CMF Senior Member
Join Date: May 2016
Location: Near Chicago, IL
re: Changing DRL from headlamps to amber fog lights (Tur signal lights)
The issue you run into with DRL and Halogen headlights, the low beam is the DRL using PWM (pulse width modulation) or reduced voltage from the BCM (body control module). When the light sensor on the dash detects darkness, PWM ceases and the low beam gets full B+ voltage from the BCM.
I don't know for sure, but you might run into an amperage issue through the BCM if you connected your fog lights to the low beam. Your fog lights would have DRL PWM voltage until dark, then full brightness. IIRC, the LED strip around the fog light connects to its own power source and is triggered by the DRL. I don't know if the DRL signal is enough to trip the relay.
Check for fog light DRL posts. I plan to add LED fog light housings in the future. My car came with the fog lights.
2015 Malibu LTZ Silver Ice Metallic
"Make yourself necessary to somebody." Ralph Waldo Emerson
Last edited by SCompRacer; 06-30-2016 at 02:15 PM.
Reason: add image