I purchased these head lights awhile back and they never have really been wired correctly they just had the factory harness cut off and hardwired to the new headlights. I have the chrome diamond cut headlights with the h4 bulbs but whenever I put on the high beams they flicker and I just got my car out for the first time this season and one headlight doesn't work. Any suggestions? Buy the proper harness?

 

H4 conversions require higher current needs than the stock wiring can provide and result in many problems. You can build or purchase a relay harness that will work well in this case. Here's an article from the howtos section that outlines the whole process. I think Summit or various other vendors offer pre-made harnesses, you'll have to look. Here ya go
https://www.thirdgen.org/headlightupgrade/
Henry