Re: First Gen Gauge Light Dimmer
Yes, the OE switch has a large wattage rheostat to drop (waste in heat) the leftover current from the selected brightness.
I suspect the ISIS system has the dash lights, read resistance, as part of the emitter circuit of a transistor driver and you control the amount of conduction, read control the amount of current flow of the driver, to light the bulbs, hence, both ends of the light need to be connected to the control unit.
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