Headlights swap

[14FiestaHotHatchEdition]

Sorry, but i cant find a post about my problem, let me know if it is here.

I have a 2014 hot hatch edition, which comes with standard lights with halogeen lights and black inner case. I wanted to upgrade them to the ones with led DRL lights and projector lights. So i went to the local junk yard and bought a set. It was really plug and play because it has the same connector. BUT!! When i open the car normally there was Welcome Home lights but they dont work. The other thing is, DRL is normally the brightest when the lights are off, and when you turn on the city and normal lights they get less brighter but i have it the other way around. Who knows where i have to look to fix this??

All help will be appreciated 👍🏼

 

[Handy Andy]

You may need to find a kit that updates the Headlamp wiring harness to include the new pin-out that would be used for a DRLS system. Not sure if it came with DRL (or DRLS), when you did the conversion the headlamp you swapped might not have DRLS or used Tungsten (Halogen) - for the LED system being such low-power - had a different requirement and this includes a FORSCAN Body Control Module (the one that controls the lighting) re-programming.

The "Wakeup" or Welcome perimeter lighting feature that comes with the standard headlamp - is the biggest clue. The LED conversion may need to use dropping resistors as a type of ballast to let the system see a short like a cold filament - but being LED is actually a high-impedance low-power consumption device which the BCM for 2014 can't process - at least not without some type of upgrade to either the BCM or the use of ballast to "fool" the system into thinking it's got old style bulbs.