Loud vibration sound
 

Hello so i just installed a relay harness for my fog lights.
When i start the car and turn the lights on, a loud vibrating buzzing sounds starts seconds after the bulbs charge up
I had error decoders from relat to ballast but that did not stop the buzzing
So i decided to connect the error decoder with the OEM car plug to the relay harness
And left the relay harness connect directly to the ballast.
Doing this, it stopped the loud vibrating sound but i was wondering if theres any drawback from doing this on the long run.
Thank you.