I’ve noticed in several new vehicles the following scenario:
Vehicle is traveling with LED day-time running lights around/adjacent to the headlights
Vehicle activates turn signal indicator
Vehicle shuts off LED running light while turn signal indicator is flashing
LED running lights turn on once the turn signal indicator stops
Here are the cars I’ve seen seen this happen:
Jeep Grand Cherokee
Why don’t the LED running lights stay on while the turn signal is on?
There are federal standards on vehicle lighting so it is probable that the extra bright LED would cause the non LED turn signal light to fail to meet the standard.
Many current year models also use an LED for turn signal – my Cadillac CT6 has LED turn signals.
So- manufacturers just needed more time to transition to a complete LED lighting system.
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