I’ve had hids on the car for at least 13 years. Recently my driver side stopped working. So this is where it gets confusing. To test if it was the bulb or ballast I removed both headlight assemblies and swapped to the opposite side. Now the driver side(passenger headlight assembly) worked and the passenger side (driver headlight assembly) didn’t. So this confirmed to me that it was the bulb and not the ballast. Today I put a new bulb in the driver side. Now unless I’m blind when I turned everything on the driver side now worked but the passenger side didn’t. Now it gets weird. A few hours go by and I went back out and was going to check connections. I turned on my lights and now the passenger side works and the driver side doesn’t. I pulled both assemblies out and swapped bulbs from side to side. I plugged just the driver side back in and tested it and it worked. I plugged the passenger side back in and now the passenger side works and the driver side doesn’t. Even though 5 minutes earlier it did when just the driver side was plugged in. Does anyone have any idea what is going on?