12 V Coversion Kit

Lets start at the starter relay.

One large post gets..... ..
the battery cable from the battery
a 10ga wire to the + post on the alternator
(you can wire a amp gauge in this wire if you want)
a wire to the terminal block.

The other large post gets..... a battery cable to the starter.

the small post gets..... a wire to the starter button on the trans.
If it will not crank you have the 2 large post on the relay hooked backwards. just reverse them.

Now for the coil..... ....
Hook a wire from the terminal block (same post as wire from relay) to the battery post on key.

Hook a wire from the run (ing) post on key to the other side of terminal block.
Hook a wire from this same post on terminal block to the coil resistor and them from resistor to coil.

Follow the link below. It is for a Ford 600 but is the same. Only difference is this diagram has a coil with a internal resistor and your coil has a external resistor.

If you notice it will not charge until you rev the motor way up you may want to wire it like picture 8 of 9 since you already have a car key switch.

• wiring diagram 9 of 9

The Hawk,

Most alternators use Negative ground but since Im not sure of what you have I will use generic terminology.

The SUPPLY side of the ammeter usually has but ONE WIRE and thats the main hot battery voltage feed which often wires to the starter solenoids input/supply (NOT side to starter) post where the big battery cable is attached. It could be wired direct to the hot ungrounded battery post, but its usually fed off the starter solenoids hot (NOT to starter) terminal.

The ammeters other LOAD side (often 2 wires or more) is what supplies voltage to switches n lights n ignition PLUS wires to the big main BAT terminal on the Alternator. BOTH sides of the ammeter ALWAYS read hot battery voltage, therefore, any wires off either terminal, including the one to BAT on the alternator, ALWAYS HAVE HOT BATTERY VOLTAGE.

If the ammeter were wired backards it would read charge for discharge and discharge for charge. If its correct with the tractor NOT running if you switch on lights or ignition it should swing to - discharge.

Clear as mud?????

John T, retired electrical engineer