Rewiring Farmall Super C

Anonymous-0 · Feb 9, 2009

I am in the process of installing new wiring in my 1953 Farmall Super C. Where does the headlights get grounded in the box? The wiring has a 1/2 inch connector for the ground. I have the "pancake style" lights on the tractor so there is a ground wire that runs to the lights.

ScottyHOMeY · Feb 9, 2009

If I'm understanding you, your lights aren't made to gorund through their bodies and there are two wires to each light, a hot and a ground. If that's the case you can ground about anywhere inside the steering support. I'd tie the ends of my ground wires together on a 3/8" eyelet and ground it to either one of the bolts holding the shaft support to the panel box or, better yet if you have enough wire, to one of the bolts holding the panel box to the chassis. Clean everything up so you get a good connection and your lock washer should bite into that eyelet to give you a good connection.

Dave H (MI) · Feb 9, 2009

Scotty, I may be wrong and I am sure somebody will tear me a new one if so, but I never heard of such a light. These are metal lights and ground is generally to the body of the light, therefore, the body would ground thru a good clean connection to the tractor body. I am having a hard time conceiving of a situation where they would isolate the circuit from the light housing so you could put a jumper to the tractor body. Am I wrong? Doesn't make sense.

Anonymous-0 · Feb 9, 2009

Thank you for the suggestion. There are two wires to each light. I have a ready-made harness and the ground wires are already tied together with an eyelet.

ScottyHOMeY · Feb 9, 2009

If I read his description right, Dave, he's got some kind of sealed beam where the bulb is all glass except for the contacts, so you need a separate contact for the ground side, kind of like an automotive headlamp.

Most tractor lights I know of ground through the mounting stud like you suggest. And there may well be a grounding point somewhere in his housing that needs only a short run of wire inside the housing to the contact on the bulb. I just don't know.

Mark Peters · Feb 9, 2009

Scotty,I was thinking he must have some sort of automotive type bulb too.The original sealed beam bulbs and also the ones from OEM (new repro`s)have a thin ground strap that gets pushed thru the hole in the back of the light housing and gets grounded to the back of the housing with a small round head screw.I don`t know why, but I know I`ve seen some pancake lights off 400`s and 450`s that had 2 screws in the back of the housing,though.

TheDurk · Feb 9, 2009

My 1966 140 was born with glass sealed beams and the ground wires are separate. I don't remember how it was grounded originally because I rewired the whole thing about thirty years ago. I have both lamps tied to an eyelet on the generator bracket bolt. That has worked fine for 30 years. Is your eyelet all the way back at the switch box?

ScottyHOMeY · Feb 9, 2009

We're havin' the same idea on where/how to ground, but the lights on the SuperC are back by the steering wheel. And that switch box is just riddled with 3/8" bolts that would make a good ground.

Dave H (MI) · Feb 9, 2009

Yeah, the flat style light. I have never actually looked at one of those. Our MTA is supposed to have them, I think, but instead someone stuck the cone shaped ones on it. Never saw a reason to change them out.

Rewiring Farmall Super C

Anonymous-0

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ScottyHOMeY

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Dave H (MI)

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Anonymous-0

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ScottyHOMeY

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Mark Peters

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TheDurk

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ScottyHOMeY

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Dave H (MI)

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