I've been having headlight issues with factory HIDs. Sometimes the driver side or passenger side won't turn on. If I try to turn them off and on, they both won't turn on. I thought it was a grounding problem but the mechanic said it wasn't.

So I had the headlight switch replaced since the mechanic recommended it. Now after replacing it, neither of them turn on..

 

my buddy is really really good at this stuff,,,,, pm me if you want more details

 

Could be the relay.