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As I posted in this thread, and testing the wires inside the headlight housing, I did not find that the light blue wire was energized with headlamps on. It was only energized while the headlamps were off and the shifter was not in park. If the DRL was energized with headlamps on my diode cluster would not be working as posted in that thread. My LEDs would be full brightness all the time, which they are not. My system depends on the DRL circuit being dead with headlights on.
If there is a mechanical or other type of switch inside the headlamp housing, it must be prior to the light blue wire inside that runs to the DRL.
If there is a mechanical or other type of switch inside the headlamp housing, it must be prior to the light blue wire inside that runs to the DRL.