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Cub headlight switch ?

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Andy Engel

10-29-2005 14:30:54




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Hi folks. I've got a '52 Cub, and today I was installing a new wiring harness. That's going well enough, but I found another problem. On the back of the headlight switch, there are 5 terminals. One comes from the battery, one goes to the headlights, one goes to the backlight, and one goes to the tail lights.

It's the fifth terminal that puzzles me. What looks to be some kind of resistor jumps between that terminal and the headlight terminal. It's a coil of wire, and it once was insulated. Half the insulation is gone, and it's broken. What is this thing, and is there a quick fix for it?

Thanks much,

Andy

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Janicholson

10-30-2005 09:38:40




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 Re: Cub headlight switch ? in reply to Andy Engel, 10-29-2005 14:30:54  
To replace the resistor with a substitute' use a wire wound ceramic power resistor of between 2 ohms, and 4 ohms. It should handle 50 watts dissipation. This means it looks like a little finger sized cigar with a terminal on each end. A 2 ohm will be brighter than a 4 ohm. If it is not 50 watt, it will glow and self destruct. (assuming three lights draw 8 amps on high, with the resistor in the circuit they should draw about 5-6 amps. Watts = amps times volts, so 6X6=36 watts. 50>36 and it won't burn up. It will get hot, it is supposed to.
JimN

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Andy Engel

10-30-2005 17:50:54




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 Re: Cub headlight switch ? in reply to Janicholson, 10-30-2005 09:38:40  
Great info. Thank you.

Andy



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George Wallace

10-29-2005 21:26:35




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 Re: Cub headlight switch ? in reply to Andy Engel, 10-29-2005 14:30:54  
If you have a cutout switch instead of a voltage regulator that resistor does more than dim the lights. If you look at your amp meter while the tractor is running you will see that the tractor is charging at a high rate. If you plow all day like this, you will over charge the battery. To cure this, you use the light switch to regulate the current going to the battery. On my cub, the amp meter is at zero with the lights on bright. The dim setting allows some charging but will not over charge the battery. Now, since I do not have any experience with a cub with a voltage regulator, I do not know if this still holds true. See the attached link for a pretty good cub wiring diagram.

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Andy Engel

10-30-2005 03:02:27




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 Re: Cub headlight switch ? in reply to George Wallace, 10-29-2005 21:26:35  
George, thank you. Mine is definitely the newer version, although not by much judging by the serial number. Oddly, mine is negative ground though.

Anyone have an idea where I can buy one of those resistors? I didn't find one on this site.

Thanks again for the help.

Andy



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George Wallace

10-29-2005 21:29:08




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 Re: Cub headlight switch ? in reply to George Wallace, 10-29-2005 21:26:35  
Since the link did not show up, try here
Link



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Roger46

10-29-2005 17:49:58




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 Re: Cub headlight switch ? in reply to Andy Engel, 10-29-2005 14:30:54  
Andy, That is a resistor. It is for dim lights as it puts this resistor in the circuit when you turn the switch to dim. Without it you will not have dim lights. Roger



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Andy Engel

10-29-2005 19:08:38




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 Re: Cub headlight switch ? in reply to Roger46, 10-29-2005 17:49:58  
Thanks. Sounds like I can reassemble everything, and add the resistor when I get one?

Andy



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