That may be your problem. I have heard the HIDs have a high start up current. i have also heard of fires caused by hids wired directly to the lighting circuit and was advised to grab one with a relay harness. The relay harness I have has a 40a fuse. I have had my o-nex headlight kit ( $90 from amazon) for 14 months without issue the junk kit that came with my projector fogs lasted less than 6.
Get a good kit and it will last you.
If you can't afford a good kit. at least get the relay harness.
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