Guest utsteve90 Posted November 2, 2014 Share Posted November 2, 2014 Greetings All - I have a question for those experienced in Fusion Energi headlight electrical theory. The halogen low beam headlamp also serves (in a dimmed state) as the user configurable (new for 2015) DRL - does the DRL circuit operate by pulse-width modulation (PWM) or simply a constant, but reduced current to the headlamp bulb socket? Thanks for any insight. Steve Quote Link to comment Share on other sites More sharing options...
puddlepirate1956 Posted April 27, 2021 Share Posted April 27, 2021 Good day to you I have a 2011 f150 that i found out after the fact that a tech could go into the computer and enable the DRL function for my headlights. With saying that they go to half brightness when I place the truck in drive. Then as light conditions change goes to full brightness as needed by the sensor. So my best answer for you would be a reduced current condition to the headlight. Hope that helps Bob Quote Link to comment Share on other sites More sharing options...
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