, Orange, and Red that I know of for sure. I usually keep one around (as I've found a few other good uses for em too), which reminds me, all I have left is a green one.

Oh.. and if you use the light, you connect one "post" to the ignition switch, and the other post to the alternator (I believe the #1 post?? on the Alt.. been a while since I done it last).. I screwed that up my first time.

Also as mentioned, Bob once posted for me the wiring diagram.. Very simple and easy to understand.. Makes it almost foolproof to swap stuff over from gen to alt.

Brad

Bob · Feb 23, 2011

Rich'sToys · Feb 23, 2011

That wire can also be connected to the + side of the coil if you don't want to run it all the way back to the switch. That's how I did it on my MM's.

The diode I used was from Radio Shack, # 276-1661. A package of 4 was only a couple dollars.

bugspot · Feb 23, 2011

Yeh, just might do that. Thanks freind ...Tim

bugspot · Feb 23, 2011

Bob, I know why they refer you. That picture is great. I'm sure we will write again ...Thanks Freind ...Tim

Converted 400 to 12v , now tractor won't shut off with key

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