Hi Bobinor and welcome to the Ford Fusion Club. Unfortunately yes, if you still get flickering after reinstalling the halogen bulbs, there is probably damage to the lighting/electrical system.2014 Ford fusion
I got new led headlights (auxobeam f3 canbus). My led headlights(low beam,high beam) flickers when i use turn signals
I checked switches,alternator, battery change... Nothing wrong with those
I had hid kit before
recently i changed to led headlights.. Now i have the problem even on halogen
Flickers only with ignition on
Is it possible that i broke BCM?(resistor or mosfets)
Normally troubleshooting (and overall advice) would be to reinstall the halogen bulbs. However, since you already did that and the problem is still present, further troubleshooting will need to be performed by a shop, unless you have the tools to do it.
Let us know how you make out and good luck.