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Determine old resistor from old vehicle
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jabalv:
Hi.

I have a schema for tractor where there is glower input inlet. There is 12V+12V 24V and R1 to transfer 12V for that glower.
But that R1 is in terrible condition and I am trying to understand where can I get such thing and how big value it is.
See attached images.

Can you please help?



ArthurDent:
From the photo it doesn't look like the resistor's zig-zaggy element is broken so you may still be able to read the resistance of the resistor with a multimeter. Ohmite vitreous power resistors may have a close replacement.  Other than that a repair shop or the tractor maker would be the place to go.
cvanc:

--- Quote from: ArthurDent on February 07, 2019, 02:47:55 pm ---From the photo it doesn't look like the resistor's zig-zaggy element is broken so you may still be able to read the resistance of the resistor with a multimeter. Ohmite vitreous power resistors may have a close replacement.  Other than that a repair shop or the tractor maker would be the place to go.

--- End quote ---

Yup, exactly.  It looks like you might still be able to measure the value of your part, so head in that direction and let us know what you find.

And post a picture of the tractor!  Old tractors are cool.  Good luck with your restoration.
soldar:
If the glow plug is 12 volt and the resistor is to drop 12 V from 24 to 12, then the resistor is of the same resistance as the glow plug.
mikerj:

--- Quote from: soldar on February 07, 2019, 03:54:18 pm ---If the glow plug is 12 volt and the resistor is to drop 12 V from 24 to 12, then the resistor is of the same resistance as the glow plug.

--- End quote ---

Noting that the resistance of the glow plug will likely increase when running at it's intended temperature compared to cold.
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