Hi,
The fog light won't prevent it from working. They receive their own power supply.
Did the light stop working after you did work on it?
I attached two pics below. First, check the fuses I circled in pic 1.
If the fuses are good, confirm there is power to and from them. Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-a-car-fuse
If the fuses are good, I need you to disconnect the light and check the blue wire with a yellow tracer. It should have power when the lights are turned on low beam. See pic 2.
Let me know what you find.
Joe
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Saturday, September 12th, 2020 AT 6:35 PM