I'm wondering why you need to trail a wire down the A pillar to the blue and white wire behind the light switch when my interior light already has an auto dimming function as standard?
the dimmer wire is not to auto dim the light. it is to power the ambient lighting. if conected to the interior light dimmer when you dim the lights it will dim the ambient lighting aswell. it also means the ambient light only comes on when you have your sidelights on


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