RE: IML: resistors and voltage

[<mopar413@xxxxxxxxxxx>]

---- "Michael O. Mann" <mann340s@xxxxxxxxxxxxx> wrote: 
> Dave,
> The ballast risistor provide 12 volts on start up and then supplies around 6 volts when the car is running.   One side should have about 6 volts .  
> Thanks.  That makes sense to me, but it was a piece I hadn't picked up
> before.
> 
> Michael
> 
> The ballast resistor, varies in resistance,do to heat. At low speeds, the
> resistor is hotter, due to longer periods of point closing (contact) the
> resistance is greater, resulting in lower voltage across the points.
> As engine speed increases, the resistor cools, and voltage increases across
> the points, but the contact time is reduced.It would be quite normal to see
> 6-8volts at idle speeds, and 10-12 volts, at high speeds.Ya'll have a nice
> day, Dave.



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