I just check to see if I can add an indicator light for lockup on my Previa, I connected a led diode and series 1k resistor to +12V so it will go out when lockup is enguaged. Supprisingly, the 12Ma it takes cause the RPM to drop at idle! no way 12mA will pull in a solendiod, it must have some electronics in the gearbox.
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