I was wondering if a simple relay circuit would allow for the dimming of the monitor. I use 2 settings in my xenarc. Full bright in the daytime and 0 bright at night. I wanted to tap the inverter wire and put a relay on it so when the relay is off it gets full conection which would get full brightness (or whatever the xenarc is set to) and once the headlights are on the relay will divert the circuit to a resistor to dim the backlight. Does this seem right? Any tips or suggestions?
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Auto Dim Xenarc/Liliput with illumination wire from radio harness?