dash indicator light

INCase · Dec 13, 2013

question. Put a napa dash indicator light on my FIL's 9N when I switched to 12V alternator. The light never goes out unless I do a quick jump across the wires and it charges. Alternator is a Delco 10SI 3 wire.

I was told the napa light doesn't have enough resistance to activate the alternator.

On my Case 800 i used a Case dash light which takes regular small auto bulbs and it works great.

I know i can drop the light and just put in a diode but want the light so he knows if its charging or not.

Does anyone have a source or part number for an indicator light they've used?

Thanks.

Bob · Dec 13, 2013

Try connecting a 10 Ohm 10 Watt ceramic resistor ACROSS the lamp.

John T · Dec 13, 2013

This is along the lines as Bob noted, if its an LED light versus a small incandescent indicator bulb, IT MAY HAVE TOO MUCH RESISTANCE to allow sufficient current flow to externally excite the alternator. While it doesn't take a lot of current to excite the alternator, those LED's are of such high resistance (thus low current draw) its like you didn't hook up anything.

Instead of an LED Id just use a small indicator automotive bulb.

John T

teddy52food · Dec 13, 2013

LITTLE should be much.

INCase · Dec 13, 2013

Thanks. John,
That is whay i'm looking (small indicator light socket) for but can't seem to find anything by googling.

That's what i have on the Case and it works but the dash came with the lights (factory) so I can not use that source.

Bob · Dec 13, 2013

52... THANKS for pointy out my error! I REALLY blew that one! It's been corrected1!

John T · Dec 13, 2013

Bob, and that will get worse as you grow older lol My fingers get ahead of my brain sometimes

John T

Mike in Mn. · Dec 13, 2013

Hook a a small auto bulb(I can't remember the #) in series with that small dash indicator bulb and hide it where it can't be seen, that little light is too small to do the job.

JMOR · Dec 13, 2013

(quoted from post at 23:12:21 12/13/13) Hook a a small auto bulb(I can't remember the #) in series with that small dash indicator bulb and hide it where it can't be seen, that little light is too small to do the job.

Parallel

Tim Daley(MI) · Dec 14, 2013

Early 9Ns had an 'ignition on' dash lamp that stayed on whenever the tractor was running. Usually when a 12V conversion is done, the light gets by-passed.

Tim 'PloughNman' Daley(MI)

36 Coupe · Dec 14, 2013

I have plenty of pilot lite sockets in the shop but there is little business these days so I close the shop in winter.

dash indicator light

INCase

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Bob

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John T

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teddy52food

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INCase

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Bob

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John T

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Mike in Mn.

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JMOR

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Tim Daley(MI)

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36 Coupe

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