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How many ohms resistance in a 3-position light switch ???

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Alberta Mike

02-22-2003 16:12:49




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In the old-style 3-position light switch that many tractors had (40's and early 50's), there is a small resistor (wound around a mica plate) wired into the "full-in position" that controls generator output for a 3rd brush generator system. I'm trying to measure how many ohms of resistance the original resistor had. So far (with the pieces of wire that are left here that I have) I measure about 3 ohms. Is that close to what the original switches had?

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mj

02-22-2003 16:33:58




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 Re: How many ohms resistance in a 3-position light switch ??? in reply to Alberta Mike, 02-22-2003 16:12:49  
I have an original J.I. Case VA Series Service Manual (Rac258) and it does not specify the resistance for the light switch resistor. An ohm-meter was probably not as common when this book was written (1948?) as they are now.



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mj

02-23-2003 13:28:39




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 Re: Re: How many ohms resistance in a 3-position light switch ??? in reply to mj, 02-22-2003 16:33:58  
I checked 2 Case VAC 3-position light switches this morning and got 2.9/3.0 ohms.



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