The Ford Barn

Piet · 05-06-2025, 04:00 PM

Hi,

which wire goes where on the generator?
They had built a 12v alternator on it, I built this generator back on but I have no idea how to connect the wires.

1955cj5 · 05-06-2025, 04:11 PM

They both go to the cut-out output stud.

nkaminar · 05-06-2025, 05:03 PM

It looks like you have the cutout on in the correct orientation. Good. If it is mechanical it will not care whether the car is negative or positive ground. If it has the diode in it then it will not work if it is the wrong polarity. Plus, whether mechanical or electronic, it will care if it is not the right voltage.

Badpuppy · 05-07-2025, 07:28 AM

To clarify, an original cutout relay coil will burn out at 12 volts. Unless converting back to 6 volts you will need a diode cutout of the correct polarity.

ndnchf · 05-07-2025, 12:36 PM

The cutout is mounted correctly for that '29 style generator. I concur with 1955CJ5 on the wiring. BTW, that is a cheap repro cutout. Good on ya for returning to a generator.

nkaminar · 05-07-2025, 05:05 PM

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If the ammeter goes very negative when you hook up the wires, then the polarity of the cutout (diode) is wrong. If this happens, remove the wire quickly so that the generator is not damaged and the battery is not discharged.

05-06-2025, 05:03 PM	#3
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 5,863	Re: wiring generator It looks like you have the cutout on in the correct orientation. Good. If it is mechanical it will not care whether the car is negative or positive ground. If it has the diode in it then it will not work if it is the wrong polarity. Plus, whether mechanical or electronic, it will care if it is not the right voltage. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. Last edited by nkaminar; 05-07-2025 at 11:09 AM.

05-07-2025, 07:28 AM	#4
Badpuppy Senior Member Join Date: Dec 2017 Location: Guthrie, OK Posts: 1,247	Re: wiring generator To clarify, an original cutout relay coil will burn out at 12 volts. Unless converting back to 6 volts you will need a diode cutout of the correct polarity.

05-07-2025, 12:36 PM	#5
ndnchf Senior Member Join Date: May 2012 Location: Fredericksburg, Virginia Posts: 1,088	Re: wiring generator The cutout is mounted correctly for that '29 style generator. I concur with 1955CJ5 on the wiring. BTW, that is a cheap repro cutout. Good on ya for returning to a generator.

05-07-2025, 05:05 PM	#6
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 5,863	Re: wiring generator Sponsored Links (Register now to hide all advertisements) If the ammeter goes very negative when you hook up the wires, then the polarity of the cutout (diode) is wrong. If this happens, remove the wire quickly so that the generator is not damaged and the battery is not discharged. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.