12 VOLT CONVERSION QUESTION

Ron Tron

Member
I'm doing a 12 volt conversion on a 9N and I'm putting in the electronic (pertronix) ignition system. The kit comes with a 12 volt coil. Do I still need the added 4 ohm resistor with the new 12 volt coil? I don't get the need for a resistor if you change the 6 volt coil to a 12 volt coil. Can someone explain?
 
Also can someone please tell me what amount of cranking amps battery is best suited for this conversion?
 
(quoted from post at 06:52:41 06/02/16) I'm doing a 12 volt conversion on a 9N and I'm putting in the electronic (pertronix) ignition system. The kit comes with a 12 volt coil. Do I still need the added 4 ohm resistor with the new 12 volt coil? I don't get the need for a resistor if you change the 6 volt coil to a 12 volt coil. Can someone explain?

No you don't need the resistor. The resistor is provided for using with a 6 volt coil. The primary wire to the coil still needs to run through the OEM dash mounted resistor. The other wire is supposed to run back to the battery side of the resistor.

I use 550 amp batteries in both of my 8n's converted to 12 V. Plenty of cranking amps for the low compression engine in the N.

Rick
 
(quoted from post at 10:31:49 06/02/16)
can I trouble you Rick to make a drawing and post it.........I would so much appreciate it........
he drawing is on the Pertronix instruction sheet that came with the unit.
 
http://www.aiproducts.com/techbulletin/OM1247-12VNEG.pdf I posted these2 links to thedrawings on your other post also http://forums.yesterdaystractors.com/viewtopic.php?t=1272953
 
(quoted from post at 07:31:49 06/02/16)
can I trouble you Rick to make a drawing and post it.........I would so much appreciate it........

Boy, that's asking a lot from a guy who can't draw.

On the one I just installed it had 2 wires. One, short black one goes under the brass contact for the coil contact and the other red one I extended and wired it in on the battery side of the Ford OEM dash mounted resistor. From the drivers seat to the terminal on the left side of the tractor.

Rick
 
OKY DOKY...........lets get a little clearer here. I bought to conversion kit from YT. So I have the single post Alternator and the 12 volt box coil. My question now is .......I also received the wiring harness that goes with it.
There is a red and violent longer wire unit bonded together a shorter red and white wire unit bonded together and two short red wires with connectors only on one side.

looking at the 12 volt conversion chart I don't see any violet wire and can't figure out how to make this harness unit work.

any suggestions?
 
(quoted from post at 11:00:58 06/03/16) OKY DOKY...........lets get a little clearer here. I bought to conversion kit from YT. So I have the single post Alternator and the 12 volt box coil. My question now is .......I also received the wiring harness that goes with it.
There is a red and violent longer wire unit bonded together a shorter red and white wire unit bonded together and two short red wires with connectors only on one side.

looking at the 12 volt conversion chart I don't see any violet wire and can't figure out how to make this harness unit work.

any suggestions?
ag on YT for instructions for stuff they sell & be careful with the violent wires!
 
LOL................that was my computer thinking it was correcting the spelling must be............I know how to spell violet........see if it does it again.
 
(quoted from post at 08:00:58 06/03/16) OKY DOKY...........lets get a little clearer here. I bought to conversion kit from YT. So I have the single post Alternator and the 12 volt box coil. My question now is .......I also received the wiring harness that goes with it.
There is a red and violent longer wire unit bonded together a shorter red and white wire unit bonded together and two short red wires with connectors only on one side.

looking at the 12 volt conversion chart I don't see any violet wire and can't figure out how to make this harness unit work.

any suggestions?

OK, electricity doesn't flow any better out of a certain color wire. Only size matters in how many amps it can safely carry. You can build a wiring harness out of all one color as long as the wires go to and from the corresponding terminals.

So from the alternator to the Amp meter, 10 ga wire (heavy wire but much smaller than a battery cable). Wire from the coil side of the resistor to the coil (should already be there so no need to run a new one unless it's in poor condition). Red wire from the ignition back to the battery side of the resistor. Those are the 3 wires you need for the engine to run and the alternator to charge. The wires from the black puck in the ignition is a short black with a connector on it. That goes under the brass coil contact/screw inside the distributer. The other longer wire should be red and about 10-12 inches long with a striped end. That's the one you run back to either the battery side of the resistor or to the ignition switch. The color of wire you use doesn't matter. It can be pink with purple dot is you can find some.

If I can figure out how to post a picture from my IPhone I will try to get one later today.

Rick
 

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