Ok, I have studied the service manual (which includes the schematics Klaus posted) and I still don't know where the power to switch the perimeter light comes from.
I can't tie directly into either the B/U or the DRL circuits because they come one when in reverse and drive, respectfully. I am pretty sure this is handled by the BCM but I can't find anything that mentions how it turns the perimeter lighting on when it senses the sunlight is low.
Tech guys, any ideas?
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