“Does this auto dim/brighten on light levels or can I control the brightness? The reason I ask is my trucks auto dim feature is not working right.”
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The radio offers its own dimmer on/off on it from its settings. This has nothing to do with your vehicle. The only reason for the dimmer from the vehicle side is if you want the radio to dim when you turn on the head lights then that connection applies from the vehicle. The wire for that is called the illumination wire.
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