Electronics > Beginners
Determine old resistor from old vehicle
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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